mirror of
https://github.com/rancher/rke.git
synced 2025-07-05 19:47:47 +00:00
8aa6283dcd
Added retry for snapshot and s3 upload, verify etcd running on host Added option to quiet noisy container logs
835 lines
33 KiB
Go
835 lines
33 KiB
Go
package docker
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import (
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"archive/tar"
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"bytes"
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"context"
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"encoding/base64"
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"encoding/json"
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"fmt"
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"io"
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"io/ioutil"
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"os"
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"strings"
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"time"
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"github.com/rancher/rke/util"
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"github.com/coreos/go-semver/semver"
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ref "github.com/docker/distribution/reference"
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"github.com/docker/docker/api/types"
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"github.com/docker/docker/api/types/container"
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"github.com/docker/docker/client"
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"github.com/docker/docker/pkg/stdcopy"
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"github.com/rancher/rke/log"
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"github.com/rancher/rke/metadata"
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v3 "github.com/rancher/rke/types"
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"github.com/sirupsen/logrus"
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"k8s.io/apimachinery/pkg/util/sets"
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)
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const (
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DockerRegistryURL = "docker.io"
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// RestartTimeout in seconds
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RestartTimeout = 5
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// StopTimeout in seconds
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StopTimeout = 5
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// RetryCount is the amount of retries for Docker operations
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RetryCount = 3
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// WaitTimeout in seconds
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WaitTimeout = 300
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// WaitTimeoutContextKey name
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WaitTimeoutContextKey = "wait_timeout"
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)
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type dockerConfig struct {
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Auths map[string]authConfig `json:"auths,omitempty"`
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CredHelpers map[string]string `json:"credHelpers,omitempty"`
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}
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type authConfig types.AuthConfig
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func DoRunContainer(ctx context.Context, dClient *client.Client, imageCfg *container.Config, hostCfg *container.HostConfig,
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containerName string, hostname string, plane string, prsMap map[string]v3.PrivateRegistry) error {
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if dClient == nil {
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return fmt.Errorf("[%s] Failed to run container: docker client is nil for container [%s] on host [%s]",
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plane, containerName, hostname)
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}
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container, err := InspectContainer(ctx, dClient, hostname, containerName)
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if err != nil {
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if !client.IsErrNotFound(err) {
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return err
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}
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if err := UseLocalOrPull(ctx, dClient, hostname, imageCfg.Image, plane, prsMap); err != nil {
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return fmt.Errorf("Failed to pull image [%s] on host [%s]: %v", imageCfg.Image, hostname, err)
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}
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_, err := CreateContainer(ctx, dClient, hostname, containerName, imageCfg, hostCfg)
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if err != nil {
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return fmt.Errorf("Failed to create [%s] container on host [%s]: %v", containerName, hostname, err)
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}
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if err := StartContainer(ctx, dClient, hostname, containerName); err != nil {
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return fmt.Errorf("Failed to start [%s] container on host [%s]: %v", containerName, hostname, err)
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}
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log.Infof(ctx, "[%s] Successfully started [%s] container on host [%s]", plane, containerName, hostname)
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return nil
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}
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// Check for upgrades
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if container.State.Running {
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// check if container is in a restarting loop
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if container.State.Restarting {
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logrus.Debugf("[%s] Container [%s] is in a restarting loop [%s]", plane, containerName, hostname)
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err = RestartContainer(ctx, dClient, hostname, containerName)
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if err != nil {
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return err
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}
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}
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logrus.Debugf("[%s] Container [%s] is already running on host [%s]", plane, containerName, hostname)
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isUpgradable, err := IsContainerUpgradable(ctx, dClient, imageCfg, hostCfg, containerName, hostname, plane)
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if err != nil {
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return err
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}
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if isUpgradable {
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return DoRollingUpdateContainer(ctx, dClient, imageCfg, hostCfg, containerName, hostname, plane, prsMap)
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}
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return nil
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}
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// start if not running
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logrus.Infof("[%s] Starting stopped container [%s] on host [%s]", plane, containerName, hostname)
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if err := StartContainer(ctx, dClient, hostname, containerName); err != nil {
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return fmt.Errorf("Failed to start [%s] container on host [%s]: %v", containerName, hostname, err)
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}
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log.Infof(ctx, "[%s] Successfully started [%s] container on host [%s]", plane, containerName, hostname)
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return nil
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}
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func DoRunOnetimeContainer(ctx context.Context, dClient *client.Client, imageCfg *container.Config, hostCfg *container.HostConfig, containerName string, hostname string, plane string, prsMap map[string]v3.PrivateRegistry) error {
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if dClient == nil {
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return fmt.Errorf("[%s] Failed to run container: docker client is nil for container [%s] on host [%s]", plane, containerName, hostname)
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}
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_, err := InspectContainer(ctx, dClient, hostname, containerName)
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if err != nil {
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if !client.IsErrNotFound(err) {
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return err
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}
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if err := UseLocalOrPull(ctx, dClient, hostname, imageCfg.Image, plane, prsMap); err != nil {
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return err
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}
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_, err := CreateContainer(ctx, dClient, hostname, containerName, imageCfg, hostCfg)
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if err != nil {
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return fmt.Errorf("Failed to create [%s] container on host [%s]: %v", containerName, hostname, err)
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}
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if err := StartContainer(ctx, dClient, hostname, containerName); err != nil {
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return fmt.Errorf("Failed to start [%s] container on host [%s]: %v", containerName, hostname, err)
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}
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log.Infof(ctx, "Successfully started [%s] container on host [%s]", containerName, hostname)
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log.Infof(ctx, "Waiting for [%s] container to exit on host [%s]", containerName, hostname)
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exitCode, err := WaitForContainer(ctx, dClient, hostname, containerName, true)
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if err != nil {
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return fmt.Errorf("Container [%s] did not complete in time on host [%s]", containerName, hostname)
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}
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if exitCode != 0 {
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stderr, stdout, err := GetContainerLogsStdoutStderr(ctx, dClient, containerName, "1", false)
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if err != nil {
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return fmt.Errorf("Unable to retrieve logs for container [%s] on host [%s]: %v", containerName, hostname, err)
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}
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stderr = strings.TrimSuffix(stderr, "\n")
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stdout = strings.TrimSuffix(stdout, "\n")
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return fmt.Errorf("Container [%s] exited with non-zero exit code [%d] on host [%s]: stdout: %s, stderr: %s", containerName, exitCode, hostname, stdout, stderr)
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}
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return nil
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}
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return err
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}
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func DoCopyToContainer(ctx context.Context, dClient *client.Client, plane, containerName, hostname, destinationDir string, tarFile io.Reader) error {
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if dClient == nil {
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return fmt.Errorf("[%s] Failed to run container: docker client is nil for container [%s] on host [%s]", plane, containerName, hostname)
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}
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// Need container.ID for CopyToContainer function
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container, err := InspectContainer(ctx, dClient, hostname, containerName)
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if err != nil {
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return fmt.Errorf("Could not inspect container [%s] on host [%s]: %s", containerName, hostname, err)
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}
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err = dClient.CopyToContainer(ctx, container.ID, destinationDir, tarFile, types.CopyToContainerOptions{})
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if err != nil {
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return fmt.Errorf("Error while copying file to container [%s] on host [%s]: %v", containerName, hostname, err)
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}
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return nil
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}
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func DoRollingUpdateContainer(ctx context.Context, dClient *client.Client, imageCfg *container.Config, hostCfg *container.HostConfig, containerName, hostname, plane string, prsMap map[string]v3.PrivateRegistry) error {
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if dClient == nil {
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return fmt.Errorf("[%s] Failed rolling update of container: docker client is nil for container [%s] on host [%s]", plane, containerName, hostname)
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}
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logrus.Debugf("[%s] Checking for deployed [%s]", plane, containerName)
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exists, err := DoesContainerExist(ctx, dClient, hostname, containerName, false)
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if err != nil {
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return err
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}
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if !exists {
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logrus.Debugf("[%s] Container %s is not running on host [%s]", plane, containerName, hostname)
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return nil
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}
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err = UseLocalOrPull(ctx, dClient, hostname, imageCfg.Image, plane, prsMap)
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if err != nil {
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return err
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}
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logrus.Debugf("[%s] Stopping old container", plane)
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oldContainerName := "old-" + containerName
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if err := StopRenameContainer(ctx, dClient, hostname, containerName, oldContainerName); err != nil {
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return err
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}
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logrus.Debugf("[%s] Successfully stopped old container %s on host [%s]", plane, containerName, hostname)
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_, err = CreateContainer(ctx, dClient, hostname, containerName, imageCfg, hostCfg)
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if err != nil {
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return fmt.Errorf("Failed to create [%s] container on host [%s]: %v", containerName, hostname, err)
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}
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if err := StartContainer(ctx, dClient, hostname, containerName); err != nil {
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return fmt.Errorf("Failed to start [%s] container on host [%s]: %v", containerName, hostname, err)
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}
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log.Infof(ctx, "[%s] Successfully updated [%s] container on host [%s]", plane, containerName, hostname)
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logrus.Debugf("[%s] Removing old container", plane)
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err = RemoveContainer(ctx, dClient, hostname, oldContainerName)
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return err
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}
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func DoRemoveContainer(ctx context.Context, dClient *client.Client, containerName, hostname string) error {
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if dClient == nil {
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return fmt.Errorf("Failed to remove container: docker client is nil for container [%s] on host [%s]", containerName, hostname)
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}
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logrus.Debugf("[remove/%s] Checking if container is running on host [%s]", containerName, hostname)
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_, err := InspectContainer(ctx, dClient, hostname, containerName)
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if err != nil {
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if client.IsErrNotFound(err) {
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logrus.Debugf("[remove/%s] Container doesn't exist on host [%s]", containerName, hostname)
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return nil
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}
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return err
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}
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logrus.Debugf("[remove/%s] Removing container on host [%s]", containerName, hostname)
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err = RemoveContainer(ctx, dClient, hostname, containerName)
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if err != nil {
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return err
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}
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log.Infof(ctx, "[remove/%s] Successfully removed container on host [%s]", containerName, hostname)
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return nil
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}
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func FindContainer(ctx context.Context, dClient *client.Client, hostname string, containerName string, all bool) (*types.Container, error) {
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if dClient == nil {
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return nil, fmt.Errorf("Failed to find container: docker client is nil for container [%s] on host [%s]", containerName, hostname)
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}
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var containers []types.Container
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var err error
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for i := 1; i <= RetryCount; i++ {
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logrus.Infof("Finding container [%s] on host [%s], try #%d", containerName, hostname, i)
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containers, err = dClient.ContainerList(ctx, types.ContainerListOptions{All: all})
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if err != nil {
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logrus.Warnf("Error finding container [%s] exists on host [%s]: %v", containerName, hostname, err)
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continue
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}
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break
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}
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if err != nil {
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return nil, fmt.Errorf("Error checking if container [%s] exists on host [%s]: %v", containerName, hostname, err)
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}
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for _, container := range containers {
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if len(container.Names) != 0 && container.Names[0] == "/"+containerName {
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return &container, nil
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}
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}
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return nil, nil
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}
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func DoesContainerExist(ctx context.Context, dClient *client.Client, hostname string, containerName string, all bool) (bool, error) {
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if dClient == nil {
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return false, fmt.Errorf("Failed to check if container exists: docker client is nil for container [%s] on host [%s]", containerName, hostname)
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}
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container, err := FindContainer(ctx, dClient, hostname, containerName, all)
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if err != nil {
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return false, fmt.Errorf("Error checking if container [%s] is running on host [%s]: %v", containerName, hostname, err)
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}
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return container != nil, nil
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}
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func IsContainerRunning(ctx context.Context, dClient *client.Client, hostname string, containerName string, all bool) (bool, error) {
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if dClient == nil {
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return false, fmt.Errorf("Failed to check if container is running: docker client is nil for container [%s] on host [%s]", containerName, hostname)
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}
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container, err := FindContainer(ctx, dClient, hostname, containerName, all)
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if err != nil {
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return false, fmt.Errorf("Error checking if container [%s] is running on host [%s]: %v", containerName, hostname, err)
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}
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return container != nil && container.State == "running", nil
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}
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func localImageExists(ctx context.Context, dClient *client.Client, hostname string, containerImage string) error {
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var err error
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for i := 1; i <= RetryCount; i++ {
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logrus.Debugf("Checking if image [%s] exists on host [%s], try #%d", containerImage, hostname, i)
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_, _, err = dClient.ImageInspectWithRaw(ctx, containerImage)
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if err != nil {
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if client.IsErrNotFound(err) {
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logrus.Debugf("Image [%s] does not exist on host [%s]: %v", containerImage, hostname, err)
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return err
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}
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logrus.Debugf("Error checking if image [%s] exists on host [%s]: %v", containerImage, hostname, err)
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continue
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}
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logrus.Infof("Image [%s] exists on host [%s]", containerImage, hostname)
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return nil
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}
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return fmt.Errorf("Error checking if image [%s] exists on host [%s]: %v", containerImage, hostname, err)
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}
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func pullImage(ctx context.Context, dClient *client.Client, hostname string, containerImage string,
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prsMap map[string]v3.PrivateRegistry) error {
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var out io.ReadCloser
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var err error
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pullOptions := types.ImagePullOptions{}
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regAuth, prURL, err := GetImageRegistryConfig(containerImage, prsMap)
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if err != nil {
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return err
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}
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if regAuth != "" && prURL == DockerRegistryURL {
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pullOptions.PrivilegeFunc = tryRegistryAuth(prsMap[prURL])
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}
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pullOptions.RegistryAuth = regAuth
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// Retry up to RetryCount times to pull image
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for i := 1; i <= RetryCount; i++ {
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logrus.Infof("Pulling image [%s] on host [%s], try #%d", containerImage, hostname, i)
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out, err = dClient.ImagePull(ctx, containerImage, pullOptions)
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if err != nil {
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logrus.Warnf("Can't pull Docker image [%s] on host [%s]: %v", containerImage, hostname, err)
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continue
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}
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defer out.Close()
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if logrus.GetLevel() == logrus.TraceLevel {
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io.Copy(os.Stdout, out)
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} else {
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io.Copy(ioutil.Discard, out)
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}
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return nil
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}
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// If the for loop does not return, return the error
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return err
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}
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func UseLocalOrPull(ctx context.Context, dClient *client.Client, hostname string, containerImage string, plane string,
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prsMap map[string]v3.PrivateRegistry) error {
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if dClient == nil {
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return fmt.Errorf("[%s] Failed to use local image or pull: docker client is nil for container [%s] on host [%s]", plane, containerImage, hostname)
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}
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var err error
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// Retry up to RetryCount times to see if image exists
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for i := 1; i <= RetryCount; i++ {
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// Increasing wait time on retry, but not on the first two try
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if i > 2 {
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time.Sleep(time.Duration(i) * time.Second)
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}
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if err = localImageExists(ctx, dClient, hostname, containerImage); err == nil {
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// Return if image exists to prevent pulling
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return nil
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}
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// If error, log and retry
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if !client.IsErrNotFound(err) {
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logrus.Debugf("[%s] %v", plane, err)
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continue
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}
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// Try pulling when not found and if error, log and retry
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err = pullImage(ctx, dClient, hostname, containerImage, prsMap)
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if err != nil {
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logrus.Debugf("[%s] Can't pull Docker image [%s] on host [%s]: %v", plane, containerImage, hostname, err)
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continue
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}
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}
|
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// If the for loop does not return, return the error
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if err != nil {
|
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// Although error should be logged in the caller stack, logging the final error here just in case. Mostly
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// because error logging was reduced in other places
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logrus.Warnf("[%s] Can't pull Docker image [%s] on host [%s]: %v", plane, containerImage, hostname, err)
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}
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return err
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}
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|
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func RemoveContainer(ctx context.Context, dClient *client.Client, hostname string, containerName string) error {
|
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if dClient == nil {
|
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return fmt.Errorf("Failed to remove container: docker client is nil for container [%s] on host [%s]", containerName, hostname)
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}
|
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var err error
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// Retry up to RetryCount times to see if image exists
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for i := 1; i <= RetryCount; i++ {
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logrus.Infof("Removing container [%s] on host [%s], try #%d", containerName, hostname, i)
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err = dClient.ContainerRemove(ctx, containerName, types.ContainerRemoveOptions{Force: true, RemoveVolumes: true})
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if err != nil {
|
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logrus.Warningf("Can't remove Docker container [%s] for host [%s]: %v", containerName, hostname, err)
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continue
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}
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return nil
|
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}
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return err
|
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}
|
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|
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func RestartContainer(ctx context.Context, dClient *client.Client, hostname, containerName string) error {
|
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if dClient == nil {
|
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return fmt.Errorf("Failed to restart container: docker client is nil for container [%s] on host [%s]", containerName, hostname)
|
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}
|
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var err error
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restartTimeout := RestartTimeout * time.Second
|
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// Retry up to RetryCount times to see if image exists
|
|
for i := 1; i <= RetryCount; i++ {
|
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logrus.Infof("Restarting container [%s] on host [%s], try #%d", containerName, hostname, i)
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err = dClient.ContainerRestart(ctx, containerName, &restartTimeout)
|
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if err != nil {
|
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logrus.Warningf("Can't restart Docker container [%s] for host [%s]: %v", containerName, hostname, err)
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continue
|
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}
|
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return nil
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}
|
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return err
|
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}
|
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func StopContainer(ctx context.Context, dClient *client.Client, hostname string, containerName string) error {
|
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if dClient == nil {
|
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return fmt.Errorf("Failed to stop container: docker client is nil for container [%s] on host [%s]", containerName, hostname)
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}
|
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var err error
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// define the stop timeout
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stopTimeoutDuration := StopTimeout * time.Second
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// Retry up to RetryCount times to see if image exists
|
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for i := 1; i <= RetryCount; i++ {
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logrus.Infof("Stopping container [%s] on host [%s] with stopTimeoutDuration [%s], try #%d", containerName, hostname, stopTimeoutDuration, i)
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err = dClient.ContainerStop(ctx, containerName, &stopTimeoutDuration)
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if err != nil {
|
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logrus.Warningf("Can't stop Docker container [%s] for host [%s]: %v", containerName, hostname, err)
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continue
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}
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return nil
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}
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return err
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}
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|
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func RenameContainer(ctx context.Context, dClient *client.Client, hostname string, oldContainerName string, newContainerName string) error {
|
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if dClient == nil {
|
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return fmt.Errorf("Failed to rename container: docker client is nil for container [%s] on host [%s]", oldContainerName, hostname)
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}
|
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var err error
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// Retry up to RetryCount times to see if image exists
|
|
for i := 1; i <= RetryCount; i++ {
|
|
logrus.Infof("Renaming container [%s] to [%s] on host [%s], try #%d", oldContainerName, newContainerName, hostname, i)
|
|
err = dClient.ContainerRename(ctx, oldContainerName, newContainerName)
|
|
if err != nil {
|
|
logrus.Warningf("Can't rename Docker container [%s] to [%s] for host [%s]: %v", oldContainerName, newContainerName, hostname, err)
|
|
continue
|
|
}
|
|
return nil
|
|
}
|
|
return err
|
|
}
|
|
|
|
func StartContainer(ctx context.Context, dClient *client.Client, hostname string, containerName string) error {
|
|
if dClient == nil {
|
|
return fmt.Errorf("Failed to start container: docker client is nil for container [%s] on host [%s]", containerName, hostname)
|
|
}
|
|
var err error
|
|
// Retry up to RetryCount times to see if image exists
|
|
for i := 1; i <= RetryCount; i++ {
|
|
logrus.Infof("Starting container [%s] on host [%s], try #%d", containerName, hostname, i)
|
|
err = dClient.ContainerStart(ctx, containerName, types.ContainerStartOptions{})
|
|
if err != nil {
|
|
if strings.Contains(err.Error(), "bind: address already in use") || strings.Contains(err.Error(), "invalid argument") {
|
|
return err
|
|
}
|
|
logrus.Warningf("Can't start Docker container [%s] on host [%s]: %v", containerName, hostname, err)
|
|
continue
|
|
}
|
|
return nil
|
|
}
|
|
return err
|
|
}
|
|
|
|
func CreateContainer(ctx context.Context, dClient *client.Client, hostname string, containerName string, imageCfg *container.Config, hostCfg *container.HostConfig) (container.ContainerCreateCreatedBody, error) {
|
|
if dClient == nil {
|
|
return container.ContainerCreateCreatedBody{}, fmt.Errorf("Failed to create container: docker client is nil for container [%s] on host [%s]", containerName, hostname)
|
|
}
|
|
var created container.ContainerCreateCreatedBody
|
|
var err error
|
|
// Retry up to RetryCount times to see if image exists
|
|
for i := 1; i <= RetryCount; i++ {
|
|
created, err = dClient.ContainerCreate(ctx, imageCfg, hostCfg, nil, nil, containerName)
|
|
if err != nil {
|
|
logrus.Warningf("Failed to create Docker container [%s] on host [%s]: %v", containerName, hostname, err)
|
|
continue
|
|
}
|
|
return created, nil
|
|
}
|
|
return container.ContainerCreateCreatedBody{}, fmt.Errorf("Failed to create Docker container [%s] on host [%s]: %v", containerName, hostname, err)
|
|
}
|
|
|
|
func InspectContainer(ctx context.Context, dClient *client.Client, hostname string, containerName string) (types.ContainerJSON, error) {
|
|
if dClient == nil {
|
|
return types.ContainerJSON{}, fmt.Errorf("Failed to inspect container: docker client is nil for container [%s] on host [%s]", containerName, hostname)
|
|
}
|
|
var inspection types.ContainerJSON
|
|
var err error
|
|
// Retry up to RetryCount times to see if image exists
|
|
for i := 1; i <= RetryCount; i++ {
|
|
inspection, err = dClient.ContainerInspect(ctx, containerName)
|
|
if err != nil {
|
|
if client.IsErrNotFound(err) {
|
|
return types.ContainerJSON{}, err
|
|
}
|
|
logrus.Warningf("Failed to inspect Docker container [%s] on host [%s]: %v", containerName, hostname, err)
|
|
continue
|
|
}
|
|
return inspection, nil
|
|
}
|
|
return types.ContainerJSON{}, fmt.Errorf("Failed to inspect Docker container [%s] on host [%s]: %v", containerName, hostname, err)
|
|
}
|
|
|
|
func StopRenameContainer(ctx context.Context, dClient *client.Client, hostname string, oldContainerName string, newContainerName string) error {
|
|
if dClient == nil {
|
|
return fmt.Errorf("Failed to stop and rename container: docker client is nil for container [%s] on host [%s]", oldContainerName, hostname)
|
|
}
|
|
// make sure we don't have an old old-container from a previous broken update
|
|
exists, err := DoesContainerExist(ctx, dClient, hostname, newContainerName, true)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if exists {
|
|
if err := RemoveContainer(ctx, dClient, hostname, newContainerName); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
if err := StopContainer(ctx, dClient, hostname, oldContainerName); err != nil {
|
|
return err
|
|
}
|
|
if _, err := WaitForContainer(ctx, dClient, hostname, oldContainerName, true); err != nil {
|
|
return err
|
|
}
|
|
return RenameContainer(ctx, dClient, hostname, oldContainerName, newContainerName)
|
|
|
|
}
|
|
|
|
func WaitForContainer(ctx context.Context, dClient *client.Client, hostname string, containerName string, noisy bool) (int64, error) {
|
|
if dClient == nil {
|
|
return 1, fmt.Errorf("Failed waiting for container: docker client is nil for container [%s] on host [%s]", containerName, hostname)
|
|
}
|
|
// Set containerTimeout value from context or default. Especially for transferring snapshots
|
|
containerTimeout := WaitTimeout
|
|
if v, ok := ctx.Value(WaitTimeoutContextKey).(int); ok && v > 0 {
|
|
containerTimeout = v
|
|
}
|
|
log.Infof(ctx, "Waiting for [%s] container to exit on host [%s]", containerName, hostname)
|
|
var lastStdout, lastStderr string
|
|
for retries := 0; retries < containerTimeout; retries++ {
|
|
container, err := InspectContainer(ctx, dClient, hostname, containerName)
|
|
if err != nil {
|
|
return 1, fmt.Errorf("Could not inspect container [%s] on host [%s]: %s", containerName, hostname, err)
|
|
}
|
|
if container.State.Running {
|
|
stderr, stdout, err := GetContainerLogsStdoutStderr(ctx, dClient, containerName, "1", false)
|
|
if err != nil {
|
|
logrus.Warnf("Failed to get container logs from container [%s] on host [%s]: %v", containerName, hostname, err)
|
|
}
|
|
if noisy || lastStdout != stdout || lastStderr != stderr {
|
|
log.Infof(ctx, "Container [%s] is still running on host [%s]: stderr: [%s], stdout: [%s]", containerName, hostname, stderr, stdout)
|
|
lastStdout = stdout
|
|
lastStderr = stderr
|
|
}
|
|
|
|
time.Sleep(1 * time.Second)
|
|
continue
|
|
}
|
|
logrus.Debugf("Exit code for [%s] container on host [%s] is [%d]", containerName, hostname, int64(container.State.ExitCode))
|
|
return int64(container.State.ExitCode), nil
|
|
}
|
|
stderr, stdout, err := GetContainerLogsStdoutStderr(ctx, dClient, containerName, "1", false)
|
|
if err != nil {
|
|
logrus.Warnf("Failed to get container logs from container [%s] on host [%s]", containerName, hostname)
|
|
}
|
|
|
|
return 1, fmt.Errorf("Container [%s] did not exit in time on host [%s]: stderr: [%s], stdout: [%s]", containerName, hostname, stderr, stdout)
|
|
}
|
|
|
|
func IsContainerUpgradable(ctx context.Context, dClient *client.Client, imageCfg *container.Config, hostCfg *container.HostConfig, containerName string, hostname string, plane string) (bool, error) {
|
|
if dClient == nil {
|
|
return false, fmt.Errorf("[%s] Failed checking if container is upgradable: docker client is nil for container [%s] on host [%s]", plane, containerName, hostname)
|
|
}
|
|
logrus.Debugf("[%s] Checking if container [%s] is eligible for upgrade on host [%s]", plane, containerName, hostname)
|
|
// this should be moved to a higher layer.
|
|
|
|
containerInspect, err := InspectContainer(ctx, dClient, hostname, containerName)
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
// image inspect to compare the env correctly
|
|
imageInspect, _, err := dClient.ImageInspectWithRaw(ctx, imageCfg.Image)
|
|
if err != nil {
|
|
if !client.IsErrNotFound(err) {
|
|
return false, err
|
|
}
|
|
logrus.Debugf("[%s] Container [%s] is eligible for upgrade on host [%s]", plane, containerName, hostname)
|
|
return true, nil
|
|
}
|
|
if containerInspect.Config.Image != imageCfg.Image ||
|
|
!sliceEqualsIgnoreOrder(containerInspect.Config.Entrypoint, imageCfg.Entrypoint) ||
|
|
!sliceEqualsIgnoreOrder(containerInspect.Config.Cmd, imageCfg.Cmd) ||
|
|
!isContainerEnvChanged(containerInspect.Config.Env, imageCfg.Env, imageInspect.Config.Env) ||
|
|
!sliceEqualsIgnoreOrder(containerInspect.HostConfig.Binds, hostCfg.Binds) ||
|
|
!securityOptsliceEqualsIgnoreOrder(containerInspect.HostConfig.SecurityOpt, hostCfg.SecurityOpt) {
|
|
logrus.Debugf("[%s] Container [%s] is eligible for upgrade on host [%s]", plane, containerName, hostname)
|
|
return true, nil
|
|
}
|
|
logrus.Debugf("[%s] Container [%s] is not eligible for upgrade on host [%s]", plane, containerName, hostname)
|
|
return false, nil
|
|
}
|
|
|
|
func sliceEqualsIgnoreOrder(left, right []string) bool {
|
|
if equal := sets.NewString(left...).Equal(sets.NewString(right...)); !equal {
|
|
logrus.Debugf("slice is not equal, showing data in new value which is not in old value: %v", sets.NewString(right...).Difference(sets.NewString(left...)))
|
|
logrus.Debugf("slice is not equal, showing data in old value which is not in new value: %v", sets.NewString(left...).Difference(sets.NewString(right...)))
|
|
return false
|
|
}
|
|
return true
|
|
}
|
|
|
|
func securityOptsliceEqualsIgnoreOrder(left, right []string) bool {
|
|
if equal := sets.NewString(left...).Equal(sets.NewString(right...)); !equal {
|
|
logrus.Debugf("slice is not equal, showing data in new value which is not in old value: %v", sets.NewString(right...).Difference(sets.NewString(left...)))
|
|
diff := sets.NewString(left...).Difference(sets.NewString(right...))
|
|
logrus.Debugf("slice is not equal, showing data in old value which is not in new value: %v", diff)
|
|
// Docker sets label=disable automatically on all non labeled containers with will result in a false diff between spec and the actual running container
|
|
// If the diff matches the disable label exactly, we still report true as being equal
|
|
if equal := sets.NewString([]string{"label=disable"}...).Equal(diff); equal {
|
|
logrus.Debugf("returning equal as true because diff matches the automatically added disable label for SELinux which can be ignored: %v", diff)
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
return true
|
|
}
|
|
|
|
func IsSupportedDockerVersion(info types.Info, K8sVersion string) (bool, error) {
|
|
dockerVersion, err := semver.NewVersion(info.ServerVersion)
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
for _, DockerVersion := range metadata.K8sVersionToDockerVersions[K8sVersion] {
|
|
supportedDockerVersion, err := convertToSemver(DockerVersion)
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
if dockerVersion.Major == supportedDockerVersion.Major && dockerVersion.Minor == supportedDockerVersion.Minor {
|
|
return true, nil
|
|
}
|
|
|
|
}
|
|
return false, nil
|
|
}
|
|
|
|
func ReadFileFromContainer(ctx context.Context, dClient *client.Client, hostname, container, filePath string) (string, error) {
|
|
if dClient == nil {
|
|
return "", fmt.Errorf("Failed reading file from container: docker client is nil for container [%s] on host [%s]", container, hostname)
|
|
}
|
|
reader, _, err := dClient.CopyFromContainer(ctx, container, filePath)
|
|
if err != nil {
|
|
return "", fmt.Errorf("Failed to copy file [%s] from container [%s] on host [%s]: %v", filePath, container, hostname, err)
|
|
}
|
|
defer reader.Close()
|
|
tarReader := tar.NewReader(reader)
|
|
if _, err := tarReader.Next(); err != nil {
|
|
return "", err
|
|
}
|
|
file, err := ioutil.ReadAll(tarReader)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
return string(file), nil
|
|
}
|
|
|
|
func ReadContainerLogs(ctx context.Context, dClient *client.Client, containerName string, follow bool, tail string) (io.ReadCloser, error) {
|
|
if dClient == nil {
|
|
return nil, fmt.Errorf("Failed reading container logs: docker client is nil for container [%s]", containerName)
|
|
}
|
|
var logs io.ReadCloser
|
|
var err error
|
|
for i := 1; i <= RetryCount; i++ {
|
|
logs, err = dClient.ContainerLogs(ctx, containerName, types.ContainerLogsOptions{Follow: follow, ShowStdout: true, ShowStderr: true, Timestamps: false, Tail: tail})
|
|
if err != nil {
|
|
logrus.Warnf("Can't read container logs for container [%s]: %v", containerName, err)
|
|
continue
|
|
}
|
|
return logs, nil
|
|
}
|
|
return nil, err
|
|
}
|
|
|
|
func GetContainerLogsStdoutStderr(ctx context.Context, dClient *client.Client, containerName, tail string, follow bool) (string, string, error) {
|
|
if dClient == nil {
|
|
return "", "", fmt.Errorf("Failed to get container logs stdout and stderr: docker client is nil for container [%s]", containerName)
|
|
}
|
|
var containerStderr bytes.Buffer
|
|
var containerStdout bytes.Buffer
|
|
var containerErrLog, containerStdLog string
|
|
clogs, logserr := ReadContainerLogs(ctx, dClient, containerName, follow, tail)
|
|
if logserr != nil || clogs == nil {
|
|
logrus.Debugf("logserr: %v", logserr)
|
|
return containerErrLog, containerStdLog, fmt.Errorf("Failed to get gather logs from container [%s]: %v", containerName, logserr)
|
|
}
|
|
defer clogs.Close()
|
|
stdcopy.StdCopy(&containerStdout, &containerStderr, clogs)
|
|
containerErrLog = containerStderr.String()
|
|
containerStdLog = containerStdout.String()
|
|
return containerErrLog, containerStdLog, nil
|
|
}
|
|
|
|
func tryRegistryAuth(pr v3.PrivateRegistry) types.RequestPrivilegeFunc {
|
|
return func() (string, error) {
|
|
return getRegistryAuth(pr)
|
|
}
|
|
}
|
|
|
|
func getRegistryAuth(pr v3.PrivateRegistry) (string, error) {
|
|
var authConfig types.AuthConfig
|
|
var err error
|
|
if len(pr.User) == 0 && len(pr.Password) == 0 && pr.ECRCredentialPlugin != nil {
|
|
authConfig, err = util.ECRCredentialPlugin(pr.ECRCredentialPlugin, pr.URL)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
} else {
|
|
authConfig = types.AuthConfig{
|
|
Username: pr.User,
|
|
Password: pr.Password,
|
|
}
|
|
}
|
|
|
|
encodedJSON, err := json.Marshal(authConfig)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
return base64.URLEncoding.EncodeToString(encodedJSON), nil
|
|
}
|
|
|
|
func GetImageRegistryConfig(image string, prsMap map[string]v3.PrivateRegistry) (string, string, error) {
|
|
/*
|
|
Image can be passed as
|
|
- Example1: repo.com/foo/bar/rancher/rke-tools:v0.1.51
|
|
or
|
|
- Example2: repo.com/rancher/rke-tools:v0.1.51 // image2
|
|
or
|
|
- rancher/rke-tools
|
|
Where the repo can be:
|
|
- repo.com
|
|
or
|
|
- repo.com/foo/bar
|
|
When checking for the repo presence in prsMap, the following repo will be found:
|
|
- Example1: repo.com/foo/bar
|
|
- Exmaple2: repo.com
|
|
*/
|
|
namedImage, err := ref.ParseNormalizedNamed(image)
|
|
if err != nil {
|
|
return "", "", err
|
|
}
|
|
if len(prsMap) == 0 {
|
|
return "", "", nil
|
|
}
|
|
regURL := ref.Domain(namedImage)
|
|
regPath := ref.Path(namedImage)
|
|
|
|
splitPath := strings.Split(regPath, "/")
|
|
if len(splitPath) > 2 {
|
|
splitPath = splitPath[:len(splitPath)-2]
|
|
regPath = strings.Join(splitPath, "/")
|
|
regURL = fmt.Sprintf("%s/%s", regURL, regPath)
|
|
}
|
|
|
|
if pr, ok := prsMap[regURL]; ok {
|
|
logrus.Debugf("Found regURL %v", regURL)
|
|
// We do this if we have some docker.io login information
|
|
regAuth, err := getRegistryAuth(pr)
|
|
return regAuth, pr.URL, err
|
|
}
|
|
|
|
return "", "", nil
|
|
}
|
|
|
|
func convertToSemver(version string) (*semver.Version, error) {
|
|
compVersion := strings.SplitN(version, ".", 3)
|
|
if len(compVersion) != 3 {
|
|
return nil, fmt.Errorf("The default version is not correct")
|
|
}
|
|
compVersion[2] = "0"
|
|
return semver.NewVersion(strings.Join(compVersion, "."))
|
|
}
|
|
|
|
func isContainerEnvChanged(containerEnv, imageConfigEnv, dockerfileEnv []string) bool {
|
|
// remove PATH env from the container env
|
|
allImageEnv := append(imageConfigEnv, dockerfileEnv...)
|
|
return sliceEqualsIgnoreOrder(allImageEnv, containerEnv)
|
|
}
|
|
|
|
func GetKubeletDockerConfig(prsMap map[string]v3.PrivateRegistry) (string, error) {
|
|
auths := map[string]authConfig{}
|
|
credHelper := make(map[string]string)
|
|
for url, pr := range prsMap {
|
|
if pr.ECRCredentialPlugin != nil {
|
|
credHelper[pr.URL] = "ecr-login"
|
|
} else {
|
|
auth := base64.StdEncoding.EncodeToString([]byte(fmt.Sprintf("%s:%s", pr.User, pr.Password)))
|
|
auths[url] = authConfig{Auth: auth}
|
|
}
|
|
}
|
|
cfg, err := json.Marshal(dockerConfig{auths, credHelper})
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
return string(cfg), nil
|
|
}
|
|
|
|
func DoRestartContainer(ctx context.Context, dClient *client.Client, containerName, hostname string) error {
|
|
if dClient == nil {
|
|
return fmt.Errorf("Failed to restart container: docker client is nil for container [%s] on host [%s]", containerName, hostname)
|
|
}
|
|
logrus.Debugf("[restart/%s] Checking if container is running on host [%s]", containerName, hostname)
|
|
_, err := InspectContainer(ctx, dClient, hostname, containerName)
|
|
if err != nil {
|
|
if client.IsErrNotFound(err) {
|
|
logrus.Debugf("[restart/%s] Container doesn't exist on host [%s]", containerName, hostname)
|
|
return nil
|
|
}
|
|
return err
|
|
}
|
|
logrus.Debugf("[restart/%s] Restarting container on host [%s]", containerName, hostname)
|
|
err = RestartContainer(ctx, dClient, hostname, containerName)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
log.Infof(ctx, "[restart/%s] Successfully restarted container on host [%s]", containerName, hostname)
|
|
return nil
|
|
}
|
|
|
|
func GetContainerOutput(ctx context.Context, dClient *client.Client, containerName, hostname string, noisy bool) (int64, string, string, error) {
|
|
if dClient == nil {
|
|
return 1, "", "", fmt.Errorf("Failed to get container output: docker client is nil for container [%s] on host [%s]", containerName, hostname)
|
|
}
|
|
status, err := WaitForContainer(ctx, dClient, hostname, containerName, noisy)
|
|
if err != nil {
|
|
return 1, "", "", err
|
|
}
|
|
|
|
stderr, stdout, err := GetContainerLogsStdoutStderr(ctx, dClient, containerName, "1", false)
|
|
if err != nil {
|
|
return 1, "", "", err
|
|
}
|
|
|
|
return status, stdout, stderr, nil
|
|
}
|