mirror of
https://github.com/rancher/os.git
synced 2025-05-02 13:23:23 +00:00
92 lines
2.1 KiB
Go
92 lines
2.1 KiB
Go
package control
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import (
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"fmt"
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"io/ioutil"
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"os"
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"path"
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"strings"
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"syscall"
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"time"
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"github.com/rancher/os/pkg/log"
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"github.com/rancher/os/pkg/util"
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"github.com/codegangsta/cli"
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)
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const (
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dockerConf = "/var/lib/rancher/conf/docker"
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dockerDone = "/run/docker-done"
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dockerLog = "/var/log/docker.log"
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)
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func dockerInitAction(c *cli.Context) error {
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// TODO: this should be replaced by a "Console ready event watcher"
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for {
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if _, err := os.Stat(consoleDone); err == nil {
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break
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}
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time.Sleep(200 * time.Millisecond)
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}
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dockerBin := ""
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dockerPaths := []string{
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"/usr/bin",
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"/opt/bin",
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"/usr/local/bin",
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"/var/lib/rancher/docker",
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}
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for _, binPath := range dockerPaths {
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if util.ExistsAndExecutable(path.Join(binPath, "dockerd")) {
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dockerBin = path.Join(binPath, "dockerd")
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break
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}
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}
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if dockerBin == "" {
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for _, binPath := range dockerPaths {
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if util.ExistsAndExecutable(path.Join(binPath, "docker")) {
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dockerBin = path.Join(binPath, "docker")
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break
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}
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}
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}
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if dockerBin == "" {
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err := fmt.Errorf("Failed to find either dockerd or docker binaries")
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log.Error(err)
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return err
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}
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log.Infof("Found %s", dockerBin)
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if err := syscall.Mount("", "/", "", syscall.MS_SHARED|syscall.MS_REC, ""); err != nil {
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log.Error(err)
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}
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if err := syscall.Mount("", "/run", "", syscall.MS_SHARED|syscall.MS_REC, ""); err != nil {
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log.Error(err)
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}
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mountInfo, err := ioutil.ReadFile("/proc/self/mountinfo")
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if err != nil {
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return err
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}
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for _, mount := range strings.Split(string(mountInfo), "\n") {
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if strings.Contains(mount, "/var/lib/user-docker /var/lib/docker") && strings.Contains(mount, "rootfs") {
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os.Setenv("DOCKER_RAMDISK", "true")
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}
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}
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args := []string{
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"bash",
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"-c",
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fmt.Sprintf(`[ -e %s ] && source %s; exec /usr/bin/dockerlaunch %s %s $DOCKER_OPTS >> %s 2>&1`, dockerConf, dockerConf, dockerBin, strings.Join(c.Args(), " "), dockerLog),
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}
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// TODO: this should be replaced by a "Docker ready event watcher"
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if err := ioutil.WriteFile(dockerDone, []byte(CurrentEngine()), 0644); err != nil {
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log.Error(err)
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}
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return syscall.Exec("/bin/bash", args, os.Environ())
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}
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