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Merge pull request #86783 from mattjmcnaughton/mattjmcnaughton/remove-unnecessary-modification-container-pid-namespace

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Remove no longer needed `modifyContainerPIDNamespaceOverrides`
This commit is contained in:
Kubernetes Prow Robot 2020-01-10 15:43:50 -08:00 committed by GitHub
commit 8467561f2c
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3 changed files with 0 additions and 65 deletions
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1
pkg/kubelet/dockershim/helpers_linux.go
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@ -120,7 +120,6 @@ func (ds *dockerService) updateCreateConfig(
if err := applyContainerSecurityContext(lc, podSandboxID, createConfig.Config, createConfig.HostConfig, securityOptSep); err != nil {
return fmt.Errorf("failed to apply container security context for container %q: %v", config.Metadata.Name, err)
}
modifyContainerPIDNamespaceOverrides(apiVersion, createConfig.HostConfig, podSandboxID)
}
// Apply cgroupsParent derived from the sandbox config.

13
pkg/kubelet/dockershim/security_context.go
View File

@ -19,9 +19,7 @@ package dockershim
import (
"fmt"
"strconv"
"strings"
"github.com/blang/semver"
dockercontainer "github.com/docker/docker/api/types/container"
runtimeapi "k8s.io/cri-api/pkg/apis/runtime/v1alpha2"
@ -204,14 +202,3 @@ func modifyHostOptionsForContainer(nsOpts *runtimeapi.NamespaceOption, podSandbo
hc.UTSMode = namespaceModeHost
}
}
// modifyPIDNamespaceOverrides implements a temporary override for the default PID namespace sharing for Docker:
// 1. Docker engine prior to API Version 1.24 doesn't support attaching to another container's
// PID namespace, and it didn't stabilize until 1.26. This check can be removed when Kubernetes'
// minimum Docker version is at least 1.13.1 (API version 1.26).
// TODO(verb): remove entirely once these two conditions are satisfied
func modifyContainerPIDNamespaceOverrides(version *semver.Version, hc *dockercontainer.HostConfig, podSandboxID string) {
if version.LT(semver.Version{Major: 1, Minor: 26}) && strings.HasPrefix(string(hc.PidMode), "container:") {
hc.PidMode = ""
}
}

51
pkg/kubelet/dockershim/security_context_test.go
View File

@ -21,7 +21,6 @@ import (
"strconv"
"testing"
"github.com/blang/semver"
dockercontainer "github.com/docker/docker/api/types/container"
"github.com/stretchr/testify/assert"
@ -404,56 +403,6 @@ func TestModifyContainerNamespaceOptions(t *testing.T) {
}
}
func TestModifyContainerNamespacePIDOverride(t *testing.T) {
cases := []struct {
name string
version *semver.Version
input, expected dockercontainer.PidMode
}{
{
name: "mode:CONTAINER docker:NEW",
version: &semver.Version{Major: 1, Minor: 26},
input: "",
expected: "",
},
{
name: "mode:CONTAINER docker:OLD",
version: &semver.Version{Major: 1, Minor: 25},
input: "",
expected: "",
},
{
name: "mode:HOST docker:NEW",
version: &semver.Version{Major: 1, Minor: 26},
input: "host",
expected: "host",
},
{
name: "mode:HOST docker:OLD",
version: &semver.Version{Major: 1, Minor: 25},
input: "host",
expected: "host",
},
{
name: "mode:POD docker:NEW",
version: &semver.Version{Major: 1, Minor: 26},
input: "container:sandbox",
expected: "container:sandbox",
},
{
name: "mode:POD docker:OLD",
version: &semver.Version{Major: 1, Minor: 25},
input: "container:sandbox",
expected: "",
},
}
for _, tc := range cases {
dockerCfg := &dockercontainer.HostConfig{PidMode: tc.input}
modifyContainerPIDNamespaceOverrides(tc.version, dockerCfg, "sandbox")
assert.Equal(t, tc.expected, dockerCfg.PidMode, "[Test case %q]", tc.name)
}
}
func fullValidSecurityContext() *runtimeapi.LinuxContainerSecurityContext {
return &runtimeapi.LinuxContainerSecurityContext{
Privileged: true,