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-rw-r--r--pkg/shim/BUILD14
-rw-r--r--pkg/shim/service.go50
-rw-r--r--pkg/shim/service_test.go121
-rw-r--r--pkg/shim/utils/annotations.go6
-rw-r--r--pkg/shim/utils/utils.go20
-rw-r--r--pkg/shim/utils/volumes.go20
-rw-r--r--pkg/shim/utils/volumes_test.go56
7 files changed, 225 insertions, 62 deletions
diff --git a/pkg/shim/BUILD b/pkg/shim/BUILD
index 4f7c02f5d..fd6127b97 100644
--- a/pkg/shim/BUILD
+++ b/pkg/shim/BUILD
@@ -1,4 +1,4 @@
-load("//tools:defs.bzl", "go_library")
+load("//tools:defs.bzl", "go_library", "go_test")
package(licenses = ["notice"])
@@ -41,7 +41,19 @@ go_library(
"@com_github_containerd_fifo//:go_default_library",
"@com_github_containerd_typeurl//:go_default_library",
"@com_github_gogo_protobuf//types:go_default_library",
+ "@com_github_opencontainers_runtime_spec//specs-go:go_default_library",
"@com_github_sirupsen_logrus//:go_default_library",
"@org_golang_x_sys//unix:go_default_library",
],
)
+
+go_test(
+ name = "shim_test",
+ size = "small",
+ srcs = ["service_test.go"],
+ library = ":shim",
+ deps = [
+ "//pkg/shim/utils",
+ "@com_github_opencontainers_runtime_spec//specs-go:go_default_library",
+ ],
+)
diff --git a/pkg/shim/service.go b/pkg/shim/service.go
index 9d9fa8ef6..1f9adcb65 100644
--- a/pkg/shim/service.go
+++ b/pkg/shim/service.go
@@ -22,6 +22,7 @@ import (
"os"
"os/exec"
"path/filepath"
+ "strings"
"sync"
"time"
@@ -44,6 +45,7 @@ import (
"github.com/containerd/containerd/sys/reaper"
"github.com/containerd/typeurl"
"github.com/gogo/protobuf/types"
+ specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
"golang.org/x/sys/unix"
"gvisor.dev/gvisor/pkg/cleanup"
@@ -944,9 +946,19 @@ func newInit(path, workDir, namespace string, platform stdio.Platform, r *proc.C
if err != nil {
return nil, fmt.Errorf("read oci spec: %w", err)
}
- if err := utils.UpdateVolumeAnnotations(r.Bundle, spec); err != nil {
+
+ updated, err := utils.UpdateVolumeAnnotations(spec)
+ if err != nil {
return nil, fmt.Errorf("update volume annotations: %w", err)
}
+ updated = updateCgroup(spec) || updated
+
+ if updated {
+ if err := utils.WriteSpec(r.Bundle, spec); err != nil {
+ return nil, err
+ }
+ }
+
runsc.FormatRunscLogPath(r.ID, options.RunscConfig)
runtime := proc.NewRunsc(options.Root, path, namespace, options.BinaryName, options.RunscConfig)
p := proc.New(r.ID, runtime, stdio.Stdio{
@@ -966,3 +978,39 @@ func newInit(path, workDir, namespace string, platform stdio.Platform, r *proc.C
p.Monitor = reaper.Default
return p, nil
}
+
+// updateCgroup updates cgroup path for the sandbox to make the sandbox join the
+// pod cgroup and not the pause container cgroup. Returns true if the spec was
+// modified. Ex.:
+// /kubepods/burstable/pod123/abc => kubepods/burstable/pod123
+//
+func updateCgroup(spec *specs.Spec) bool {
+ if !utils.IsSandbox(spec) {
+ return false
+ }
+ if spec.Linux == nil || len(spec.Linux.CgroupsPath) == 0 {
+ return false
+ }
+
+ // Search backwards for the pod cgroup path to make the sandbox use it,
+ // instead of the pause container's cgroup.
+ parts := strings.Split(spec.Linux.CgroupsPath, string(filepath.Separator))
+ for i := len(parts) - 1; i >= 0; i-- {
+ if strings.HasPrefix(parts[i], "pod") {
+ var path string
+ for j := 0; j <= i; j++ {
+ path = filepath.Join(path, parts[j])
+ }
+ // Add back the initial '/' that may have been lost above.
+ if filepath.IsAbs(spec.Linux.CgroupsPath) {
+ path = string(filepath.Separator) + path
+ }
+ if spec.Linux.CgroupsPath == path {
+ return false
+ }
+ spec.Linux.CgroupsPath = path
+ return true
+ }
+ }
+ return false
+}
diff --git a/pkg/shim/service_test.go b/pkg/shim/service_test.go
new file mode 100644
index 000000000..2d9f07e02
--- /dev/null
+++ b/pkg/shim/service_test.go
@@ -0,0 +1,121 @@
+// Copyright 2021 The gVisor Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package shim
+
+import (
+ "testing"
+
+ specs "github.com/opencontainers/runtime-spec/specs-go"
+ "gvisor.dev/gvisor/pkg/shim/utils"
+)
+
+func TestCgroupPath(t *testing.T) {
+ for _, tc := range []struct {
+ name string
+ path string
+ want string
+ }{
+ {
+ name: "simple",
+ path: "foo/pod123/container",
+ want: "foo/pod123",
+ },
+ {
+ name: "absolute",
+ path: "/foo/pod123/container",
+ want: "/foo/pod123",
+ },
+ {
+ name: "no-container",
+ path: "foo/pod123",
+ want: "foo/pod123",
+ },
+ {
+ name: "no-container-absolute",
+ path: "/foo/pod123",
+ want: "/foo/pod123",
+ },
+ {
+ name: "double-pod",
+ path: "/foo/podium/pod123/container",
+ want: "/foo/podium/pod123",
+ },
+ {
+ name: "start-pod",
+ path: "pod123/container",
+ want: "pod123",
+ },
+ {
+ name: "start-pod-absolute",
+ path: "/pod123/container",
+ want: "/pod123",
+ },
+ {
+ name: "slashes",
+ path: "///foo/////pod123//////container",
+ want: "/foo/pod123",
+ },
+ {
+ name: "no-pod",
+ path: "/foo/nopod123/container",
+ want: "/foo/nopod123/container",
+ },
+ } {
+ t.Run(tc.name, func(t *testing.T) {
+ spec := specs.Spec{
+ Linux: &specs.Linux{
+ CgroupsPath: tc.path,
+ },
+ }
+ updated := updateCgroup(&spec)
+ if spec.Linux.CgroupsPath != tc.want {
+ t.Errorf("updateCgroup(%q), want: %q, got: %q", tc.path, tc.want, spec.Linux.CgroupsPath)
+ }
+ if shouldUpdate := tc.path != tc.want; shouldUpdate != updated {
+ t.Errorf("updateCgroup(%q)=%v, want: %v", tc.path, updated, shouldUpdate)
+ }
+ })
+ }
+}
+
+// Test cases that cgroup path should not be updated.
+func TestCgroupNoUpdate(t *testing.T) {
+ for _, tc := range []struct {
+ name string
+ spec *specs.Spec
+ }{
+ {
+ name: "empty",
+ spec: &specs.Spec{},
+ },
+ {
+ name: "subcontainer",
+ spec: &specs.Spec{
+ Linux: &specs.Linux{
+ CgroupsPath: "foo/pod123/container",
+ },
+ Annotations: map[string]string{
+ utils.ContainerTypeAnnotation: utils.ContainerTypeContainer,
+ },
+ },
+ },
+ } {
+ t.Run(tc.name, func(t *testing.T) {
+ if updated := updateCgroup(tc.spec); updated {
+ t.Errorf("updateCgroup(%+v), got: %v, want: false", tc.spec.Linux, updated)
+ }
+ })
+ }
+}
diff --git a/pkg/shim/utils/annotations.go b/pkg/shim/utils/annotations.go
index 1e9d3f365..c744800bb 100644
--- a/pkg/shim/utils/annotations.go
+++ b/pkg/shim/utils/annotations.go
@@ -19,7 +19,9 @@ package utils
// These are vendor due to import conflicts.
const (
sandboxLogDirAnnotation = "io.kubernetes.cri.sandbox-log-directory"
- containerTypeAnnotation = "io.kubernetes.cri.container-type"
+ // ContainerTypeAnnotation is they key that defines sandbox or container.
+ ContainerTypeAnnotation = "io.kubernetes.cri.container-type"
containerTypeSandbox = "sandbox"
- containerTypeContainer = "container"
+ // ContainerTypeContainer is the value for container.
+ ContainerTypeContainer = "container"
)
diff --git a/pkg/shim/utils/utils.go b/pkg/shim/utils/utils.go
index 7b1cd983e..f183b1bbc 100644
--- a/pkg/shim/utils/utils.go
+++ b/pkg/shim/utils/utils.go
@@ -18,19 +18,16 @@ package utils
import (
"encoding/json"
"io/ioutil"
- "os"
"path/filepath"
specs "github.com/opencontainers/runtime-spec/specs-go"
)
+const configFilename = "config.json"
+
// ReadSpec reads OCI spec from the bundle directory.
func ReadSpec(bundle string) (*specs.Spec, error) {
- f, err := os.Open(filepath.Join(bundle, "config.json"))
- if err != nil {
- return nil, err
- }
- b, err := ioutil.ReadAll(f)
+ b, err := ioutil.ReadFile(filepath.Join(bundle, configFilename))
if err != nil {
return nil, err
}
@@ -41,9 +38,18 @@ func ReadSpec(bundle string) (*specs.Spec, error) {
return &spec, nil
}
+// WriteSpec writes OCI spec to the bundle directory.
+func WriteSpec(bundle string, spec *specs.Spec) error {
+ b, err := json.Marshal(spec)
+ if err != nil {
+ return err
+ }
+ return ioutil.WriteFile(filepath.Join(bundle, configFilename), b, 0666)
+}
+
// IsSandbox checks whether a container is a sandbox container.
func IsSandbox(spec *specs.Spec) bool {
- t, ok := spec.Annotations[containerTypeAnnotation]
+ t, ok := spec.Annotations[ContainerTypeAnnotation]
return !ok || t == containerTypeSandbox
}
diff --git a/pkg/shim/utils/volumes.go b/pkg/shim/utils/volumes.go
index cdcb88229..6bc75139d 100644
--- a/pkg/shim/utils/volumes.go
+++ b/pkg/shim/utils/volumes.go
@@ -15,9 +15,7 @@
package utils
import (
- "encoding/json"
"fmt"
- "io/ioutil"
"path/filepath"
"strings"
@@ -89,8 +87,8 @@ func isVolumePath(volume, path string) (bool, error) {
}
// UpdateVolumeAnnotations add necessary OCI annotations for gvisor
-// volume optimization.
-func UpdateVolumeAnnotations(bundle string, s *specs.Spec) error {
+// volume optimization. Returns true if the spec was modified.
+func UpdateVolumeAnnotations(s *specs.Spec) (bool, error) {
var uid string
if IsSandbox(s) {
var err error
@@ -98,7 +96,7 @@ func UpdateVolumeAnnotations(bundle string, s *specs.Spec) error {
if err != nil {
// Skip if we can't get pod UID, because this doesn't work
// for containerd 1.1.
- return nil
+ return false, nil
}
}
var updated bool
@@ -114,7 +112,7 @@ func UpdateVolumeAnnotations(bundle string, s *specs.Spec) error {
// This is a sandbox.
path, err := volumePath(volume, uid)
if err != nil {
- return fmt.Errorf("get volume path for %q: %w", volume, err)
+ return false, fmt.Errorf("get volume path for %q: %w", volume, err)
}
s.Annotations[volumeSourceKey(volume)] = path
updated = true
@@ -138,15 +136,7 @@ func UpdateVolumeAnnotations(bundle string, s *specs.Spec) error {
}
}
}
- if !updated {
- return nil
- }
- // Update bundle.
- b, err := json.Marshal(s)
- if err != nil {
- return err
- }
- return ioutil.WriteFile(filepath.Join(bundle, "config.json"), b, 0666)
+ return updated, nil
}
func changeMountType(m *specs.Mount, newType string) {
diff --git a/pkg/shim/utils/volumes_test.go b/pkg/shim/utils/volumes_test.go
index b25c53c73..5db43cdf1 100644
--- a/pkg/shim/utils/volumes_test.go
+++ b/pkg/shim/utils/volumes_test.go
@@ -15,11 +15,9 @@
package utils
import (
- "encoding/json"
"fmt"
"io/ioutil"
"os"
- "path/filepath"
"reflect"
"testing"
@@ -58,7 +56,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) {
spec: &specs.Spec{
Annotations: map[string]string{
sandboxLogDirAnnotation: testLogDirPath,
- containerTypeAnnotation: containerTypeSandbox,
+ ContainerTypeAnnotation: containerTypeSandbox,
volumeKeyPrefix + testVolumeName + ".share": "pod",
volumeKeyPrefix + testVolumeName + ".type": "tmpfs",
volumeKeyPrefix + testVolumeName + ".options": "ro",
@@ -67,7 +65,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) {
expected: &specs.Spec{
Annotations: map[string]string{
sandboxLogDirAnnotation: testLogDirPath,
- containerTypeAnnotation: containerTypeSandbox,
+ ContainerTypeAnnotation: containerTypeSandbox,
volumeKeyPrefix + testVolumeName + ".share": "pod",
volumeKeyPrefix + testVolumeName + ".type": "tmpfs",
volumeKeyPrefix + testVolumeName + ".options": "ro",
@@ -81,7 +79,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) {
spec: &specs.Spec{
Annotations: map[string]string{
sandboxLogDirAnnotation: testLegacyLogDirPath,
- containerTypeAnnotation: containerTypeSandbox,
+ ContainerTypeAnnotation: containerTypeSandbox,
volumeKeyPrefix + testVolumeName + ".share": "pod",
volumeKeyPrefix + testVolumeName + ".type": "tmpfs",
volumeKeyPrefix + testVolumeName + ".options": "ro",
@@ -90,7 +88,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) {
expected: &specs.Spec{
Annotations: map[string]string{
sandboxLogDirAnnotation: testLegacyLogDirPath,
- containerTypeAnnotation: containerTypeSandbox,
+ ContainerTypeAnnotation: containerTypeSandbox,
volumeKeyPrefix + testVolumeName + ".share": "pod",
volumeKeyPrefix + testVolumeName + ".type": "tmpfs",
volumeKeyPrefix + testVolumeName + ".options": "ro",
@@ -117,7 +115,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) {
},
},
Annotations: map[string]string{
- containerTypeAnnotation: containerTypeContainer,
+ ContainerTypeAnnotation: ContainerTypeContainer,
volumeKeyPrefix + testVolumeName + ".share": "pod",
volumeKeyPrefix + testVolumeName + ".type": "tmpfs",
volumeKeyPrefix + testVolumeName + ".options": "ro",
@@ -139,7 +137,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) {
},
},
Annotations: map[string]string{
- containerTypeAnnotation: containerTypeContainer,
+ ContainerTypeAnnotation: ContainerTypeContainer,
volumeKeyPrefix + testVolumeName + ".share": "pod",
volumeKeyPrefix + testVolumeName + ".type": "tmpfs",
volumeKeyPrefix + testVolumeName + ".options": "ro",
@@ -159,7 +157,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) {
},
},
Annotations: map[string]string{
- containerTypeAnnotation: containerTypeContainer,
+ ContainerTypeAnnotation: ContainerTypeContainer,
volumeKeyPrefix + testVolumeName + ".share": "container",
volumeKeyPrefix + testVolumeName + ".type": "bind",
volumeKeyPrefix + testVolumeName + ".options": "ro",
@@ -175,7 +173,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) {
},
},
Annotations: map[string]string{
- containerTypeAnnotation: containerTypeContainer,
+ ContainerTypeAnnotation: ContainerTypeContainer,
volumeKeyPrefix + testVolumeName + ".share": "container",
volumeKeyPrefix + testVolumeName + ".type": "bind",
volumeKeyPrefix + testVolumeName + ".options": "ro",
@@ -187,7 +185,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) {
name: "should not return error without pod log directory",
spec: &specs.Spec{
Annotations: map[string]string{
- containerTypeAnnotation: containerTypeSandbox,
+ ContainerTypeAnnotation: containerTypeSandbox,
volumeKeyPrefix + testVolumeName + ".share": "pod",
volumeKeyPrefix + testVolumeName + ".type": "tmpfs",
volumeKeyPrefix + testVolumeName + ".options": "ro",
@@ -195,7 +193,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) {
},
expected: &specs.Spec{
Annotations: map[string]string{
- containerTypeAnnotation: containerTypeSandbox,
+ ContainerTypeAnnotation: containerTypeSandbox,
volumeKeyPrefix + testVolumeName + ".share": "pod",
volumeKeyPrefix + testVolumeName + ".type": "tmpfs",
volumeKeyPrefix + testVolumeName + ".options": "ro",
@@ -207,7 +205,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) {
spec: &specs.Spec{
Annotations: map[string]string{
sandboxLogDirAnnotation: testLogDirPath,
- containerTypeAnnotation: containerTypeSandbox,
+ ContainerTypeAnnotation: containerTypeSandbox,
volumeKeyPrefix + "notexist.share": "pod",
volumeKeyPrefix + "notexist.type": "tmpfs",
volumeKeyPrefix + "notexist.options": "ro",
@@ -220,13 +218,13 @@ func TestUpdateVolumeAnnotations(t *testing.T) {
spec: &specs.Spec{
Annotations: map[string]string{
sandboxLogDirAnnotation: testLogDirPath,
- containerTypeAnnotation: containerTypeSandbox,
+ ContainerTypeAnnotation: containerTypeSandbox,
},
},
expected: &specs.Spec{
Annotations: map[string]string{
sandboxLogDirAnnotation: testLogDirPath,
- containerTypeAnnotation: containerTypeSandbox,
+ ContainerTypeAnnotation: containerTypeSandbox,
},
},
},
@@ -248,7 +246,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) {
},
},
Annotations: map[string]string{
- containerTypeAnnotation: containerTypeContainer,
+ ContainerTypeAnnotation: ContainerTypeContainer,
},
},
expected: &specs.Spec{
@@ -267,7 +265,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) {
},
},
Annotations: map[string]string{
- containerTypeAnnotation: containerTypeContainer,
+ ContainerTypeAnnotation: ContainerTypeContainer,
},
},
},
@@ -275,7 +273,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) {
name: "bind options removed",
spec: &specs.Spec{
Annotations: map[string]string{
- containerTypeAnnotation: containerTypeContainer,
+ ContainerTypeAnnotation: ContainerTypeContainer,
volumeKeyPrefix + testVolumeName + ".share": "pod",
volumeKeyPrefix + testVolumeName + ".type": "tmpfs",
volumeKeyPrefix + testVolumeName + ".options": "ro",
@@ -292,7 +290,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) {
},
expected: &specs.Spec{
Annotations: map[string]string{
- containerTypeAnnotation: containerTypeContainer,
+ ContainerTypeAnnotation: ContainerTypeContainer,
volumeKeyPrefix + testVolumeName + ".share": "pod",
volumeKeyPrefix + testVolumeName + ".type": "tmpfs",
volumeKeyPrefix + testVolumeName + ".options": "ro",
@@ -311,11 +309,7 @@ func TestUpdateVolumeAnnotations(t *testing.T) {
},
} {
t.Run(test.name, func(t *testing.T) {
- bundle, err := ioutil.TempDir(dir, "test-bundle")
- if err != nil {
- t.Fatalf("Create test bundle: %v", err)
- }
- err = UpdateVolumeAnnotations(bundle, test.spec)
+ updated, err := UpdateVolumeAnnotations(test.spec)
if test.expectErr {
if err == nil {
t.Fatal("Expected error, but got nil")
@@ -328,18 +322,8 @@ func TestUpdateVolumeAnnotations(t *testing.T) {
if !reflect.DeepEqual(test.expected, test.spec) {
t.Fatalf("Expected %+v, got %+v", test.expected, test.spec)
}
- if test.expectUpdate {
- b, err := ioutil.ReadFile(filepath.Join(bundle, "config.json"))
- if err != nil {
- t.Fatalf("Read spec from bundle: %v", err)
- }
- var spec specs.Spec
- if err := json.Unmarshal(b, &spec); err != nil {
- t.Fatalf("Unmarshal spec: %v", err)
- }
- if !reflect.DeepEqual(test.expected, &spec) {
- t.Fatalf("Expected %+v, got %+v", test.expected, &spec)
- }
+ if test.expectUpdate != updated {
+ t.Errorf("Expected %v, got %v", test.expected, updated)
}
})
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-28 01:40:43 +0000