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Code Issues Projects Releases Wiki Activity

Merge pull request #41766 from feiskyer/sysctls

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Automatic merge from submit-queue (batch tested with PRs 45826, 45747, 45548, 45606, 41766)

CRI: using typed filed for sysctls

**What this PR does / why we need it**:

CRI supports sysctls via annotations [today](https://github.com/kubernetes/kubernetes/blob/master/pkg/kubelet/api/v1alpha1/runtime/api.proto#L237), we should move them to typed and structured fields instead. (refer [here](https://github.com/kubernetes/kubernetes/issues/30819#issuecomment-253369441))

**Which issue this PR fixes** 

Part of #39130.

**Release note**:

```release-note
NONE
```
This commit is contained in:
Kubernetes Submit Queue 2017-05-15 11:39:29 -07:00 committed by GitHub
commit 1b7dacde4b
10 changed files with 435 additions and 287 deletions
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557
pkg/kubelet/apis/cri/v1alpha1/api.pb.go
View File

@ -527,6 +527,8 @@ type LinuxPodSandboxConfig struct {
CgroupParent string `protobuf:"bytes,1,opt,name=cgroup_parent,json=cgroupParent,proto3" json:"cgroup_parent,omitempty"`
// LinuxSandboxSecurityContext holds sandbox security attributes.
SecurityContext *LinuxSandboxSecurityContext `protobuf:"bytes,2,opt,name=security_context,json=securityContext" json:"security_context,omitempty"`
// Sysctls holds linux sysctls config for the sandbox.
Sysctls map[string]string `protobuf:"bytes,3,rep,name=sysctls" json:"sysctls,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"`
}
func (m *LinuxPodSandboxConfig) Reset() { *m = LinuxPodSandboxConfig{} }
@ -547,6 +549,13 @@ func (m *LinuxPodSandboxConfig) GetSecurityContext() *LinuxSandboxSecurityContex
return nil
}
func (m *LinuxPodSandboxConfig) GetSysctls() map[string]string {
if m != nil {
return m.Sysctls
}
return nil
}
// PodSandboxMetadata holds all necessary information for building the sandbox name.
// The container runtime is encouraged to expose the metadata associated with the
// PodSandbox in its user interface for better user experience. For example,
@ -662,16 +671,6 @@ type PodSandboxConfig struct {
// local seccomp profile root. Note that profile root is set in
// kubelet, and it is not passed in CRI yet, see https://issues.k8s.io/36997.
//
// 2. Sysctls
//
// key: security.alpha.kubernetes.io/sysctls
// description: list of safe sysctls which are set for the sandbox.
// value: comma separated list of sysctl_name=value key-value pairs.
//
// key: security.alpha.kubernetes.io/unsafe-sysctls
// description: list of unsafe sysctls which are set for the sandbox.
// value: comma separated list of sysctl_name=value key-value pairs.
//
Annotations map[string]string `protobuf:"bytes,7,rep,name=annotations" json:"annotations,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"`
// Optional configurations specific to Linux hosts.
Linux *LinuxPodSandboxConfig `protobuf:"bytes,8,opt,name=linux" json:"linux,omitempty"`
@ -4372,6 +4371,23 @@ func (m *LinuxPodSandboxConfig) MarshalTo(dAtA []byte) (int, error) {
}
i += n6
}
if len(m.Sysctls) > 0 {
for k := range m.Sysctls {
dAtA[i] = 0x1a
i++
v := m.Sysctls[k]
mapSize := 1 + len(k) + sovApi(uint64(len(k))) + 1 + len(v) + sovApi(uint64(len(v)))
i = encodeVarintApi(dAtA, i, uint64(mapSize))
dAtA[i] = 0xa
i++
i = encodeVarintApi(dAtA, i, uint64(len(k)))
i += copy(dAtA[i:], k)
dAtA[i] = 0x12
i++
i = encodeVarintApi(dAtA, i, uint64(len(v)))
i += copy(dAtA[i:], v)
}
}
return i, nil
}
@ -7566,6 +7582,14 @@ func (m *LinuxPodSandboxConfig) Size() (n int) {
l = m.SecurityContext.Size()
n += 1 + l + sovApi(uint64(l))
}
if len(m.Sysctls) > 0 {
for k, v := range m.Sysctls {
_ = k
_ = v
mapEntrySize := 1 + len(k) + sovApi(uint64(len(k))) + 1 + len(v) + sovApi(uint64(len(v)))
n += mapEntrySize + 1 + sovApi(uint64(mapEntrySize))
}
}
return n
}
@ -8945,9 +8969,20 @@ func (this *LinuxPodSandboxConfig) String() string {
if this == nil {
return "nil"
}
keysForSysctls := make([]string, 0, len(this.Sysctls))
for k := range this.Sysctls {
keysForSysctls = append(keysForSysctls, k)
}
github_com_gogo_protobuf_sortkeys.Strings(keysForSysctls)
mapStringForSysctls := "map[string]string{"
for _, k := range keysForSysctls {
mapStringForSysctls += fmt.Sprintf("%v: %v,", k, this.Sysctls[k])
}
mapStringForSysctls += "}"
s := strings.Join([]string{`&LinuxPodSandboxConfig{`,
`CgroupParent:` + fmt.Sprintf("%v", this.CgroupParent) + `,`,
`SecurityContext:` + strings.Replace(fmt.Sprintf("%v", this.SecurityContext), "LinuxSandboxSecurityContext", "LinuxSandboxSecurityContext", 1) + `,`,
`Sysctls:` + mapStringForSysctls + `,`,
`}`,
}, "")
return s
@ -11157,6 +11192,122 @@ func (m *LinuxPodSandboxConfig) Unmarshal(dAtA []byte) error {
return err
}
iNdEx = postIndex
case 3:
if wireType != 2 {
return fmt.Errorf("proto: wrong wireType = %d for field Sysctls", wireType)
}
var msglen int
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowApi
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
msglen |= (int(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
if msglen < 0 {
return ErrInvalidLengthApi
}
postIndex := iNdEx + msglen
if postIndex > l {
return io.ErrUnexpectedEOF
}
var keykey uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowApi
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
keykey |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
var stringLenmapkey uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowApi
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
stringLenmapkey |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
intStringLenmapkey := int(stringLenmapkey)
if intStringLenmapkey < 0 {
return ErrInvalidLengthApi
}
postStringIndexmapkey := iNdEx + intStringLenmapkey
if postStringIndexmapkey > l {
return io.ErrUnexpectedEOF
}
mapkey := string(dAtA[iNdEx:postStringIndexmapkey])
iNdEx = postStringIndexmapkey
if m.Sysctls == nil {
m.Sysctls = make(map[string]string)
}
if iNdEx < postIndex {
var valuekey uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowApi
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
valuekey |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
var stringLenmapvalue uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowApi
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
stringLenmapvalue |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
intStringLenmapvalue := int(stringLenmapvalue)
if intStringLenmapvalue < 0 {
return ErrInvalidLengthApi
}
postStringIndexmapvalue := iNdEx + intStringLenmapvalue
if postStringIndexmapvalue > l {
return io.ErrUnexpectedEOF
}
mapvalue := string(dAtA[iNdEx:postStringIndexmapvalue])
iNdEx = postStringIndexmapvalue
m.Sysctls[mapkey] = mapvalue
} else {
var mapvalue string
m.Sysctls[mapkey] = mapvalue
}
iNdEx = postIndex
default:
iNdEx = preIndex
skippy, err := skipApi(dAtA[iNdEx:])
@ -21646,12 +21797,12 @@ var (
func init() { proto.RegisterFile("api.proto", fileDescriptorApi) }
var fileDescriptorApi = []byte{
// 3756 bytes of a gzipped FileDescriptorProto
// 3782 bytes of a gzipped FileDescriptorProto
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@ -21690,196 +21841,198 @@ var fileDescriptorApi = []byte{
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0x3f, 0xad, 0xd4, 0x34, 0x00, 0x00,
}

12
pkg/kubelet/apis/cri/v1alpha1/api.proto
View File

@ -205,6 +205,8 @@ message LinuxPodSandboxConfig {
string cgroup_parent = 1;
// LinuxSandboxSecurityContext holds sandbox security attributes.
LinuxSandboxSecurityContext security_context = 2;
// Sysctls holds linux sysctls config for the sandbox.
map<string, string> sysctls = 3;
}
// PodSandboxMetadata holds all necessary information for building the sandbox name.
@ -290,16 +292,6 @@ message PodSandboxConfig {
// local seccomp profile root. Note that profile root is set in
// kubelet, and it is not passed in CRI yet, see https://issues.k8s.io/36997.
//
// 2. Sysctls
//
// key: security.alpha.kubernetes.io/sysctls
// description: list of safe sysctls which are set for the sandbox.
// value: comma separated list of sysctl_name=value key-value pairs.
//
// key: security.alpha.kubernetes.io/unsafe-sysctls
// description: list of unsafe sysctls which are set for the sandbox.
// value: comma separated list of sysctl_name=value key-value pairs.
//
map<string, string> annotations = 7;
// Optional configurations specific to Linux hosts.
LinuxPodSandboxConfig linux = 8;

1
pkg/kubelet/dockershim/BUILD
View File

@ -30,7 +30,6 @@ go_library(
tags = ["automanaged"],
deps = [
"//pkg/api/v1:go_default_library",
"//pkg/api/v1/helper:go_default_library",
"//pkg/apis/componentconfig:go_default_library",
"//pkg/client/unversioned/remotecommand:go_default_library",
"//pkg/kubelet/apis/cri:go_default_library",

10
pkg/kubelet/dockershim/docker_sandbox.go
View File

@ -477,6 +477,9 @@ func (ds *dockerService) applySandboxLinuxOptions(hc *dockercontainer.HostConfig
return err
}
// Set sysctls.
hc.Sysctls = lc.Sysctls
return nil
}
@ -508,13 +511,6 @@ func (ds *dockerService) makeSandboxDockerConfig(c *runtimeapi.PodSandboxConfig,
HostConfig: hc,
}
// Set sysctls if requested
sysctls, err := getSysctlsFromAnnotations(c.Annotations)
if err != nil {
return nil, fmt.Errorf("failed to get sysctls from annotations %v for sandbox %q: %v", c.Annotations, c.Metadata.Name, err)
}
hc.Sysctls = sysctls
// Apply linux-specific options.
if lc := c.GetLinux(); lc != nil {
if err := ds.applySandboxLinuxOptions(hc, lc, createConfig, image, securityOptSep); err != nil {

22
pkg/kubelet/dockershim/helpers.go
View File

@ -34,7 +34,6 @@ import (
"github.com/golang/glog"
"k8s.io/kubernetes/pkg/api/v1"
v1helper "k8s.io/kubernetes/pkg/api/v1/helper"
runtimeapi "k8s.io/kubernetes/pkg/kubelet/apis/cri/v1alpha1"
"k8s.io/kubernetes/pkg/kubelet/types"
"k8s.io/kubernetes/pkg/security/apparmor"
@ -274,27 +273,6 @@ func getNetworkNamespace(c *dockertypes.ContainerJSON) string {
return fmt.Sprintf(dockerNetNSFmt, c.State.Pid)
}
// getSysctlsFromAnnotations gets sysctls from annotations.
func getSysctlsFromAnnotations(annotations map[string]string) (map[string]string, error) {
var results map[string]string
sysctls, unsafeSysctls, err := v1helper.SysctlsFromPodAnnotations(annotations)
if err != nil {
return nil, err
}
if len(sysctls)+len(unsafeSysctls) > 0 {
results = make(map[string]string, len(sysctls)+len(unsafeSysctls))
for _, c := range sysctls {
results[c.Name] = c.Value
}
for _, c := range unsafeSysctls {
results[c.Name] = c.Value
}
}
return results, nil
}
// dockerFilter wraps around dockerfilters.Args and provides methods to modify
// the filter easily.
type dockerFilter struct {

40
pkg/kubelet/dockershim/helpers_test.go
View File

@ -175,46 +175,6 @@ func TestGetApparmorSecurityOpts(t *testing.T) {
}
}
// TestGetSystclsFromAnnotations tests the logic of getting sysctls from annotations.
func TestGetSystclsFromAnnotations(t *testing.T) {
tests := []struct {
annotations map[string]string
expectedSysctls map[string]string
}{{
annotations: map[string]string{
v1.SysctlsPodAnnotationKey: "kernel.shmmni=32768,kernel.shmmax=1000000000",
v1.UnsafeSysctlsPodAnnotationKey: "knet.ipv4.route.min_pmtu=1000",
},
expectedSysctls: map[string]string{
"kernel.shmmni": "32768",
"kernel.shmmax": "1000000000",
"knet.ipv4.route.min_pmtu": "1000",
},
}, {
annotations: map[string]string{
v1.SysctlsPodAnnotationKey: "kernel.shmmni=32768,kernel.shmmax=1000000000",
},
expectedSysctls: map[string]string{
"kernel.shmmni": "32768",
"kernel.shmmax": "1000000000",
},
}, {
annotations: map[string]string{
v1.UnsafeSysctlsPodAnnotationKey: "knet.ipv4.route.min_pmtu=1000",
},
expectedSysctls: map[string]string{
"knet.ipv4.route.min_pmtu": "1000",
},
}}
for i, test := range tests {
actual, err := getSysctlsFromAnnotations(test.annotations)
assert.NoError(t, err, "TestCase[%d]", i)
assert.Len(t, actual, len(test.expectedSysctls), "TestCase[%d]", i)
assert.Equal(t, test.expectedSysctls, actual, "TestCase[%d]", i)
}
}
// TestGetUserFromImageUser tests the logic of getting image uid or user name of image user.
func TestGetUserFromImageUser(t *testing.T) {
newI64 := func(i int64) *int64 { return &i }

1
pkg/kubelet/kuberuntime/BUILD
View File

@ -29,6 +29,7 @@ go_library(
deps = [
"//pkg/api:go_default_library",
"//pkg/api/v1:go_default_library",
"//pkg/api/v1/helper:go_default_library",
"//pkg/api/v1/ref:go_default_library",
"//pkg/credentialprovider:go_default_library",
"//pkg/kubelet/apis/cri:go_default_library",

19
pkg/kubelet/kuberuntime/helpers.go
View File

@ -24,6 +24,7 @@ import (
"github.com/golang/glog"
"k8s.io/apimachinery/pkg/types"
"k8s.io/kubernetes/pkg/api/v1"
v1helper "k8s.io/kubernetes/pkg/api/v1/helper"
runtimeapi "k8s.io/kubernetes/pkg/kubelet/apis/cri/v1alpha1"
kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
)
@ -236,3 +237,21 @@ func toKubeRuntimeStatus(status *runtimeapi.RuntimeStatus) *kubecontainer.Runtim
}
return &kubecontainer.RuntimeStatus{Conditions: conditions}
}
// getSysctlsFromAnnotations gets sysctls and unsafeSysctls from annotations.
func getSysctlsFromAnnotations(annotations map[string]string) (map[string]string, error) {
apiSysctls, apiUnsafeSysctls, err := v1helper.SysctlsFromPodAnnotations(annotations)
if err != nil {
return nil, err
}
sysctls := make(map[string]string)
for _, c := range apiSysctls {
sysctls[c.Name] = c.Value
}
for _, c := range apiUnsafeSysctls {
sysctls[c.Name] = c.Value
}
return sysctls, nil
}

40
pkg/kubelet/kuberuntime/helpers_test.go
View File

@ -46,3 +46,43 @@ func TestStableKey(t *testing.T) {
newKey := getStableKey(pod, container)
assert.NotEqual(t, oldKey, newKey)
}
// TestGetSystclsFromAnnotations tests the logic of getting sysctls from annotations.
func TestGetSystclsFromAnnotations(t *testing.T) {
tests := []struct {
annotations map[string]string
expectedSysctls map[string]string
}{{
annotations: map[string]string{
v1.SysctlsPodAnnotationKey: "kernel.shmmni=32768,kernel.shmmax=1000000000",
v1.UnsafeSysctlsPodAnnotationKey: "knet.ipv4.route.min_pmtu=1000",
},
expectedSysctls: map[string]string{
"kernel.shmmni": "32768",
"kernel.shmmax": "1000000000",
"knet.ipv4.route.min_pmtu": "1000",
},
}, {
annotations: map[string]string{
v1.SysctlsPodAnnotationKey: "kernel.shmmni=32768,kernel.shmmax=1000000000",
},
expectedSysctls: map[string]string{
"kernel.shmmni": "32768",
"kernel.shmmax": "1000000000",
},
}, {
annotations: map[string]string{
v1.UnsafeSysctlsPodAnnotationKey: "knet.ipv4.route.min_pmtu=1000",
},
expectedSysctls: map[string]string{
"knet.ipv4.route.min_pmtu": "1000",
},
}}
for i, test := range tests {
actualSysctls, err := getSysctlsFromAnnotations(test.annotations)
assert.NoError(t, err, "TestCase[%d]", i)
assert.Len(t, actualSysctls, len(test.expectedSysctls), "TestCase[%d]", i)
assert.Equal(t, test.expectedSysctls, actualSysctls, "TestCase[%d]", i)
}
}

20
pkg/kubelet/kuberuntime/kuberuntime_sandbox.go
View File

@ -116,18 +116,22 @@ func (m *kubeGenericRuntimeManager) generatePodSandboxConfig(pod *v1.Pod, attemp
}
}
cgroupParent := m.runtimeHelper.GetPodCgroupParent(pod)
podSandboxConfig.Linux = m.generatePodSandboxLinuxConfig(pod, cgroupParent)
if len(portMappings) > 0 {
podSandboxConfig.PortMappings = portMappings
}
lc, err := m.generatePodSandboxLinuxConfig(pod)
if err != nil {
return nil, err
}
podSandboxConfig.Linux = lc
return podSandboxConfig, nil
}
// generatePodSandboxLinuxConfig generates LinuxPodSandboxConfig from v1.Pod.
func (m *kubeGenericRuntimeManager) generatePodSandboxLinuxConfig(pod *v1.Pod, cgroupParent string) *runtimeapi.LinuxPodSandboxConfig {
func (m *kubeGenericRuntimeManager) generatePodSandboxLinuxConfig(pod *v1.Pod) (*runtimeapi.LinuxPodSandboxConfig, error) {
cgroupParent := m.runtimeHelper.GetPodCgroupParent(pod)
lc := &runtimeapi.LinuxPodSandboxConfig{
CgroupParent: cgroupParent,
SecurityContext: &runtimeapi.LinuxSandboxSecurityContext{
@ -135,6 +139,12 @@ func (m *kubeGenericRuntimeManager) generatePodSandboxLinuxConfig(pod *v1.Pod, c
},
}
sysctls, err := getSysctlsFromAnnotations(pod.Annotations)
if err != nil {
return nil, fmt.Errorf("failed to get sysctls from annotations %v for pod %q: %v", pod.Annotations, format.Pod(pod), err)
}
lc.Sysctls = sysctls
if pod.Spec.SecurityContext != nil {
sc := pod.Spec.SecurityContext
if sc.RunAsUser != nil {
@ -167,7 +177,7 @@ func (m *kubeGenericRuntimeManager) generatePodSandboxLinuxConfig(pod *v1.Pod, c
}
}
return lc
return lc, nil
}
// getKubeletSandboxes lists all (or just the running) sandboxes managed by kubelet.