Remove rktnetes code

cmd/kubelet/app/options/container_runtime.go

@@ -29,8 +29,6 @@ const (
 	// When these values are updated, also update test/e2e/framework/util.go
 	defaultPodSandboxImageName    = "k8s.gcr.io/pause"
 	defaultPodSandboxImageVersion = "3.1"
-	// From pkg/kubelet/rkt/rkt.go to avoid circular import
-	defaultRktAPIServiceEndpoint = "localhost:15441"
 )
 
 var (
@@ -54,7 +52,6 @@ func NewContainerRuntimeOptions() *config.ContainerRuntimeOptions {
 		DockerDisableSharedPID:    true,
 		PodSandboxImage:           defaultPodSandboxImage,
 		ImagePullProgressDeadline: metav1.Duration{Duration: 1 * time.Minute},
-		RktAPIEndpoint:            defaultRktAPIServiceEndpoint,
 		ExperimentalDockershim:    false,
 	}
 }

hack/.golint_failures

@@ -196,7 +196,6 @@ pkg/kubelet/prober/results
 pkg/kubelet/prober/testing
 pkg/kubelet/qos
 pkg/kubelet/remote
-pkg/kubelet/rkt
 pkg/kubelet/secret
 pkg/kubelet/server
 pkg/kubelet/server/portforward

pkg/kubelet/BUILD

@@ -74,7 +74,6 @@ go_library(
         "//pkg/kubelet/prober:go_default_library",
         "//pkg/kubelet/prober/results:go_default_library",
         "//pkg/kubelet/remote:go_default_library",
-        "//pkg/kubelet/rkt:go_default_library",
         "//pkg/kubelet/secret:go_default_library",
         "//pkg/kubelet/server:go_default_library",
         "//pkg/kubelet/server/portforward:go_default_library",
@@ -281,7 +280,6 @@ filegroup(
         "//pkg/kubelet/prober:all-srcs",
         "//pkg/kubelet/qos:all-srcs",
         "//pkg/kubelet/remote:all-srcs",
-        "//pkg/kubelet/rkt:all-srcs",
         "//pkg/kubelet/secret:all-srcs",
         "//pkg/kubelet/server:all-srcs",
         "//pkg/kubelet/stats:all-srcs",

pkg/kubelet/cadvisor/helpers_linux.go

@@ -38,8 +38,6 @@ func (i *imageFsInfoProvider) ImageFsInfoLabel() (string, error) {
 	switch i.runtime {
 	case types.DockerContainerRuntime:
 		return cadvisorfs.LabelDockerImages, nil
-	case types.RktContainerRuntime:
-		return cadvisorfs.LabelRktImages, nil
 	case types.RemoteContainerRuntime:
 		// This is a temporary workaround to get stats for cri-o from cadvisor
 		// and should be removed.

pkg/kubelet/cadvisor/util.go

@@ -75,7 +75,6 @@ func EphemeralStorageCapacityFromFsInfo(info cadvisorapi2.FsInfo) v1.ResourceLis
 // https://github.com/kubernetes/kubernetes/issues/51798
 // UsingLegacyCadvisorStats returns true if container stats are provided by cadvisor instead of through the CRI
 func UsingLegacyCadvisorStats(runtime, runtimeEndpoint string) bool {
-	return runtime == kubetypes.RktContainerRuntime ||
-		(runtime == kubetypes.DockerContainerRuntime && goruntime.GOOS == "linux") ||
+	return (runtime == kubetypes.DockerContainerRuntime && goruntime.GOOS == "linux") ||
 		runtimeEndpoint == CrioSocket
 }

pkg/kubelet/config/flags.go

@@ -67,16 +67,6 @@ type ContainerRuntimeOptions struct {
 	// CNIBinDir is the full path of the directory in which to search for
 	// CNI plugin binaries
 	CNIBinDir string
-
-	// rkt-specific options.
-
-	// rktPath is the path of rkt binary. Leave empty to use the first rkt in $PATH.
-	RktPath string
-	// rktApiEndpoint is the endpoint of the rkt API service to communicate with.
-	RktAPIEndpoint string
-	// rktStage1Image is the image to use as stage1. Local paths and
-	// http/https URLs are supported.
-	RktStage1Image string
 }
 
 func (s *ContainerRuntimeOptions) AddFlags(fs *pflag.FlagSet) {
@@ -95,17 +85,9 @@ func (s *ContainerRuntimeOptions) AddFlags(fs *pflag.FlagSet) {
 	fs.StringVar(&s.DockerEndpoint, "docker-endpoint", s.DockerEndpoint, "Use this for the docker endpoint to communicate with")
 	fs.DurationVar(&s.ImagePullProgressDeadline.Duration, "image-pull-progress-deadline", s.ImagePullProgressDeadline.Duration, "If no pulling progress is made before this deadline, the image pulling will be cancelled.")
 
-	// Network plugin settings. Shared by both docker and rkt.
+	// Network plugin settings for Docker.
 	fs.StringVar(&s.NetworkPluginName, "network-plugin", s.NetworkPluginName, "<Warning: Alpha feature> The name of the network plugin to be invoked for various events in kubelet/pod lifecycle")
 	fs.StringVar(&s.CNIConfDir, "cni-conf-dir", s.CNIConfDir, "<Warning: Alpha feature> The full path of the directory in which to search for CNI config files. Default: /etc/cni/net.d")
 	fs.StringVar(&s.CNIBinDir, "cni-bin-dir", s.CNIBinDir, "<Warning: Alpha feature> A comma-separated list of full paths of directories in which to search for CNI plugin binaries. Default: /opt/cni/bin")
 	fs.Int32Var(&s.NetworkPluginMTU, "network-plugin-mtu", s.NetworkPluginMTU, "<Warning: Alpha feature> The MTU to be passed to the network plugin, to override the default. Set to 0 to use the default 1460 MTU.")
-
-	// Rkt-specific settings.
-	fs.StringVar(&s.RktPath, "rkt-path", s.RktPath, "Path of rkt binary. Leave empty to use the first rkt in $PATH.  Only used if --container-runtime='rkt'.")
-	fs.MarkDeprecated("rkt-path", "will be removed in a future version. Rktnetes has been deprecated in favor of rktlet (https://github.com/kubernetes-incubator/rktlet).")
-	fs.StringVar(&s.RktAPIEndpoint, "rkt-api-endpoint", s.RktAPIEndpoint, "The endpoint of the rkt API service to communicate with. Only used if --container-runtime='rkt'.")
-	fs.MarkDeprecated("rkt-api-endpoint", "will be removed in a future version. Rktnetes has been deprecated in favor of rktlet (https://github.com/kubernetes-incubator/rktlet).")
-	fs.StringVar(&s.RktStage1Image, "rkt-stage1-image", s.RktStage1Image, "image to use as stage1. Local paths and http/https URLs are supported. If empty, the 'stage1.aci' in the same directory as '--rkt-path' will be used.")
-	fs.MarkDeprecated("rkt-stage1-image", "will be removed in a future version. Rktnetes has been deprecated in favor of rktlet (https://github.com/kubernetes-incubator/rktlet).")
 }

pkg/kubelet/rkt/BUILD

-package(default_visibility = ["//visibility:public"])
-
-load(
-    "@io_bazel_rules_go//go:def.bzl",
-    "go_library",
-    "go_test",
-)
-
-go_library(
-    name = "go_default_library",
-    srcs = [
-        "cap.go",
-        "config.go",
-        "container_id.go",
-        "doc.go",
-        "image.go",
-        "log.go",
-        "rkt.go",
-        "systemd.go",
-        "version.go",
-    ],
-    importpath = "k8s.io/kubernetes/pkg/kubelet/rkt",
-    deps = [
-        "//pkg/credentialprovider:go_default_library",
-        "//pkg/credentialprovider/secrets:go_default_library",
-        "//pkg/kubelet/container:go_default_library",
-        "//pkg/kubelet/events:go_default_library",
-        "//pkg/kubelet/images:go_default_library",
-        "//pkg/kubelet/leaky:go_default_library",
-        "//pkg/kubelet/lifecycle:go_default_library",
-        "//pkg/kubelet/network:go_default_library",
-        "//pkg/kubelet/network/hairpin:go_default_library",
-        "//pkg/kubelet/prober/results:go_default_library",
-        "//pkg/kubelet/types:go_default_library",
-        "//pkg/kubelet/util/format:go_default_library",
-        "//pkg/securitycontext:go_default_library",
-        "//pkg/util/parsers:go_default_library",
-        "//pkg/util/selinux:go_default_library",
-        "//pkg/util/strings:go_default_library",
-        "//pkg/util/term:go_default_library",
-        "//pkg/util/version:go_default_library",
-        "//vendor/github.com/appc/spec/schema:go_default_library",
-        "//vendor/github.com/appc/spec/schema/types:go_default_library",
-        "//vendor/github.com/coreos/go-systemd/dbus:go_default_library",
-        "//vendor/github.com/coreos/go-systemd/unit:go_default_library",
-        "//vendor/github.com/coreos/rkt/api/v1alpha:go_default_library",
-        "//vendor/github.com/docker/docker/api/types:go_default_library",
-        "//vendor/github.com/golang/glog:go_default_library",
-        "//vendor/google.golang.org/grpc:go_default_library",
-        "//vendor/k8s.io/api/core/v1:go_default_library",
-        "//vendor/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
-        "//vendor/k8s.io/apimachinery/pkg/types:go_default_library",
-        "//vendor/k8s.io/apimachinery/pkg/util/errors:go_default_library",
-        "//vendor/k8s.io/apimachinery/pkg/util/uuid:go_default_library",
-        "//vendor/k8s.io/apimachinery/pkg/util/wait:go_default_library",
-        "//vendor/k8s.io/client-go/tools/record:go_default_library",
-        "//vendor/k8s.io/client-go/tools/remotecommand:go_default_library",
-        "//vendor/k8s.io/client-go/util/flowcontrol:go_default_library",
-        "//vendor/k8s.io/utils/exec:go_default_library",
-    ],
-)
-
-go_test(
-    name = "go_default_test",
-    srcs = [
-        "fake_rkt_interface_test.go",
-        "rkt_test.go",
-    ],
-    embed = [":go_default_library"],
-    deps = [
-        "//pkg/kubelet/container:go_default_library",
-        "//pkg/kubelet/container/testing:go_default_library",
-        "//pkg/kubelet/lifecycle:go_default_library",
-        "//pkg/kubelet/network:go_default_library",
-        "//pkg/kubelet/network/kubenet:go_default_library",
-        "//pkg/kubelet/network/testing:go_default_library",
-        "//pkg/kubelet/types:go_default_library",
-        "//vendor/github.com/appc/spec/schema:go_default_library",
-        "//vendor/github.com/appc/spec/schema/types:go_default_library",
-        "//vendor/github.com/coreos/go-systemd/dbus:go_default_library",
-        "//vendor/github.com/coreos/go-systemd/unit:go_default_library",
-        "//vendor/github.com/coreos/rkt/api/v1alpha:go_default_library",
-        "//vendor/github.com/golang/mock/gomock:go_default_library",
-        "//vendor/github.com/stretchr/testify/assert:go_default_library",
-        "//vendor/google.golang.org/grpc:go_default_library",
-        "//vendor/k8s.io/api/core/v1:go_default_library",
-        "//vendor/k8s.io/apimachinery/pkg/api/resource:go_default_library",
-        "//vendor/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
-        "//vendor/k8s.io/apimachinery/pkg/types:go_default_library",
-        "//vendor/k8s.io/apimachinery/pkg/util/errors:go_default_library",
-        "//vendor/k8s.io/client-go/util/testing:go_default_library",
-        "//vendor/k8s.io/utils/exec:go_default_library",
-        "//vendor/k8s.io/utils/exec/testing:go_default_library",
-    ],
-)
-
-filegroup(
-    name = "package-srcs",
-    srcs = glob(["**"]),
-    tags = ["automanaged"],
-    visibility = ["//visibility:private"],
-)
-
-filegroup(
-    name = "all-srcs",
-    srcs = [":package-srcs"],
-    tags = ["automanaged"],
-)

pkg/kubelet/rkt/OWNERS

-approvers:
-- euank
-- yifan-gu

pkg/kubelet/rkt/cap.go

-/*
-Copyright 2015 The Kubernetes 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
-
-    http://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 rkt
-
-// TODO(yifan): Export this to higher level package.
-const (
-	CAP_CHOWN = iota
-	CAP_DAC_OVERRIDE
-	CAP_DAC_READ_SEARCH
-	CAP_FOWNER
-	CAP_FSETID
-	CAP_KILL
-	CAP_SETGID
-	CAP_SETUID
-	CAP_SETPCAP
-	CAP_LINUX_IMMUTABLE
-	CAP_NET_BIND_SERVICE
-	CAP_NET_BROADCAST
-	CAP_NET_ADMIN
-	CAP_NET_RAW
-	CAP_IPC_LOCK
-	CAP_IPC_OWNER
-	CAP_SYS_MODULE
-	CAP_SYS_RAWIO
-	CAP_SYS_CHROOT
-	CAP_SYS_PTRACE
-	CAP_SYS_PACCT
-	CAP_SYS_ADMIN
-	CAP_SYS_BOOT
-	CAP_SYS_NICE
-	CAP_SYS_RESOURCE
-	CAP_SYS_TIME
-	CAP_SYS_TTY_CONFIG
-	CAP_MKNOD
-	CAP_LEASE
-	CAP_AUDIT_WRITE
-	CAP_AUDIT_CONTROL
-	CAP_SETFCAP
-	CAP_MAC_OVERRIDE
-	CAP_MAC_ADMIN
-	CAP_SYSLOG
-	CAP_WAKE_ALARM
-	CAP_BLOCK_SUSPEND
-	CAP_AUDIT_READ
-)
-
-// TODO(yifan): Export this to higher level package.
-var capabilityList = map[int]string{
-	CAP_CHOWN:            "CAP_CHOWN",
-	CAP_DAC_OVERRIDE:     "CAP_DAC_OVERRIDE",
-	CAP_DAC_READ_SEARCH:  "CAP_DAC_READ_SEARCH",
-	CAP_FOWNER:           "CAP_FOWNER",
-	CAP_FSETID:           "CAP_FSETID",
-	CAP_KILL:             "CAP_KILL",
-	CAP_SETGID:           "CAP_SETGID",
-	CAP_SETUID:           "CAP_SETUID",
-	CAP_SETPCAP:          "CAP_SETPCAP",
-	CAP_LINUX_IMMUTABLE:  "CAP_LINUX_IMMUTABLE",
-	CAP_NET_BIND_SERVICE: "CAP_NET_BIND_SERVICE",
-	CAP_NET_BROADCAST:    "CAP_NET_BROADCAST",
-	CAP_NET_ADMIN:        "CAP_NET_ADMIN",
-	CAP_NET_RAW:          "CAP_NET_RAW",
-	CAP_IPC_LOCK:         "CAP_IPC_LOCK",
-	CAP_IPC_OWNER:        "CAP_IPC_OWNER",
-	CAP_SYS_MODULE:       "CAP_SYS_MODULE",
-	CAP_SYS_RAWIO:        "CAP_SYS_RAWIO",
-	CAP_SYS_CHROOT:       "CAP_SYS_CHROOT",
-	CAP_SYS_PTRACE:       "CAP_SYS_PTRACE",
-	CAP_SYS_PACCT:        "CAP_SYS_PACCT",
-	CAP_SYS_ADMIN:        "CAP_SYS_ADMIN",
-	CAP_SYS_BOOT:         "CAP_SYS_BOOT",
-	CAP_SYS_NICE:         "CAP_SYS_NICE",
-	CAP_SYS_RESOURCE:     "CAP_SYS_RESOURCE",
-	CAP_SYS_TIME:         "CAP_SYS_TIME",
-	CAP_SYS_TTY_CONFIG:   "CAP_SYS_TTY_CONFIG",
-	CAP_MKNOD:            "CAP_MKNOD",
-	CAP_LEASE:            "CAP_LEASE",
-	CAP_AUDIT_WRITE:      "CAP_AUDIT_WRITE",
-	CAP_AUDIT_CONTROL:    "CAP_AUDIT_CONTROL",
-	CAP_SETFCAP:          "CAP_SETFCAP",
-	CAP_MAC_OVERRIDE:     "CAP_MAC_OVERRIDE",
-	CAP_MAC_ADMIN:        "CAP_MAC_ADMIN",
-	CAP_SYSLOG:           "CAP_SYSLOG",
-	CAP_WAKE_ALARM:       "CAP_WAKE_ALARM",
-	CAP_BLOCK_SUSPEND:    "CAP_BLOCK_SUSPEND",
-	CAP_AUDIT_READ:       "CAP_AUDIT_READ",
-}
-
-// allCapabilities returns the capability list with all capabilities.
-func allCapabilities() []string {
-	var capabilities []string
-	for _, cap := range capabilityList {
-		capabilities = append(capabilities, cap)
-	}
-	return capabilities
-}

pkg/kubelet/rkt/config.go

-/*
-Copyright 2015 The Kubernetes 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
-
-    http://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 rkt
-
-import (
-	"context"
-	"fmt"
-
-	rktapi "github.com/coreos/rkt/api/v1alpha"
-)
-
-// Config stores the global configuration for the rkt runtime.
-// Detailed documents can be found at:
-// https://github.com/coreos/rkt/blob/master/Documentation/commands.md#global-options
-type Config struct {
-	// The absolute path to the binary, or leave empty to find it in $PATH.
-	Path string
-	// The rkt data directory.
-	Dir string
-	// The image to use as stage1.
-	Stage1Image string
-	// The debug flag for rkt.
-	Debug bool
-	// Comma-separated list of security features to disable.
-	// Allowed values: "none", "image", "tls", "ondisk", "http", "all".
-	InsecureOptions string
-	// The local config directory.
-	LocalConfigDir string
-	// The user config directory.
-	UserConfigDir string
-	// The system config directory.
-	SystemConfigDir string
-}
-
-// buildGlobalOptions returns an array of global command line options.
-func (c *Config) buildGlobalOptions() []string {
-	var result []string
-	if c == nil {
-		return result
-	}
-
-	if c.Debug {
-		result = append(result, "--debug=true")
-	}
-	if c.InsecureOptions != "" {
-		result = append(result, fmt.Sprintf("--insecure-options=%s", c.InsecureOptions))
-	}
-	if c.LocalConfigDir != "" {
-		result = append(result, fmt.Sprintf("--local-config=%s", c.LocalConfigDir))
-	}
-	if c.UserConfigDir != "" {
-		result = append(result, fmt.Sprintf("--user-config=%s", c.UserConfigDir))
-	}
-	if c.SystemConfigDir != "" {
-		result = append(result, fmt.Sprintf("--system-config=%s", c.SystemConfigDir))
-	}
-	if c.Dir != "" {
-		result = append(result, fmt.Sprintf("--dir=%s", c.Dir))
-	}
-	return result
-}
-
-// getConfig gets configurations from the rkt API service
-// and merge it with the existing config. The merge rule is
-// that the fields in the provided config will override the
-// result that get from the rkt api service.
-func (r *Runtime) getConfig(cfg *Config) (*Config, error) {
-	ctx, cancel := context.WithTimeout(context.Background(), r.requestTimeout)
-	defer cancel()
-	resp, err := r.apisvc.GetInfo(ctx, &rktapi.GetInfoRequest{})
-	if err != nil {
-		return nil, err
-	}
-
-	flags := resp.Info.GlobalFlags
-
-	if flags.Dir != "" {
-		cfg.Dir = flags.Dir
-	}
-	if flags.LocalConfigDir != "" {
-		cfg.LocalConfigDir = flags.LocalConfigDir
-	}
-	if flags.UserConfigDir != "" {
-		cfg.UserConfigDir = flags.UserConfigDir
-	}
-	if flags.SystemConfigDir != "" {
-		cfg.SystemConfigDir = flags.SystemConfigDir
-	}
-	if flags.InsecureFlags != "" {
-		cfg.InsecureOptions = fmt.Sprintf("%s,%s", cfg.InsecureOptions, flags.InsecureFlags)
-	}
-
-	return cfg, nil
-}

pkg/kubelet/rkt/container_id.go

-/*
-Copyright 2015 The Kubernetes 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
-
-    http://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 rkt
-
-import (
-	"fmt"
-	"strings"
-
-	kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
-)
-
-// containerID defines the ID of rkt containers, it will
-// be returned to kubelet, and kubelet will use this for
-// container level operations.
-type containerID struct {
-	uuid    string // rkt uuid of the pod.
-	appName string // Name of the app in that pod.
-}
-
-// buildContainerID constructs the containers's ID using containerID,
-// which consists of the pod uuid and the container name.
-// The result can be used to uniquely identify a container.
-func buildContainerID(c *containerID) kubecontainer.ContainerID {
-	return kubecontainer.ContainerID{
-		Type: RktType,
-		ID:   fmt.Sprintf("%s:%s", c.uuid, c.appName),
-	}
-}
-
-// parseContainerID parses the containerID into pod uuid and the container name. The
-// results can be used to get more information of the container.
-func parseContainerID(id kubecontainer.ContainerID) (*containerID, error) {
-	tuples := strings.Split(id.ID, ":")
-	if len(tuples) != 2 {
-		return nil, fmt.Errorf("rkt: cannot parse container ID for: %q, required format is [UUID:APPNAME]", id)
-	}
-	return &containerID{
-		uuid:    tuples[0],
-		appName: tuples[1],
-	}, nil
-}

pkg/kubelet/rkt/doc.go

-/*
-Copyright 2015 The Kubernetes 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
-
-    http://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 rkt contains the Containerruntime interface implementation for rkt.
-package rkt // import "k8s.io/kubernetes/pkg/kubelet/rkt"

pkg/kubelet/rkt/fake_rkt_interface_test.go

-/*
-Copyright 2015 The Kubernetes 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
-
-    http://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 rkt
-
-import (
-	"context"
-	"fmt"
-	"strconv"
-	"strings"
-	"sync"
-
-	"github.com/coreos/go-systemd/dbus"
-	rktapi "github.com/coreos/rkt/api/v1alpha"
-	"google.golang.org/grpc"
-	"k8s.io/apimachinery/pkg/types"
-	kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
-)
-
-// fakeRktInterface mocks the rktapi.PublicAPIClient interface for testing purpose.
-type fakeRktInterface struct {
-	sync.Mutex
-	info       rktapi.Info
-	images     []*rktapi.Image
-	podFilters []*rktapi.PodFilter
-	pods       []*rktapi.Pod
-	called     []string
-	err        error
-}
-
-func newFakeRktInterface() *fakeRktInterface {
-	return &fakeRktInterface{}
-}
-
-func (f *fakeRktInterface) CleanCalls() {
-	f.Lock()
-	defer f.Unlock()
-	f.called = nil
-}
-
-func (f *fakeRktInterface) GetInfo(ctx context.Context, in *rktapi.GetInfoRequest, opts ...grpc.CallOption) (*rktapi.GetInfoResponse, error) {
-	f.Lock()
-	defer f.Unlock()
-
-	f.called = append(f.called, "GetInfo")
-	return &rktapi.GetInfoResponse{Info: &f.info}, f.err
-}
-
-func (f *fakeRktInterface) ListPods(ctx context.Context, in *rktapi.ListPodsRequest, opts ...grpc.CallOption) (*rktapi.ListPodsResponse, error) {
-	f.Lock()
-	defer f.Unlock()
-
-	f.called = append(f.called, "ListPods")
-	f.podFilters = in.Filters
-	return &rktapi.ListPodsResponse{Pods: f.pods}, f.err
-}
-
-func (f *fakeRktInterface) InspectPod(ctx context.Context, in *rktapi.InspectPodRequest, opts ...grpc.CallOption) (*rktapi.InspectPodResponse, error) {
-	f.Lock()
-	defer f.Unlock()
-
-	f.called = append(f.called, "InspectPod")
-	for _, pod := range f.pods {
-		if pod.Id == in.Id {
-			return &rktapi.InspectPodResponse{Pod: pod}, f.err
-		}
-	}
-	return &rktapi.InspectPodResponse{}, fmt.Errorf("pod %q not found", in.Id)
-}
-
-func (f *fakeRktInterface) ListImages(ctx context.Context, in *rktapi.ListImagesRequest, opts ...grpc.CallOption) (*rktapi.ListImagesResponse, error) {
-	f.Lock()
-	defer f.Unlock()
-
-	f.called = append(f.called, "ListImages")
-	return &rktapi.ListImagesResponse{Images: f.images}, f.err
-}
-
-func (f *fakeRktInterface) InspectImage(ctx context.Context, in *rktapi.InspectImageRequest, opts ...grpc.CallOption) (*rktapi.InspectImageResponse, error) {
-	return nil, fmt.Errorf("Not implemented")
-}
-
-func (f *fakeRktInterface) ListenEvents(ctx context.Context, in *rktapi.ListenEventsRequest, opts ...grpc.CallOption) (rktapi.PublicAPI_ListenEventsClient, error) {
-	return nil, fmt.Errorf("Not implemented")
-}
-
-func (f *fakeRktInterface) GetLogs(ctx context.Context, in *rktapi.GetLogsRequest, opts ...grpc.CallOption) (rktapi.PublicAPI_GetLogsClient, error) {
-	return nil, fmt.Errorf("Not implemented")
-}
-
-// fakeSystemd mocks the systemdInterface for testing purpose.
-// TODO(yifan): Remove this once we have a package for launching rkt pods.
-// See https://github.com/coreos/rkt/issues/1769.
-type fakeSystemd struct {
-	sync.Mutex
-	called           []string
-	resetFailedUnits []string
-	version          string
-	err              error
-}
-
-func newFakeSystemd() *fakeSystemd {
-	return &fakeSystemd{}
-}
-
-func (f *fakeSystemd) CleanCalls() {
-	f.Lock()
-	defer f.Unlock()
-	f.called = nil
-}
-
-func (f *fakeSystemd) Version() (systemdVersion, error) {
-	f.Lock()
-	defer f.Unlock()
-
-	f.called = append(f.called, "Version")
-	v, _ := strconv.Atoi(f.version)
-	return systemdVersion(v), f.err
-}
-
-func (f *fakeSystemd) ListUnits() ([]dbus.UnitStatus, error) {
-	return nil, fmt.Errorf("Not implemented")
-}
-
-func (f *fakeSystemd) StopUnit(name string, mode string, ch chan<- string) (int, error) {
-	return 0, fmt.Errorf("Not implemented")
-}
-
-func (f *fakeSystemd) RestartUnit(name string, mode string, ch chan<- string) (int, error) {
-	return 0, fmt.Errorf("Not implemented")
-}
-
-func (f *fakeSystemd) ResetFailedUnit(name string) error {
-	f.called = append(f.called, "ResetFailedUnit")
-	f.resetFailedUnits = append(f.resetFailedUnits, name)
-	return f.err
-}
-
-type fakeRktCli struct {
-	sync.Mutex
-	cmds   []string
-	result []string
-	err    error
-}
-
-func newFakeRktCli() *fakeRktCli {
-	return &fakeRktCli{
-		cmds:   []string{},
-		result: []string{},
-	}
-}
-
-func (f *fakeRktCli) RunCommand(config *Config, args ...string) (result []string, err error) {
-	f.Lock()
-	defer f.Unlock()
-	cmd := append([]string{"rkt"}, args...)
-	f.cmds = append(f.cmds, strings.Join(cmd, " "))
-	return f.result, f.err
-}
-
-func (f *fakeRktCli) Reset() {
-	f.cmds = []string{}
-	f.result = []string{}
-	f.err = nil
-}
-
-type fakePodDeletionProvider struct {
-	pods map[types.UID]struct{}
-}
-
-func newFakePodDeletionProvider() *fakePodDeletionProvider {
-	return &fakePodDeletionProvider{
-		pods: make(map[types.UID]struct{}),
-	}
-}
-
-func (f *fakePodDeletionProvider) IsPodDeleted(uid types.UID) bool {
-	_, found := f.pods[uid]
-	return !found
-}
-
-type fakeUnitGetter struct {
-	networkNamespace kubecontainer.ContainerID
-}
-
-func newfakeUnitGetter() *fakeUnitGetter {
-	return &fakeUnitGetter{
-		networkNamespace: kubecontainer.ContainerID{},
-	}
-}
-
-func (f *fakeUnitGetter) getNetworkNamespace(uid types.UID, latestPod *rktapi.Pod) (kubecontainer.ContainerID, error) {
-	return kubecontainer.ContainerID{ID: "42"}, nil
-}
-
-func (f *fakeUnitGetter) getKubernetesDirective(serviceFilePath string) (podServiceDirective, error) {
-	podService := podServiceDirective{
-		id:               "fake",
-		name:             "fake",
-		namespace:        "fake",
-		hostNetwork:      true,
-		networkNamespace: kubecontainer.ContainerID{ID: "42"},
-	}
-	return podService, nil
-}

pkg/kubelet/rkt/image.go

-/*
-Copyright 2015 The Kubernetes 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
-
-    http://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.
-*/
-
-// This file contains all image related functions for rkt runtime.
-package rkt
-
-import (
-	"context"
-	"encoding/json"
-	"fmt"
-	"io/ioutil"
-	"os"
-	"path"
-	"path/filepath"
-	"sort"
-	"strings"
-
-	appcschema "github.com/appc/spec/schema"
-	appctypes "github.com/appc/spec/schema/types"
-	rktapi "github.com/coreos/rkt/api/v1alpha"
-	dockertypes "github.com/docker/docker/api/types"
-	"github.com/golang/glog"
-
-	"k8s.io/api/core/v1"
-	"k8s.io/kubernetes/pkg/credentialprovider"
-	credentialprovidersecrets "k8s.io/kubernetes/pkg/credentialprovider/secrets"
-	kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
-	"k8s.io/kubernetes/pkg/util/parsers"
-)
-
-// PullImage invokes 'rkt fetch' to download an aci.
-// TODO(yifan): Now we only support docker images, this should be changed
-// once the format of image is landed, see:
-//
-// http://issue.k8s.io/7203
-//
-func (r *Runtime) PullImage(image kubecontainer.ImageSpec, pullSecrets []v1.Secret) (string, error) {
-	img := image.Image
-	// TODO(yifan): The credential operation is a copy from dockertools package,
-	// Need to resolve the code duplication.
-	repoToPull, _, _, err := parsers.ParseImageName(img)
-	if err != nil {
-		return "", err
-	}
-
-	keyring, err := credentialprovidersecrets.MakeDockerKeyring(pullSecrets, r.dockerKeyring)
-	if err != nil {
-		return "", err
-	}
-
-	creds, ok := keyring.Lookup(repoToPull)
-	if !ok {
-		glog.V(1).Infof("Pulling image %s without credentials", img)
-	}
-
-	userConfigDir, err := ioutil.TempDir("", "rktnetes-user-config-dir-")
-	if err != nil {
-		return "", fmt.Errorf("rkt: Cannot create a temporary user-config directory: %v", err)
-	}
-	defer os.RemoveAll(userConfigDir)
-
-	config := *r.config
-	config.UserConfigDir = userConfigDir
-
-	if err := r.writeDockerAuthConfig(img, creds, userConfigDir); err != nil {
-		return "", err
-	}
-
-	// Today, `--no-store` will fetch the remote image regardless of whether the content of the image
-	// has changed or not. This causes performance downgrades when the image tag is ':latest' and
-	// the image pull policy is 'always'. The issue is tracked in https://github.com/coreos/rkt/issues/2937.
-	if _, err := r.cli.RunCommand(&config, "fetch", "--no-store", dockerPrefix+img); err != nil {
-		glog.Errorf("Failed to fetch: %v", err)
-		return "", err
-	}
-	return r.getImageID(img)
-}
-
-func (r *Runtime) GetImageRef(image kubecontainer.ImageSpec) (string, error) {
-	images, err := r.listImages(image.Image, false)
-	if err != nil {
-		return "", err
-	}
-	if len(images) == 0 {
-		return "", nil
-	}
-	return images[0].Id, nil
-}
-
-// ListImages lists all the available appc images on the machine by invoking 'rkt image list'.
-func (r *Runtime) ListImages() ([]kubecontainer.Image, error) {
-	ctx, cancel := context.WithTimeout(context.Background(), r.requestTimeout)
-	defer cancel()
-	listResp, err := r.apisvc.ListImages(ctx, &rktapi.ListImagesRequest{})
-	if err != nil {
-		return nil, fmt.Errorf("couldn't list images: %v", err)
-	}
-
-	images := make([]kubecontainer.Image, len(listResp.Images))
-	for i, image := range listResp.Images {
-		images[i] = kubecontainer.Image{
-			ID:       image.Id,
-			RepoTags: []string{buildImageName(image)},
-			Size:     image.Size,
-		}
-	}
-	return images, nil
-}
-
-// RemoveImage removes an on-disk image using 'rkt image rm'.
-func (r *Runtime) RemoveImage(image kubecontainer.ImageSpec) error {
-	imageID, err := r.getImageID(image.Image)
-	if err != nil {
-		return err
-	}
-	if _, err := r.cli.RunCommand(nil, "image", "rm", imageID); err != nil {
-		return err
-	}
-	return nil
-}
-
-// buildImageName constructs the image name for kubecontainer.Image.
-// If the annotations contain the docker2aci metadata for this image, those are
-// used instead as they may be more accurate in some cases, namely if a
-// non-appc valid character is present
-func buildImageName(img *rktapi.Image) string {
-	registry := ""
-	repository := ""
-	for _, anno := range img.Annotations {
-		if anno.Key == appcDockerRegistryURL {
-			registry = anno.Value
-		}
-		if anno.Key == appcDockerRepository {
-			repository = anno.Value
-		}
-	}
-	if registry != "" && repository != "" {
-		// TODO(euank): This could do the special casing for dockerhub and library images
-		return fmt.Sprintf("%s/%s:%s", registry, repository, img.Version)
-	}
-
-	return fmt.Sprintf("%s:%s", img.Name, img.Version)
-}
-
-// getImageID tries to find the image ID for the given image name.
-// imageName should be in the form of 'name[:version]', e.g., 'example.com/app:latest'.
-// The name should matches the result of 'rkt image list'. If the version is empty,
-// then 'latest' is assumed.
-func (r *Runtime) getImageID(imageName string) (string, error) {
-	images, err := r.listImages(imageName, false)
-	if err != nil {
-		return "", err
-	}
-	if len(images) == 0 {
-		return "", fmt.Errorf("cannot find the image %q", imageName)
-	}
-	return images[0].Id, nil
-}
-
-type sortByImportTime []*rktapi.Image
-
-func (s sortByImportTime) Len() int           { return len(s) }
-func (s sortByImportTime) Swap(i, j int)      { s[i], s[j] = s[j], s[i] }
-func (s sortByImportTime) Less(i, j int) bool { return s[i].ImportTimestamp < s[j].ImportTimestamp }
-
-// listImages lists the images that have the given name. If detail is true,
-// then image manifest is also included in the result.
-// Note that there could be more than one images that have the given name, we
-// will return the result reversely sorted by the import time, so that the latest
-// image comes first.
-func (r *Runtime) listImages(image string, detail bool) ([]*rktapi.Image, error) {
-	repoToPull, tag, _, err := parsers.ParseImageName(image)
-	if err != nil {
-		return nil, err
-	}
-
-	imageFilters := []*rktapi.ImageFilter{
-		{
-			// TODO(yifan): Add a field in the ImageFilter to match the whole name,
-			// not just keywords.
-			// https://github.com/coreos/rkt/issues/1872#issuecomment-166456938
-			Keywords: []string{repoToPull},
-			Labels:   []*rktapi.KeyValue{{Key: "version", Value: tag}},
-		},
-	}
-
-	// If the repo name is not a valid ACIdentifier (namely if it has a port),
-	// then it will have a different name in the store. Search for both the
-	// original name and this modified name in case we choose to also change the
-	// api-service to do this un-conversion on its end.
-	if appcRepoToPull, err := appctypes.SanitizeACIdentifier(repoToPull); err != nil {
-		glog.Warningf("could not convert %v to an aci identifier: %v", err)
-	} else {
-		imageFilters = append(imageFilters, &rktapi.ImageFilter{
-			Keywords: []string{appcRepoToPull},
-			Labels:   []*rktapi.KeyValue{{Key: "version", Value: tag}},
-		})
-	}
-
-	ctx, cancel := context.WithTimeout(context.Background(), r.requestTimeout)
-	defer cancel()
-	listResp, err := r.apisvc.ListImages(ctx, &rktapi.ListImagesRequest{
-		Detail:  detail,
-		Filters: imageFilters,
-	})
-	if err != nil {
-		return nil, fmt.Errorf("couldn't list images: %v", err)
-	}
-
-	// TODO(yifan): Let the API service to sort the result:
-	// See https://github.com/coreos/rkt/issues/1911.
-	sort.Sort(sort.Reverse(sortByImportTime(listResp.Images)))
-	return listResp.Images, nil
-}
-
-// getImageManifest retrieves the image manifest for the given image.
-func (r *Runtime) getImageManifest(image string) (*appcschema.ImageManifest, error) {
-	var manifest appcschema.ImageManifest
-
-	images, err := r.listImages(image, true)
-	if err != nil {
-		return nil, err
-	}
-	if len(images) == 0 {
-		return nil, fmt.Errorf("cannot find the image %q", image)
-	}
-
-	return &manifest, json.Unmarshal(images[0].Manifest, &manifest)
-}
-
-// TODO(yifan): This is very racy, inefficient, and unsafe, we need to provide
-// different namespaces. See: https://github.com/coreos/rkt/issues/836.
-func (r *Runtime) writeDockerAuthConfig(image string, credsSlice []credentialprovider.LazyAuthConfiguration, userConfigDir string) error {
-	if len(credsSlice) == 0 {
-		return nil
-	}
-
-	creds := dockertypes.AuthConfig{}
-	// TODO handle multiple creds
-	if len(credsSlice) >= 1 {
-		creds = credentialprovider.LazyProvide(credsSlice[0])
-	}
-
-	registry := "index.docker.io"
-	// Image spec: [<registry>/]<repository>/<image>[:<version]
-	explicitRegistry := (strings.Count(image, "/") == 2)
-	if explicitRegistry {
-		registry = strings.Split(image, "/")[0]
-	}
-
-	authDir := filepath.Join(userConfigDir, "auth.d")
-	if _, err := os.Stat(authDir); os.IsNotExist(err) {
-		if err := os.MkdirAll(authDir, 0600); err != nil {
-			glog.Errorf("rkt: Cannot create auth dir: %v", err)
-			return err
-		}
-	}
-
-	config := fmt.Sprintf(dockerAuthTemplate, registry, creds.Username, creds.Password)
-	if err := ioutil.WriteFile(path.Join(authDir, registry+".json"), []byte(config), 0600); err != nil {
-		glog.Errorf("rkt: Cannot write docker auth config file: %v", err)
-		return err
-	}
-	return nil
-}
-
-// ImageStats returns the image stat (total storage bytes).
-func (r *Runtime) ImageStats() (*kubecontainer.ImageStats, error) {
-	var imageStat kubecontainer.ImageStats
-	ctx, cancel := context.WithTimeout(context.Background(), r.requestTimeout)
-	defer cancel()
-	listResp, err := r.apisvc.ListImages(ctx, &rktapi.ListImagesRequest{})
-	if err != nil {
-		return nil, fmt.Errorf("couldn't list images: %v", err)
-	}
-
-	for _, image := range listResp.Images {
-		imageStat.TotalStorageBytes = imageStat.TotalStorageBytes + uint64(image.Size)
-	}
-	return &imageStat, nil
-}

pkg/kubelet/rkt/log.go

-/*
-Copyright 2015 The Kubernetes 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
-
-    http://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 rkt
-
-import (
-	"context"
-	"fmt"
-	"io"
-	"strings"
-	"time"
-
-	"github.com/golang/glog"
-
-	rktapi "github.com/coreos/rkt/api/v1alpha"
-	"k8s.io/api/core/v1"
-	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
-	kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
-	"k8s.io/kubernetes/pkg/kubelet/util/format"
-)
-
-const (
-	journalTimestampLayout = "2006-01-02 15:04:05 -0700 MST"
-)
-
-// processLines write the lines into stdout in the required format.
-func processLines(lines []string, logOptions *v1.PodLogOptions, stdout, stderr io.Writer) {
-	msgKey := "MESSAGE="
-
-	for _, line := range lines {
-		msgStart := strings.Index(line, msgKey)
-		if msgStart < 0 {
-			glog.Warningf("rkt: Invalid log line %q, missing %q", line, msgKey)
-			continue
-		}
-
-		tss := strings.TrimSpace(line[:msgStart])
-		msg := strings.TrimPrefix(line[msgStart:], msgKey)
-
-		t, err := time.Parse(journalTimestampLayout, tss)
-		if err != nil {
-			glog.Warningf("rkt: Failed to parse the timestamp %q: %v", tss, err)
-			continue
-		}
-
-		var result string
-		if logOptions.Timestamps {
-			result = fmt.Sprintf("%s %s\n", t.Format(time.RFC3339), msg)
-		} else {
-			result = fmt.Sprintf("%s\n", msg)
-		}
-
-		if _, err := io.WriteString(stdout, result); err != nil {
-			glog.Warningf("rkt: Cannot write log line %q to output: %v", result, err)
-		}
-	}
-}
-
-// GetContainerLogs uses rkt's GetLogs API to get the logs of the container.
-// By default, it returns a snapshot of the container log. Set |follow| to true to
-// stream the log. Set |follow| to false and specify the number of lines (e.g.
-// "100" or "all") to tail the log.
-//
-// TODO(yifan): This doesn't work with lkvm stage1 yet.
-func (r *Runtime) GetContainerLogs(pod *v1.Pod, containerID kubecontainer.ContainerID, logOptions *v1.PodLogOptions, stdout, stderr io.Writer) error {
-	id, err := parseContainerID(containerID)
-	if err != nil {
-		return err
-	}
-
-	var since int64
-	if logOptions.SinceSeconds != nil {
-		t := metav1.Now().Add(-time.Duration(*logOptions.SinceSeconds) * time.Second)
-		since = t.Unix()
-	}
-	if logOptions.SinceTime != nil {
-		since = logOptions.SinceTime.Unix()
-	}
-
-	getLogsRequest := &rktapi.GetLogsRequest{
-		PodId:     id.uuid,
-		AppName:   id.appName,
-		Follow:    logOptions.Follow,
-		SinceTime: since,
-	}
-
-	if logOptions.TailLines != nil {
-		getLogsRequest.Lines = int32(*logOptions.TailLines)
-	}
-
-	stream, err := r.apisvc.GetLogs(context.Background(), getLogsRequest)
-	if err != nil {
-		glog.Errorf("rkt: Failed to create log stream for pod %q: %v", format.Pod(pod), err)
-		return err
-	}
-
-	for {
-		log, err := stream.Recv()
-		if err == io.EOF {
-			break
-		}
-		if err != nil {
-			glog.Errorf("rkt: Failed to receive log for pod %q: %v", format.Pod(pod), err)
-			return err
-		}
-		processLines(log.Lines, logOptions, stdout, stderr)
-	}
-
-	return nil
-}

pkg/kubelet/rkt/systemd.go

-/*
-Copyright 2015 The Kubernetes 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
-
-    http://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 rkt
-
-import (
-	"fmt"
-	"strconv"
-	"strings"
-
-	"github.com/coreos/go-systemd/dbus"
-)
-
-// systemdVersion is a type wraps the int to implement kubecontainer.Version interface.
-type systemdVersion int
-
-func (s systemdVersion) String() string {
-	return fmt.Sprintf("%d", s)
-}
-
-func (s systemdVersion) Compare(other string) (int, error) {
-	v, err := strconv.Atoi(other)
-	if err != nil {
-		return -1, err
-	}
-	if int(s) < v {
-		return -1, nil
-	} else if int(s) > v {
-		return 1, nil
-	}
-	return 0, nil
-}
-
-// systemdInterface is an abstraction of the go-systemd/dbus to make
-// it mockable for testing.
-// TODO(yifan): Eventually we should move these functionalities to:
-// 1. a package for launching/stopping rkt pods.
-// 2. rkt api-service interface for listing pods.
-// See https://github.com/coreos/rkt/issues/1769.
-type systemdInterface interface {
-	// Version returns the version of the systemd.
-	Version() (systemdVersion, error)
-	// ListUnits lists all the loaded units.
-	ListUnits() ([]dbus.UnitStatus, error)
-	// StopUnits stops the unit with the given name.
-	StopUnit(name string, mode string, ch chan<- string) (int, error)
-	// RestartUnit restarts the unit with the given name.
-	RestartUnit(name string, mode string, ch chan<- string) (int, error)
-	// ResetFailedUnit resets the "failed" state of a specific unit.
-	ResetFailedUnit(name string) error
-}
-
-// systemd implements the systemdInterface using dbus and systemctl.
-// All the functions other then Version() are already implemented by go-systemd/dbus.
-type systemd struct {
-	*dbus.Conn
-}
-
-// newSystemd creates a systemd object that implements systemdInterface.
-func newSystemd() (*systemd, error) {
-	dbusConn, err := dbus.New()
-	if err != nil {
-		return nil, err
-	}
-	return &systemd{dbusConn}, nil
-}
-
-// Version returns the version of the systemd.
-func (s *systemd) Version() (systemdVersion, error) {
-	versionStr, err := s.Conn.GetManagerProperty("Version")
-	if err != nil {
-		return -1, err
-	}
-	result, err := strconv.Atoi(strings.Trim(versionStr, "\""))
-	if err != nil {
-		return -1, err
-	}
-	return systemdVersion(result), nil
-}

pkg/kubelet/rkt/version.go

-/*
-Copyright 2015 The Kubernetes 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
-
-    http://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 rkt
-
-import (
-	"context"
-	"fmt"
-	"sync"
-
-	rktapi "github.com/coreos/rkt/api/v1alpha"
-
-	utilversion "k8s.io/kubernetes/pkg/util/version"
-)
-
-type versions struct {
-	sync.RWMutex
-	binVersion     *utilversion.Version
-	apiVersion     *utilversion.Version
-	systemdVersion systemdVersion
-}
-
-func newRktVersion(version string) (*utilversion.Version, error) {
-	return utilversion.ParseSemantic(version)
-}
-
-func (r *Runtime) getVersions() error {
-	r.versions.Lock()
-	defer r.versions.Unlock()
-
-	// Get systemd version.
-	var err error
-	r.versions.systemdVersion, err = r.systemd.Version()
-	if err != nil {
-		return err
-	}
-
-	ctx, cancel := context.WithTimeout(context.Background(), r.requestTimeout)
-	defer cancel()
-	// Example for the version strings returned by GetInfo():
-	// RktVersion:"0.10.0+gitb7349b1" AppcVersion:"0.7.1" ApiVersion:"1.0.0-alpha"
-	resp, err := r.apisvc.GetInfo(ctx, &rktapi.GetInfoRequest{})
-	if err != nil {
-		return err
-	}
-
-	// Get rkt binary version.
-	r.versions.binVersion, err = newRktVersion(resp.Info.RktVersion)
-	if err != nil {
-		return err
-	}
-
-	// Get rkt API version.
-	r.versions.apiVersion, err = newRktVersion(resp.Info.ApiVersion)
-	if err != nil {
-		return err
-	}
-	return nil
-}
-
-// checkVersion tests whether the rkt/systemd/rkt-api-service that meet the version requirement.
-// If all version requirements are met, it returns nil.
-func (r *Runtime) checkVersion(minimumRktBinVersion, minimumRktApiVersion, minimumSystemdVersion string) error {
-	if err := r.getVersions(); err != nil {
-		return err
-	}
-
-	r.versions.RLock()
-	defer r.versions.RUnlock()
-
-	// Check systemd version.
-	result, err := r.versions.systemdVersion.Compare(minimumSystemdVersion)
-	if err != nil {
-		return err
-	}
-	if result < 0 {
-		return fmt.Errorf("rkt: systemd version(%v) is too old, requires at least %v", r.versions.systemdVersion, minimumSystemdVersion)
-	}
-
-	// Check rkt binary version.
-	result, err = r.versions.binVersion.Compare(minimumRktBinVersion)
-	if err != nil {
-		return err
-	}
-	if result < 0 {
-		return fmt.Errorf("rkt: binary version is too old(%v), requires at least %v", r.versions.binVersion, minimumRktBinVersion)
-	}
-
-	// Check rkt API version.
-	result, err = r.versions.apiVersion.Compare(minimumRktApiVersion)
-	if err != nil {
-		return err
-	}
-	if result < 0 {
-		return fmt.Errorf("rkt: API version is too old(%v), requires at least %v", r.versions.apiVersion, minimumRktApiVersion)
-	}
-	return nil
-}

pkg/kubelet/sysctl/runtime.go

@@ -31,7 +31,6 @@ const (
 	dockerMinimumAPIVersion = "1.24.0"
 
 	dockerTypeName = "docker"
-	rktTypeName    = "rkt"
 )
 
 // TODO: The admission logic in this file is runtime-dependent. It should be
@@ -72,14 +71,6 @@ func NewRuntimeAdmitHandler(runtime container.Runtime) (*runtimeAdmitHandler, er
 				Message: "Docker API version before 1.24 does not support sysctls",
 			},
 		}, nil
-	case rktTypeName:
-		return &runtimeAdmitHandler{
-			result: lifecycle.PodAdmitResult{
-				Admit:   false,
-				Reason:  UnsupportedReason,
-				Message: "Rkt does not support sysctls",
-			},
-		}, nil
 	default:
 		// Return admit for other runtimes.
 		return &runtimeAdmitHandler{

pkg/kubelet/types/constants.go

@@ -22,7 +22,6 @@ const (
 
 	// different container runtimes
 	DockerContainerRuntime = "docker"
-	RktContainerRuntime    = "rkt"
 	RemoteContainerRuntime = "remote"
 
 	// User visible keys for managing node allocatable enforcement on the node.