Merge pull request #114017 from calvin0327/cleanup-containerruntime-options

cleanup container runtime options

cluster/gce/util.sh

@@ -1183,7 +1183,6 @@ PROMETHEUS_TO_SD_ENDPOINT: $(yaml-quote "${PROMETHEUS_TO_SD_ENDPOINT:-}")
 PROMETHEUS_TO_SD_PREFIX: $(yaml-quote "${PROMETHEUS_TO_SD_PREFIX:-}")
 ENABLE_PROMETHEUS_TO_SD: $(yaml-quote "${ENABLE_PROMETHEUS_TO_SD:-false}")
 DISABLE_PROMETHEUS_TO_SD_IN_DS: $(yaml-quote "${DISABLE_PROMETHEUS_TO_SD_IN_DS:-false}")
-CONTAINER_RUNTIME: $(yaml-quote "${CONTAINER_RUNTIME:-}")
 CONTAINER_RUNTIME_ENDPOINT: $(yaml-quote "${CONTAINER_RUNTIME_ENDPOINT:-}")
 CONTAINER_RUNTIME_NAME: $(yaml-quote "${CONTAINER_RUNTIME_NAME:-}")
 CONTAINER_RUNTIME_TEST_HANDLER: $(yaml-quote "${CONTAINER_RUNTIME_TEST_HANDLER:-}")

cmd/kubelet/app/options/container_runtime.go

@@ -18,7 +18,6 @@ package options
 
 import (
 	"k8s.io/kubernetes/pkg/kubelet/config"
-	kubetypes "k8s.io/kubernetes/pkg/kubelet/types"
 )
 
 const (
@@ -36,7 +35,6 @@ var (
 // default values.
 func NewContainerRuntimeOptions() *config.ContainerRuntimeOptions {
 	return &config.ContainerRuntimeOptions{
-		ContainerRuntime: kubetypes.RemoteContainerRuntime,
 		PodSandboxImage: defaultPodSandboxImage,
 	}
 }

cmd/kubelet/app/options/options.go

@@ -37,7 +37,6 @@ import (
 	kubeletscheme "k8s.io/kubernetes/pkg/kubelet/apis/config/scheme"
 	kubeletconfigvalidation "k8s.io/kubernetes/pkg/kubelet/apis/config/validation"
 	"k8s.io/kubernetes/pkg/kubelet/config"
-	kubetypes "k8s.io/kubernetes/pkg/kubelet/types"
 	utilflag "k8s.io/kubernetes/pkg/util/flag"
 )
 
@@ -178,11 +177,6 @@ func ValidateKubeletFlags(f *KubeletFlags) error {
 		}
 		return fmt.Errorf("invalid node labels: %s", strings.Join(labelErrs, "; "))
 	}
-
-	if f.ContainerRuntime != kubetypes.RemoteContainerRuntime {
-		return fmt.Errorf("unsupported CRI runtime: %q, only %q is currently supported", f.ContainerRuntime, kubetypes.RemoteContainerRuntime)
-	}
-
 	return nil
 }
 
@@ -477,8 +471,8 @@ func AddKubeletConfigFlags(mainfs *pflag.FlagSet, c *kubeletconfig.KubeletConfig
 	fs.BoolVar(&c.MakeIPTablesUtilChains, "make-iptables-util-chains", c.MakeIPTablesUtilChains, "If true, kubelet will ensure iptables utility rules are present on host.")
 	fs.Int32Var(&c.IPTablesMasqueradeBit, "iptables-masquerade-bit", c.IPTablesMasqueradeBit, "The bit of the fwmark space to mark packets for SNAT. Must be within the range [0, 31]. Please match this parameter with corresponding parameter in kube-proxy.")
 	fs.Int32Var(&c.IPTablesDropBit, "iptables-drop-bit", c.IPTablesDropBit, "The bit of the fwmark space to mark packets for dropping. Must be within the range [0, 31].")
-	fs.StringVar(&c.ContainerLogMaxSize, "container-log-max-size", c.ContainerLogMaxSize, "<Warning: Beta feature> Set the maximum size (e.g. 10Mi) of container log file before it is rotated. This flag can only be used with --container-runtime=remote.")
+	fs.StringVar(&c.ContainerLogMaxSize, "container-log-max-size", c.ContainerLogMaxSize, "<Warning: Beta feature> Set the maximum size (e.g. 10Mi) of container log file before it is rotated.")
-	fs.Int32Var(&c.ContainerLogMaxFiles, "container-log-max-files", c.ContainerLogMaxFiles, "<Warning: Beta feature> Set the maximum number of container log files that can be present for a container. The number must be >= 2. This flag can only be used with --container-runtime=remote.")
+	fs.Int32Var(&c.ContainerLogMaxFiles, "container-log-max-files", c.ContainerLogMaxFiles, "<Warning: Beta feature> Set the maximum number of container log files that can be present for a container. The number must be >= 2.")
 	fs.StringSliceVar(&c.AllowedUnsafeSysctls, "allowed-unsafe-sysctls", c.AllowedUnsafeSysctls, "Comma-separated whitelist of unsafe sysctls or unsafe sysctl patterns (ending in *). Use these at your own risk.")
 
 	fs.Int32Var(&c.NodeStatusMaxImages, "node-status-max-images", c.NodeStatusMaxImages, "The maximum number of images to report in Node.Status.Images. If -1 is specified, no cap will be applied.")

cmd/kubelet/app/options/options_test.go

@@ -26,7 +26,6 @@ import (
 	"k8s.io/apimachinery/pkg/util/diff"
 	cliflag "k8s.io/component-base/cli/flag"
 	"k8s.io/kubernetes/pkg/kubelet/config"
-	kubetypes "k8s.io/kubernetes/pkg/kubelet/types"
 )
 
 func newKubeletServerOrDie() *KubeletServer {
@@ -180,9 +179,7 @@ func TestValidateKubeletFlags(t *testing.T) {
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			err := ValidateKubeletFlags(&KubeletFlags{
-				ContainerRuntimeOptions: config.ContainerRuntimeOptions{
+				ContainerRuntimeOptions: config.ContainerRuntimeOptions{},
-					ContainerRuntime: kubetypes.RemoteContainerRuntime,
-				},
 				NodeLabels:              tt.labels,
 			})
 

hack/local-up-cluster.sh

@@ -218,7 +218,6 @@ LOG_LEVEL=${LOG_LEVEL:-3}
 LOG_SPEC=${LOG_SPEC:-""}
 LOG_DIR=${LOG_DIR:-"/tmp"}
 TMP_DIR=${TMP_DIR:-$(kube::realpath "$(mktemp -d -t "$(basename "$0").XXXXXX")")}
-CONTAINER_RUNTIME=${CONTAINER_RUNTIME:-"remote"}
 CONTAINER_RUNTIME_ENDPOINT=${CONTAINER_RUNTIME_ENDPOINT:-"unix:///run/containerd/containerd.sock"}
 RUNTIME_REQUEST_TIMEOUT=${RUNTIME_REQUEST_TIMEOUT:-"2m"}
 IMAGE_SERVICE_ENDPOINT=${IMAGE_SERVICE_ENDPOINT:-""}
@@ -713,7 +712,6 @@ function start_kubelet {
     all_kubelet_flags=(
       "--v=${LOG_LEVEL}"
       "--vmodule=${LOG_SPEC}"
-      "--container-runtime=${CONTAINER_RUNTIME}"
       "--hostname-override=${HOSTNAME_OVERRIDE}"
       "${cloud_config_arg[@]}"
       "--bootstrap-kubeconfig=${CERT_DIR}/kubelet.kubeconfig"

pkg/kubelet/config/flags.go

@@ -26,8 +26,6 @@ import (
 type ContainerRuntimeOptions struct {
 	// General Options.
 
-	// ContainerRuntime is the container runtime to use.
-	ContainerRuntime string
 	// RuntimeCgroups that container runtime is expected to be isolated in.
 	RuntimeCgroups string
 	// PodSandboxImage is the image whose network/ipc namespaces
@@ -51,11 +49,9 @@ type ContainerRuntimeOptions struct {
 // AddFlags adds flags to the container runtime, according to ContainerRuntimeOptions.
 func (s *ContainerRuntimeOptions) AddFlags(fs *pflag.FlagSet) {
 	// General settings.
-	fs.StringVar(&s.ContainerRuntime, "container-runtime", s.ContainerRuntime, "The container runtime to use. Possible value: 'remote'.")
-	fs.MarkDeprecated("container-runtime", "will be removed in 1.27 as the only valid value is 'remote'")
 	fs.StringVar(&s.RuntimeCgroups, "runtime-cgroups", s.RuntimeCgroups, "Optional absolute name of cgroups to create and run the runtime in.")
 	fs.StringVar(&s.PodSandboxImage, "pod-infra-container-image", s.PodSandboxImage, fmt.Sprintf("Specified image will not be pruned by the image garbage collector. CRI implementations have their own configuration to set this image."))
-	fs.MarkDeprecated("pod-infra-container-image", "will be removed in 1.27. Image garbage collector will get sandbox image information from CRI.")
+	fs.MarkDeprecated("pod-infra-container-image", "will be removed in a future release. Image garbage collector will get sandbox image information from CRI.")
 
 	// Image credential provider settings.
 	fs.StringVar(&s.ImageCredentialProviderConfigFile, "image-credential-provider-config", s.ImageCredentialProviderConfigFile, "The path to the credential provider plugin config file.")

pkg/kubelet/types/constants.go

@@ -25,11 +25,6 @@ const (
 	RFC3339NanoLenient = "2006-01-02T15:04:05.999999999Z07:00"
 )
 
-// Different container runtimes.
-const (
-	RemoteContainerRuntime = "remote"
-)
-
 // User visible keys for managing node allocatable enforcement on the node.
 const (
 	NodeAllocatableEnforcementKey = "pods"