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272 lines
10 KiB
Go
272 lines
10 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package set
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import (
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"fmt"
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"io"
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"strings"
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"github.com/spf13/cobra"
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"k8s.io/apimachinery/pkg/api/meta"
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api "k8s.io/kubernetes/pkg/apis/core"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/types"
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utilerrors "k8s.io/apimachinery/pkg/util/errors"
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"k8s.io/kubernetes/pkg/api/legacyscheme"
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"k8s.io/kubernetes/pkg/kubectl"
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"k8s.io/kubernetes/pkg/kubectl/cmd/templates"
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cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
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"k8s.io/kubernetes/pkg/kubectl/resource"
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"k8s.io/kubernetes/pkg/kubectl/util/i18n"
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)
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var (
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resources_long = templates.LongDesc(`
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Specify compute resource requirements (cpu, memory) for any resource that defines a pod template. If a pod is successfully scheduled, it is guaranteed the amount of resource requested, but may burst up to its specified limits.
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for each compute resource, if a limit is specified and a request is omitted, the request will default to the limit.
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Possible resources include (case insensitive): %s.`)
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resources_example = templates.Examples(`
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# Set a deployments nginx container cpu limits to "200m" and memory to "512Mi"
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kubectl set resources deployment nginx -c=nginx --limits=cpu=200m,memory=512Mi
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# Set the resource request and limits for all containers in nginx
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kubectl set resources deployment nginx --limits=cpu=200m,memory=512Mi --requests=cpu=100m,memory=256Mi
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# Remove the resource requests for resources on containers in nginx
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kubectl set resources deployment nginx --limits=cpu=0,memory=0 --requests=cpu=0,memory=0
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# Print the result (in yaml format) of updating nginx container limits from a local, without hitting the server
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kubectl set resources -f path/to/file.yaml --limits=cpu=200m,memory=512Mi --local -o yaml`)
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)
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// ResourcesOptions is the start of the data required to perform the operation. As new fields are added, add them here instead of
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// referencing the cmd.Flags
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type ResourcesOptions struct {
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resource.FilenameOptions
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Mapper meta.RESTMapper
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Typer runtime.ObjectTyper
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Infos []*resource.Info
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Encoder runtime.Encoder
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Out io.Writer
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Err io.Writer
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Selector string
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ContainerSelector string
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Output string
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All bool
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Record bool
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ChangeCause string
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Local bool
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Cmd *cobra.Command
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Limits string
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Requests string
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ResourceRequirements api.ResourceRequirements
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PrintObject func(cmd *cobra.Command, isLocal bool, mapper meta.RESTMapper, obj runtime.Object, out io.Writer) error
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UpdatePodSpecForObject func(obj runtime.Object, fn func(*api.PodSpec) error) (bool, error)
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Resources []string
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}
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func NewCmdResources(f cmdutil.Factory, out io.Writer, errOut io.Writer) *cobra.Command {
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options := &ResourcesOptions{
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Out: out,
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Err: errOut,
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}
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resourceTypesWithPodTemplate := []string{}
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for _, resource := range f.SuggestedPodTemplateResources() {
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resourceTypesWithPodTemplate = append(resourceTypesWithPodTemplate, resource.Resource)
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}
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cmd := &cobra.Command{
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Use: "resources (-f FILENAME | TYPE NAME) ([--limits=LIMITS & --requests=REQUESTS]",
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Short: i18n.T("Update resource requests/limits on objects with pod templates"),
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Long: fmt.Sprintf(resources_long, strings.Join(resourceTypesWithPodTemplate, ", ")),
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Example: resources_example,
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Run: func(cmd *cobra.Command, args []string) {
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cmdutil.CheckErr(options.Complete(f, cmd, args))
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cmdutil.CheckErr(options.Validate())
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cmdutil.CheckErr(options.Run())
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},
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}
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cmdutil.AddPrinterFlags(cmd)
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//usage := "Filename, directory, or URL to a file identifying the resource to get from the server"
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//kubectl.AddJsonFilenameFlag(cmd, &options.Filenames, usage)
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usage := "identifying the resource to get from a server."
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cmdutil.AddFilenameOptionFlags(cmd, &options.FilenameOptions, usage)
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cmd.Flags().BoolVar(&options.All, "all", false, "Select all resources, including uninitialized ones, in the namespace of the specified resource types")
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cmd.Flags().StringVarP(&options.Selector, "selector", "l", "", "Selector (label query) to filter on, not including uninitialized ones,supports '=', '==', and '!='.(e.g. -l key1=value1,key2=value2)")
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cmd.Flags().StringVarP(&options.ContainerSelector, "containers", "c", "*", "The names of containers in the selected pod templates to change, all containers are selected by default - may use wildcards")
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cmd.Flags().BoolVar(&options.Local, "local", false, "If true, set resources will NOT contact api-server but run locally.")
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cmdutil.AddDryRunFlag(cmd)
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cmdutil.AddRecordFlag(cmd)
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cmdutil.AddIncludeUninitializedFlag(cmd)
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cmd.Flags().StringVar(&options.Limits, "limits", options.Limits, "The resource requirement requests for this container. For example, 'cpu=100m,memory=256Mi'. Note that server side components may assign requests depending on the server configuration, such as limit ranges.")
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cmd.Flags().StringVar(&options.Requests, "requests", options.Requests, "The resource requirement requests for this container. For example, 'cpu=100m,memory=256Mi'. Note that server side components may assign requests depending on the server configuration, such as limit ranges.")
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return cmd
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}
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func (o *ResourcesOptions) Complete(f cmdutil.Factory, cmd *cobra.Command, args []string) error {
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o.Mapper, o.Typer = f.Object()
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o.UpdatePodSpecForObject = f.UpdatePodSpecForObject
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o.Encoder = f.JSONEncoder()
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o.Output = cmdutil.GetFlagString(cmd, "output")
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o.Record = cmdutil.GetRecordFlag(cmd)
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o.Local = cmdutil.GetFlagBool(cmd, "local")
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o.ChangeCause = f.Command(cmd, false)
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o.PrintObject = f.PrintObject
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o.Cmd = cmd
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cmdNamespace, enforceNamespace, err := f.DefaultNamespace()
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if err != nil {
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return err
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}
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includeUninitialized := cmdutil.ShouldIncludeUninitialized(cmd, false)
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builder := f.NewBuilder().
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ContinueOnError().
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NamespaceParam(cmdNamespace).DefaultNamespace().
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FilenameParam(enforceNamespace, &o.FilenameOptions).
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IncludeUninitialized(includeUninitialized).
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Flatten()
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if o.Local {
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// if a --local flag was provided, and a resource was specified in the form
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// <resource>/<name>, fail immediately as --local cannot query the api server
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// for the specified resource.
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if len(args) > 0 {
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return resource.LocalResourceError
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}
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builder = builder.Local(f.ClientForMapping)
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} else {
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builder = builder.
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LabelSelectorParam(o.Selector).
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ResourceTypeOrNameArgs(o.All, args...).
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Latest()
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}
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o.Infos, err = builder.Do().Infos()
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if err != nil {
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return err
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}
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return nil
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}
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func (o *ResourcesOptions) Validate() error {
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var err error
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if len(o.Limits) == 0 && len(o.Requests) == 0 {
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return fmt.Errorf("you must specify an update to requests or limits (in the form of --requests/--limits)")
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}
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o.ResourceRequirements, err = kubectl.HandleResourceRequirements(map[string]string{"limits": o.Limits, "requests": o.Requests})
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if err != nil {
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return err
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}
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return nil
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}
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func (o *ResourcesOptions) Run() error {
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allErrs := []error{}
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patches := CalculatePatches(o.Infos, o.Encoder, func(info *resource.Info) ([]byte, error) {
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transformed := false
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_, err := o.UpdatePodSpecForObject(info.Object, func(spec *api.PodSpec) error {
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containers, _ := selectContainers(spec.Containers, o.ContainerSelector)
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if len(containers) != 0 {
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for i := range containers {
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if len(o.Limits) != 0 && len(containers[i].Resources.Limits) == 0 {
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containers[i].Resources.Limits = make(api.ResourceList)
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}
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for key, value := range o.ResourceRequirements.Limits {
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containers[i].Resources.Limits[key] = value
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}
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if len(o.Requests) != 0 && len(containers[i].Resources.Requests) == 0 {
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containers[i].Resources.Requests = make(api.ResourceList)
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}
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for key, value := range o.ResourceRequirements.Requests {
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containers[i].Resources.Requests[key] = value
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}
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transformed = true
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}
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} else {
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allErrs = append(allErrs, fmt.Errorf("error: unable to find container named %s", o.ContainerSelector))
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}
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return nil
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})
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if transformed && err == nil {
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// TODO: switch UpdatePodSpecForObject to work on v1.PodSpec, use info.VersionedObject, and avoid conversion completely
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versionedEncoder := legacyscheme.Codecs.EncoderForVersion(o.Encoder, info.Mapping.GroupVersionKind.GroupVersion())
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return runtime.Encode(versionedEncoder, info.Object)
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}
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return nil, err
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})
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for _, patch := range patches {
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info := patch.Info
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if patch.Err != nil {
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allErrs = append(allErrs, fmt.Errorf("error: %s/%s %v\n", info.Mapping.Resource, info.Name, patch.Err))
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continue
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}
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//no changes
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if string(patch.Patch) == "{}" || len(patch.Patch) == 0 {
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allErrs = append(allErrs, fmt.Errorf("info: %s %q was not changed\n", info.Mapping.Resource, info.Name))
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continue
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}
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if o.Local || cmdutil.GetDryRunFlag(o.Cmd) {
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if err := o.PrintObject(o.Cmd, o.Local, o.Mapper, info.Object, o.Out); err != nil {
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return err
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}
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continue
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}
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obj, err := resource.NewHelper(info.Client, info.Mapping).Patch(info.Namespace, info.Name, types.StrategicMergePatchType, patch.Patch)
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if err != nil {
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allErrs = append(allErrs, fmt.Errorf("failed to patch limit update to pod template %v\n", err))
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continue
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}
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info.Refresh(obj, true)
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//record this change (for rollout history)
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if o.Record || cmdutil.ContainsChangeCause(info) {
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if err := cmdutil.RecordChangeCause(obj, o.ChangeCause); err == nil {
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if obj, err = resource.NewHelper(info.Client, info.Mapping).Replace(info.Namespace, info.Name, false, obj); err != nil {
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allErrs = append(allErrs, fmt.Errorf("changes to %s/%s can't be recorded: %v\n", info.Mapping.Resource, info.Name, err))
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}
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}
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}
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info.Refresh(obj, true)
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shortOutput := o.Output == "name"
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if len(o.Output) > 0 && !shortOutput {
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return o.PrintObject(o.Cmd, o.Local, o.Mapper, info.Object, o.Out)
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}
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cmdutil.PrintSuccess(o.Mapper, shortOutput, o.Out, info.Mapping.Resource, info.Name, false, "resource requirements updated")
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}
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return utilerrors.NewAggregate(allErrs)
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}
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