mirror of https://github.com/docker/cli.git
137 lines
3.8 KiB
Go
137 lines
3.8 KiB
Go
package kubernetes
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import (
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"encoding/json"
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"fmt"
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"io/ioutil"
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"net/http"
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"net/url"
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"github.com/docker/cli/cli/command"
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"github.com/docker/cli/cli/command/stack/formatter"
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"github.com/docker/cli/cli/command/stack/options"
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"github.com/docker/cli/cli/config/configfile"
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"github.com/pkg/errors"
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core_v1 "k8s.io/api/core/v1"
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apierrs "k8s.io/apimachinery/pkg/api/errors"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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)
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// GetStacks lists the kubernetes stacks
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func GetStacks(kubeCli *KubeCli, opts options.List) ([]*formatter.Stack, error) {
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if opts.AllNamespaces || len(opts.Namespaces) == 0 {
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if isAllNamespacesDisabled(kubeCli.ConfigFile().Kubernetes) {
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opts.AllNamespaces = true
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}
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return getStacksWithAllNamespaces(kubeCli, opts)
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}
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return getStacksWithNamespaces(kubeCli, opts, removeDuplicates(opts.Namespaces))
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}
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func isAllNamespacesDisabled(kubeCliConfig *configfile.KubernetesConfig) bool {
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return kubeCliConfig == nil || kubeCliConfig != nil && kubeCliConfig.AllNamespaces != "disabled"
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}
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func getStacks(kubeCli *KubeCli, opts options.List) ([]*formatter.Stack, error) {
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composeClient, err := kubeCli.composeClient()
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if err != nil {
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return nil, err
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}
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stackSvc, err := composeClient.Stacks(opts.AllNamespaces)
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if err != nil {
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return nil, err
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}
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stacks, err := stackSvc.List(metav1.ListOptions{})
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if err != nil {
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return nil, err
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}
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var formattedStacks []*formatter.Stack
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for _, stack := range stacks {
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formattedStacks = append(formattedStacks, &formatter.Stack{
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Name: stack.Name,
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Services: len(stack.getServices()),
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Orchestrator: "Kubernetes",
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Namespace: stack.Namespace,
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})
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}
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return formattedStacks, nil
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}
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func getStacksWithAllNamespaces(kubeCli *KubeCli, opts options.List) ([]*formatter.Stack, error) {
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stacks, err := getStacks(kubeCli, opts)
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if !apierrs.IsForbidden(err) {
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return stacks, err
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}
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namespaces, err2 := getUserVisibleNamespaces(*kubeCli)
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if err2 != nil {
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return nil, errors.Wrap(err2, "failed to query user visible namespaces")
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}
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if namespaces == nil {
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// UCP API not present, fall back to Kubernetes error
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return nil, err
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}
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opts.AllNamespaces = false
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return getStacksWithNamespaces(kubeCli, opts, namespaces)
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}
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func getUserVisibleNamespaces(dockerCli command.Cli) ([]string, error) {
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host := dockerCli.Client().DaemonHost()
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endpoint, err := url.Parse(host)
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if err != nil {
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return nil, err
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}
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endpoint.Scheme = "https"
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endpoint.Path = "/kubernetesNamespaces"
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resp, err := dockerCli.Client().HTTPClient().Get(endpoint.String())
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if err != nil {
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return nil, err
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}
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defer resp.Body.Close()
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body, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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return nil, errors.Wrapf(err, "received %d status and unable to read response", resp.StatusCode)
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}
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switch resp.StatusCode {
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case http.StatusOK:
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nms := &core_v1.NamespaceList{}
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if err := json.Unmarshal(body, nms); err != nil {
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return nil, errors.Wrapf(err, "unmarshal failed: %s", string(body))
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}
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namespaces := make([]string, len(nms.Items))
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for i, namespace := range nms.Items {
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namespaces[i] = namespace.Name
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}
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return namespaces, nil
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case http.StatusNotFound:
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// UCP API not present
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return nil, nil
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default:
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return nil, fmt.Errorf("received %d status while retrieving namespaces: %s", resp.StatusCode, string(body))
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}
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}
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func getStacksWithNamespaces(kubeCli *KubeCli, opts options.List, namespaces []string) ([]*formatter.Stack, error) {
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stacks := []*formatter.Stack{}
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for _, namespace := range namespaces {
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kubeCli.kubeNamespace = namespace
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ss, err := getStacks(kubeCli, opts)
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if err != nil {
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return nil, err
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}
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stacks = append(stacks, ss...)
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}
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return stacks, nil
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}
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func removeDuplicates(namespaces []string) []string {
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found := make(map[string]bool)
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results := namespaces[:0]
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for _, n := range namespaces {
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if !found[n] {
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results = append(results, n)
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found[n] = true
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}
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}
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return results
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}
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