/
kubernetes.go
1699 lines (1498 loc) · 50.7 KB
/
kubernetes.go
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/*
Copyright 2018 The Doctl Authors All rights reserved.
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 commands
import (
"context"
"crypto/x509"
"encoding/json"
"encoding/pem"
"errors"
"fmt"
"os"
"path/filepath"
"sort"
"strconv"
"strings"
"time"
"github.com/blang/semver"
"github.com/digitalocean/doctl"
"github.com/digitalocean/doctl/commands/displayers"
"github.com/digitalocean/doctl/do"
"github.com/digitalocean/godo"
"github.com/pborman/uuid"
"github.com/spf13/cobra"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
clientauthentication "k8s.io/client-go/pkg/apis/clientauthentication/v1beta1"
"k8s.io/client-go/tools/clientcmd"
clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
)
const (
maxAPIFailures = 5
timeoutFetchingKubeconfig = 30 * time.Second
defaultKubernetesNodeSize = "s-1vcpu-2gb"
defaultKubernetesNodeCount = 3
defaultKubernetesRegion = "nyc1"
defaultKubernetesLatestVersion = "latest"
)
func errNoClusterByName(name string) error {
return fmt.Errorf("no cluster goes by the name %q", name)
}
func errAmbigousClusterName(name string, ids []string) error {
return fmt.Errorf("many clusters go by the name %q, they have the following IDs: %v", name, ids)
}
func errNoPoolByName(name string) error {
return fmt.Errorf("no node pool goes by the name %q", name)
}
func errAmbigousPoolName(name string, ids []string) error {
return fmt.Errorf("many node pools go by the name %q, they have the following IDs: %v", name, ids)
}
func errNoClusterNodeByName(name string) error {
return fmt.Errorf("no node goes by the name %q", name)
}
func errAmbigousClusterNodeName(name string, ids []string) error {
return fmt.Errorf("many nodes go by the name %q, they have the following IDs: %v", name, ids)
}
// Kubernetes creates the kubernetes command.
func Kubernetes() *Command {
cmd := &Command{
Command: &cobra.Command{
Use: "kubernetes",
Aliases: []string{"kube", "k8s", "k"},
Short: "kubernetes commands",
Long: "kubernetes is used to access Kubernetes commands",
},
}
cmd.AddCommand(kubernetesCluster())
cmd.AddCommand(kubernetesOptions())
return cmd
}
func kubernetesCluster() *Command {
cmd := &Command{
Command: &cobra.Command{
Use: "cluster",
Aliases: []string{"clusters", "c"},
Short: "clusters commands",
Long: "clusters is used to access commands on Kubernetes clusters",
},
}
cmd.AddCommand(kubernetesKubeconfig())
cmd.AddCommand(kubernetesNodePools())
CmdBuilder(cmd, RunKubernetesClusterGet, "get <id|name>", "get a cluster",
Writer, aliasOpt("g"), displayerType(&displayers.KubernetesClusters{}))
CmdBuilder(cmd, RunKubernetesClusterList, "list", "get a list of your clusters",
Writer, aliasOpt("ls"), displayerType(&displayers.KubernetesClusters{}))
CmdBuilder(cmd, RunKubernetesClusterGetUpgrades, "get-upgrades <id|name>",
"get available upgrades for a cluster", Writer, aliasOpt("gu"))
cmdKubeClusterCreate := CmdBuilder(cmd, RunKubernetesClusterCreate(defaultKubernetesNodeSize,
defaultKubernetesNodeCount), "create <name>", "create a cluster",
Writer, aliasOpt("c"))
AddStringFlag(cmdKubeClusterCreate, doctl.ArgRegionSlug, "", defaultKubernetesRegion,
`cluster region, possible values: see "doctl k8s options regions"`, requiredOpt())
AddStringFlag(cmdKubeClusterCreate, doctl.ArgClusterVersionSlug, "", "latest",
`cluster version, possible values: see "doctl k8s options versions"`)
AddBoolFlag(cmdKubeClusterCreate, doctl.ArgAutoUpgrade, "", false,
"whether to enable auto-upgrade for the cluster")
AddStringSliceFlag(cmdKubeClusterCreate, doctl.ArgTag, "", nil,
"tags to apply to the cluster, repeat to add multiple tags at once")
AddStringFlag(cmdKubeClusterCreate, doctl.ArgSizeSlug, "",
defaultKubernetesNodeSize,
`size of nodes in the default node pool (incompatible with --`+doctl.ArgClusterNodePool+`), possible values: see "doctl k8s options sizes".`)
AddIntFlag(cmdKubeClusterCreate, doctl.ArgNodePoolCount, "",
defaultKubernetesNodeCount,
"number of nodes in the default node pool (incompatible with --"+doctl.ArgClusterNodePool+")")
AddStringSliceFlag(cmdKubeClusterCreate, doctl.ArgClusterNodePool, "", nil,
`cluster node pools, can be repeated to create multiple node pools at once (incompatible with --`+doctl.ArgSizeSlug+` and --`+doctl.ArgNodePoolCount+`)
format is in the form "name=your-name;size=size_slug;count=5;tag=tag1;tag=tag2" where:
- name: name of the node pool, must be unique in the cluster
- size: size for the nodes in the node pool, possible values: see "doctl k8s options sizes".
- count: number of nodes in the node pool.
- tag: tags to apply to the node pool, repeat to add multiple tags at once.`)
AddBoolFlag(cmdKubeClusterCreate, doctl.ArgClusterUpdateKubeconfig, "", true,
"whether to add the created cluster to your kubeconfig")
AddBoolFlag(cmdKubeClusterCreate, doctl.ArgCommandWait, "", true,
"whether to wait for the created cluster to become running")
AddBoolFlag(cmdKubeClusterCreate, doctl.ArgSetCurrentContext, "", true,
"whether to set the current kubectl context to that of the new cluster")
AddStringFlag(cmdKubeClusterCreate, doctl.ArgMaintenanceWindow, "", "any=00:00",
"maintenance window to be set to the cluster. Syntax is in the format: 'day=HH:MM', where time is in UTC time zone. Day can be one of: ['any', 'monday', 'tuesday', 'wednesday', 'thursday', 'friday', 'saturday', 'sunday']")
cmdKubeClusterUpdate := CmdBuilder(cmd, RunKubernetesClusterUpdate, "update <id|name>",
"update a cluster's properties", Writer, aliasOpt("u"))
AddStringFlag(cmdKubeClusterUpdate, doctl.ArgClusterName, "", "",
"new cluster name")
AddStringSliceFlag(cmdKubeClusterUpdate, doctl.ArgTag, "", nil,
"tags to apply to the cluster, repeat to add multiple tags at once")
AddBoolFlag(cmdKubeClusterUpdate, doctl.ArgAutoUpgrade, "", false,
"whether to enable auto-upgrade for the cluster")
AddBoolFlag(cmdKubeClusterUpdate, doctl.ArgClusterUpdateKubeconfig, "",
true, "whether to update the cluster in your kubeconfig")
AddBoolFlag(cmdKubeClusterUpdate, doctl.ArgSetCurrentContext, "", true,
"whether to set the current kubectl context to that of the new cluster")
AddStringFlag(cmdKubeClusterUpdate, doctl.ArgMaintenanceWindow, "", "any=00:00",
"maintenance window to be set to the cluster. Syntax is in the format: 'day=HH:MM', where time is in UTC time zone. Day can be one of: ['any', 'monday', 'tuesday', 'wednesday', 'thursday', 'friday', 'saturday', 'sunday']")
cmdKubeClusterUpgrade := CmdBuilder(cmd, RunKubernetesClusterUpgrade,
"upgrade <id|name>", "upgrade a cluster to a new version", Writer)
AddStringFlag(cmdKubeClusterUpgrade, doctl.ArgClusterVersionSlug, "", "latest",
`new cluster version, possible values: see "doctl k8s get-upgrades <cluster>".
The special value "latest" will select the most recent patch version for your cluster's minor version.
For example, if a cluster is on 1.12.1 and upgrades are available to 1.12.3 and 1.13.1, 1.12.3 will be "latest".`)
cmdKubeClusterDelete := CmdBuilder(cmd, RunKubernetesClusterDelete,
"delete <id|name>", "delete a cluster", Writer, aliasOpt("d", "rm"))
AddBoolFlag(cmdKubeClusterDelete, doctl.ArgForce, doctl.ArgShortForce, false,
"force cluster delete")
AddBoolFlag(cmdKubeClusterDelete, doctl.ArgClusterUpdateKubeconfig, "", true,
"whether to remove the deleted cluster to your kubeconfig")
return cmd
}
func kubernetesKubeconfig() *Command {
cmd := &Command{
Command: &cobra.Command{
Use: "kubeconfig",
Aliases: []string{"kubecfg", "k8scfg", "config", "cfg"},
Short: "kubeconfig commands",
Long: "kubeconfig commands are used retrieve a cluster's credentials and manipulate them",
},
}
CmdBuilder(cmd, RunKubernetesKubeconfigShow, "show <cluster-id|cluster-name>", "show a cluster's kubeconfig to standard out", Writer, aliasOpt("p", "g"))
cmdExecCredential := CmdBuilder(cmd, RunKubernetesKubeconfigExecCredential, "exec-credential <cluster-id>", "INTERNAL print a cluster's exec credential", Writer, hiddenCmd())
AddStringFlag(cmdExecCredential, doctl.ArgVersion, "", "", "")
cmdSaveConfig := CmdBuilder(cmd, RunKubernetesKubeconfigSave, "save <cluster-id|cluster-name>", "save a cluster's credentials to your local kubeconfig", Writer, aliasOpt("s"))
AddBoolFlag(cmdSaveConfig, doctl.ArgSetCurrentContext, "", true, "whether to set the current kubectl context to that of the new cluster")
CmdBuilder(cmd, RunKubernetesKubeconfigRemove, "remove <cluster-id|cluster-name>", "remove a cluster's credentials from your local kubeconfig", Writer, aliasOpt("d", "rm"))
return cmd
}
func kubeconfigCachePath() string {
return filepath.Join(configHome(), "cache", "exec-credential")
}
func kubernetesNodePools() *Command {
cmd := &Command{
Command: &cobra.Command{
Use: "node-pool",
Aliases: []string{"node-pools", "nodepool", "nodepools", "pool", "pools", "np", "p"},
Short: "node pool commands",
Long: "node pool commands are used to act on a cluster's node pools",
},
}
CmdBuilder(cmd, RunKubernetesNodePoolGet, "get <cluster-id|cluster-name> <pool-id|pool-name>",
"get a cluster's node pool", Writer, aliasOpt("g"),
displayerType(&displayers.KubernetesNodePools{}))
CmdBuilder(cmd, RunKubernetesNodePoolList, "list <cluster-id|cluster-name>",
"list a cluster's node pools", Writer, aliasOpt("ls"),
displayerType(&displayers.KubernetesNodePools{}))
cmdKubeNodePoolCreate := CmdBuilder(cmd, RunKubernetesNodePoolCreate,
"create <cluster-id|cluster-name>", "create a new node pool for a cluster",
Writer, aliasOpt("c"))
AddStringFlag(cmdKubeNodePoolCreate, doctl.ArgNodePoolName, "", "",
"node pool name", requiredOpt())
AddStringFlag(cmdKubeNodePoolCreate, doctl.ArgSizeSlug, "", "",
"size of nodes in the node pool (see `doctl k8s options sizes`)", requiredOpt())
AddIntFlag(cmdKubeNodePoolCreate, doctl.ArgNodePoolCount, "", 0,
"count of nodes in the node pool", requiredOpt())
AddStringFlag(cmdKubeNodePoolCreate, doctl.ArgTag, "", "",
"tags to apply to the node pool, repeat to add multiple tags at once")
cmdKubeNodePoolUpdate := CmdBuilder(cmd, RunKubernetesNodePoolUpdate,
"update <cluster-id|cluster-name> <pool-id|pool-name>",
"update an existing node pool in a cluster", Writer, aliasOpt("u"))
AddStringFlag(cmdKubeNodePoolUpdate, doctl.ArgNodePoolName, "", "", "node pool name")
AddIntFlag(cmdKubeNodePoolUpdate, doctl.ArgNodePoolCount, "", 0,
"count of nodes in the node pool")
AddStringFlag(cmdKubeNodePoolUpdate, doctl.ArgTag, "", "",
"tags to apply to the node pool, repeat to add multiple tags at once")
cmdKubeNodePoolRecycle := CmdBuilder(cmd, RunKubernetesNodePoolRecycle,
"recycle <cluster-id|cluster-name> <pool-id|pool-name>", "DEPRECATED: use delete-node. Recycle nodes in a node pool", Writer, aliasOpt("r"), hiddenCmd())
AddStringFlag(cmdKubeNodePoolRecycle, doctl.ArgNodePoolNodeIDs, "", "",
"ID or name of the nodes in the node pool to recycle")
cmdKubeNodePoolDelete := CmdBuilder(cmd, RunKubernetesNodePoolDelete,
"delete <cluster-id|cluster-name> <pool-id|pool-name>",
"delete node pool from a cluster", Writer, aliasOpt("d", "rm"))
AddBoolFlag(cmdKubeNodePoolDelete, doctl.ArgForce, doctl.ArgShortForce,
false, "force node pool delete")
cmdKubeNodeDelete := CmdBuilder(cmd, RunKubernetesNodeDelete, "delete-node <cluster-id|cluster-name> <pool-id|pool-name> <node-id>", "delete node in a pool", Writer)
AddBoolFlag(cmdKubeNodeDelete, doctl.ArgForce, doctl.ArgShortForce, false, "force node delete")
AddBoolFlag(cmdKubeNodeDelete, "skip-drain", "", false, "skip draining the node before deletion")
cmdKubeNodeReplace := CmdBuilder(cmd, RunKubernetesNodeReplace, "replace-node <cluster-id|cluster-name> <pool-id|pool-name> <node-id>", "replace node in a pool with a new one", Writer)
AddBoolFlag(cmdKubeNodeReplace, doctl.ArgForce, doctl.ArgShortForce, false, "force node delete")
AddBoolFlag(cmdKubeNodeReplace, "skip-drain", "", false, "skip draining the node before deletion")
return cmd
}
func kubernetesOptions() *Command {
cmd := &Command{
Command: &cobra.Command{
Use: "options",
Aliases: []string{"opts", "o"},
Short: "options commands",
Long: "options commands are used to find options for Kubernetes clusters",
},
}
CmdBuilder(cmd, RunKubeOptionsListVersion, "versions",
"versions that can be used to create a Kubernetes cluster", Writer, aliasOpt("v"))
CmdBuilder(cmd, RunKubeOptionsListRegion, "regions",
"regions that can be used to create a Kubernetes cluster", Writer, aliasOpt("r"))
CmdBuilder(cmd, RunKubeOptionsListNodeSizes, "sizes",
"sizes that nodes in a Kubernetes cluster can have", Writer, aliasOpt("s"))
return cmd
}
// Clusters
// RunKubernetesClusterGet retrieves an existing kubernetes by its identifier.
func RunKubernetesClusterGet(c *CmdConfig) error {
if len(c.Args) != 1 {
return doctl.NewMissingArgsErr(c.NS)
}
clusterIDorName := c.Args[0]
cluster, err := clusterByIDorName(c.Kubernetes(), clusterIDorName)
if err != nil {
return err
}
return displayClusters(c, false, *cluster)
}
// RunKubernetesClusterList lists kubernetess.
func RunKubernetesClusterList(c *CmdConfig) error {
kube := c.Kubernetes()
list, err := kube.List()
if err != nil {
return err
}
return displayClusters(c, true, list...)
}
// RunKubernetesClusterGetUpgrades retrieves available upgrade versions for a cluster.
func RunKubernetesClusterGetUpgrades(c *CmdConfig) error {
if len(c.Args) != 1 {
return doctl.NewMissingArgsErr(c.NS)
}
clusterIDorName := c.Args[0]
clusterID, err := clusterIDize(c.Kubernetes(), clusterIDorName)
if err != nil {
return err
}
kube := c.Kubernetes()
upgrades, err := kube.GetUpgrades(clusterID)
if err != nil {
return err
}
item := &displayers.KubernetesVersions{KubernetesVersions: upgrades}
return c.Display(item)
}
// RunKubernetesClusterCreate creates a new kubernetes with a given configuration.
func RunKubernetesClusterCreate(defaultNodeSize string, defaultNodeCount int) func(*CmdConfig) error {
return func(c *CmdConfig) error {
if len(c.Args) != 1 {
return doctl.NewMissingArgsErr(c.NS)
}
clusterName := c.Args[0]
r := &godo.KubernetesClusterCreateRequest{Name: clusterName}
if err := buildClusterCreateRequestFromArgs(c, r, defaultNodeSize, defaultNodeCount); err != nil {
return err
}
wait, err := c.Doit.GetBool(c.NS, doctl.ArgCommandWait)
if err != nil {
return err
}
update, err := c.Doit.GetBool(c.NS, doctl.ArgClusterUpdateKubeconfig)
if err != nil {
return err
}
setCurrentContext, err := c.Doit.GetBool(c.NS, doctl.ArgSetCurrentContext)
if err != nil {
return err
}
kube := c.Kubernetes()
cluster, err := kube.Create(r)
if err != nil {
return err
}
if wait {
notice("cluster is provisioning, waiting for cluster to be running")
cluster, err = waitForClusterRunning(kube, cluster.ID)
if err != nil {
warn("cluster didn't become running: %v", err)
}
}
if update {
notice("cluster created, fetching credentials")
tryUpdateKubeconfig(kube, cluster.ID, clusterName, setCurrentContext)
}
return displayClusters(c, true, *cluster)
}
}
// RunKubernetesClusterUpdate updates an existing kubernetes with new configuration.
func RunKubernetesClusterUpdate(c *CmdConfig) error {
if len(c.Args) == 0 {
return doctl.NewMissingArgsErr(c.NS)
}
update, err := c.Doit.GetBool(c.NS, doctl.ArgClusterUpdateKubeconfig)
if err != nil {
return err
}
setCurrentContext, err := c.Doit.GetBool(c.NS, doctl.ArgSetCurrentContext)
if err != nil {
return err
}
clusterIDorName := c.Args[0]
clusterID, err := clusterIDize(c.Kubernetes(), clusterIDorName)
if err != nil {
return err
}
r := new(godo.KubernetesClusterUpdateRequest)
if err := buildClusterUpdateRequestFromArgs(c, r); err != nil {
return err
}
kube := c.Kubernetes()
cluster, err := kube.Update(clusterID, r)
if err != nil {
return err
}
if update {
notice("cluster updated, fetching new credentials")
tryUpdateKubeconfig(kube, clusterID, clusterIDorName, setCurrentContext)
}
return displayClusters(c, true, *cluster)
}
func tryUpdateKubeconfig(kube do.KubernetesService, clusterID, clusterName string, setCurrentContext bool) {
var (
kubeconfig []byte
err error
)
ctx, cancel := context.WithTimeout(context.TODO(), timeoutFetchingKubeconfig)
defer cancel()
for {
kubeconfig, err = kube.GetKubeConfig(clusterID)
if err != nil {
select {
case <-ctx.Done():
warn("couldn't get credentials for cluster, it will not be added to your kubeconfig: %v", err)
return
case <-time.After(time.Second):
}
} else {
break
}
}
if err := writeOrAddToKubeconfig(clusterID, kubeconfig, setCurrentContext); err != nil {
warn("couldn't write cluster credentials: %v", err)
}
}
// RunKubernetesClusterUpgrade upgrades an existing cluster to a new version.
func RunKubernetesClusterUpgrade(c *CmdConfig) error {
if len(c.Args) == 0 {
return doctl.NewMissingArgsErr(c.NS)
}
clusterID, err := clusterIDize(c.Kubernetes(), c.Args[0])
if err != nil {
return err
}
version, available, err := getUpgradeVersionOrLatest(c, clusterID)
if err != nil {
return err
}
if !available {
notice("cluster is already up-to-date - no upgrades available")
return nil
}
kube := c.Kubernetes()
err = kube.Upgrade(clusterID, version)
if err != nil {
return err
}
notice("upgrading cluster to version %v", version)
return nil
}
func getUpgradeVersionOrLatest(c *CmdConfig, clusterID string) (string, bool, error) {
version, err := c.Doit.GetString(c.NS, doctl.ArgClusterVersionSlug)
if err != nil {
return "", false, err
}
if version != "" && version != defaultKubernetesLatestVersion {
return version, true, nil
}
cluster, err := c.Kubernetes().Get(clusterID)
if err != nil {
return "", false, fmt.Errorf("unable to lookup cluster to find the latest version from the API: %v", err)
}
versions, err := c.Kubernetes().GetUpgrades(clusterID)
if err != nil {
return "", false, fmt.Errorf("unable to lookup the latest version from the API: %v", err)
}
if len(versions) == 0 {
return "", false, nil
}
return latestVersionForUpgrade(cluster.VersionSlug, versions)
}
// latestVersionForUpgrade returns the newest patch version from `versions` for
// the minor version of `clusterVersionSlug`. This ensures we never use a
// different minor version than a cluster is running as "latest" for an upgrade,
// since we want minor version upgrades to be an explicit operation.
func latestVersionForUpgrade(clusterVersionSlug string, versions []do.KubernetesVersion) (string, bool, error) {
clusterSV, err := semver.Parse(clusterVersionSlug)
if err != nil {
return "", false, err
}
clusterBucket := fmt.Sprintf("%d.%d", clusterSV.Major, clusterSV.Minor)
// Sort releases into minor-version buckets.
var serr error
releases := versionMapBy(versions, func(v do.KubernetesVersion) string {
sv, err := semver.Parse(v.Slug)
if err != nil {
serr = err
return ""
}
return fmt.Sprintf("%d.%d", sv.Major, sv.Minor)
})
if serr != nil {
return "", false, serr
}
// Find the cluster's minor version in the bucketized available versions.
bucket, ok := releases[clusterBucket]
if !ok {
// No upgrades available within the cluster's minor version.
return "", false, nil
}
// Find the latest version within the bucket.
i, err := versionMaxBy(bucket, func(v do.KubernetesVersion) string {
return v.Slug
})
if err != nil {
return "", false, err
}
return bucket[i].Slug, true, nil
}
// RunKubernetesClusterDelete deletes a Kubernetes cluster
func RunKubernetesClusterDelete(c *CmdConfig) error {
if len(c.Args) != 1 {
return doctl.NewMissingArgsErr(c.NS)
}
update, err := c.Doit.GetBool(c.NS, doctl.ArgClusterUpdateKubeconfig)
if err != nil {
return err
}
clusterID, err := clusterIDize(c.Kubernetes(), c.Args[0])
if err != nil {
return err
}
force, err := c.Doit.GetBool(c.NS, doctl.ArgForce)
if err != nil {
return err
}
if force || AskForConfirm("delete this Kubernetes cluster") == nil {
// continue
} else {
return fmt.Errorf("operation aborted")
}
kube := c.Kubernetes()
var kubeconfig []byte
if update {
// get the cluster's kubeconfig before issuing the delete, so that we can
// cleanup the entry from the local file
kubeconfig, err = kube.GetKubeConfig(clusterID)
if err != nil {
warn("couldn't get credentials for cluster, it will not be remove from your kubeconfig")
}
}
if err := kube.Delete(clusterID); err != nil {
return err
}
if kubeconfig != nil {
notice("cluster deleted, removing credentials")
if err := removeFromKubeconfig(kubeconfig); err != nil {
warn("Cluster was deleted, but we couldn't remove it from your local kubeconfig. Try doing it manually.")
}
}
return nil
}
// Kubeconfig
// RunKubernetesKubeconfigShow retrieves an existing kubernetes config and prints it.
func RunKubernetesKubeconfigShow(c *CmdConfig) error {
if len(c.Args) != 1 {
return doctl.NewMissingArgsErr(c.NS)
}
kube := c.Kubernetes()
clusterID, err := clusterIDize(kube, c.Args[0])
if err != nil {
return err
}
kubeconfig, err := kube.GetKubeConfig(clusterID)
if err != nil {
return err
}
_, err = c.Out.Write(kubeconfig)
return err
}
func cachedExecCredentialPath(id string) string {
return filepath.Join(kubeconfigCachePath(), id+".json")
}
// loadCachedExecCredential attempts to load the cached exec credential from disk. Never errors
// Returns nil if there's no credential, if it failed to load it, or if it's expired.
func loadCachedExecCredential(id string) (*clientauthentication.ExecCredential, error) {
path := cachedExecCredentialPath(id)
f, err := os.Open(path)
if err != nil {
if os.IsNotExist(err) {
return nil, nil
}
return nil, err
}
defer f.Close()
var execCredential *clientauthentication.ExecCredential
if err := json.NewDecoder(f).Decode(&execCredential); err != nil {
return nil, err
}
if execCredential.Status == nil {
// Invalid ExecCredential, remove it
err = os.Remove(path)
return nil, err
}
t := execCredential.Status.ExpirationTimestamp
if t.IsZero() || t.Time.Before(time.Now()) {
err = os.Remove(path)
return nil, err
}
return execCredential, nil
}
// cacheExecCredential caches an ExecCredential to the doctl cache directory
func cacheExecCredential(id string, execCredential *clientauthentication.ExecCredential) error {
// Don't bother caching if there's no expiration set
if execCredential.Status.ExpirationTimestamp.IsZero() {
return nil
}
cachePath := kubeconfigCachePath()
if err := os.MkdirAll(cachePath, os.FileMode(0700)); err != nil {
return err
}
path := cachedExecCredentialPath(id)
f, err := os.OpenFile(path, os.O_CREATE|os.O_RDWR|os.O_TRUNC, os.FileMode(0600))
if err != nil {
return err
}
defer f.Close()
return json.NewEncoder(f).Encode(execCredential)
}
// RunKubernetesKubeconfigExecCredential displays the exec credential. It is for internal use only.
func RunKubernetesKubeconfigExecCredential(c *CmdConfig) error {
if len(c.Args) != 1 {
return doctl.NewMissingArgsErr(c.NS)
}
version, err := c.Doit.GetString(c.NS, doctl.ArgVersion)
if err != nil {
return err
}
if version != "v1beta1" {
return fmt.Errorf("invalid version %q expected 'v1beta1'", version)
}
kube := c.Kubernetes()
clusterID := c.Args[0]
execCredential, err := loadCachedExecCredential(clusterID)
if err != nil && Verbose {
warn("%v", err)
}
if execCredential != nil {
return json.NewEncoder(c.Out).Encode(execCredential)
}
kubeconfig, err := kube.GetKubeConfig(clusterID)
if err != nil {
if errResponse, ok := err.(*godo.ErrorResponse); ok {
return fmt.Errorf("failed to fetch credentials for cluster %q: %v", clusterID, errResponse.Message)
}
return err
}
config, err := clientcmd.Load(kubeconfig)
if err != nil {
return err
}
execCredential, err = execCredentialFromConfig(config)
if err != nil {
return err
}
// Don't error out when caching credentials, just print it if we're being verbose
if err := cacheExecCredential(clusterID, execCredential); err != nil && Verbose {
warn("%v", err)
}
return json.NewEncoder(c.Out).Encode(execCredential)
}
func execCredentialFromConfig(config *clientcmdapi.Config) (*clientauthentication.ExecCredential, error) {
current := config.CurrentContext
context, ok := config.Contexts[current]
if !ok {
return nil, fmt.Errorf("received invalid config Context %q from API. Please file an issue at https://github.com/digitalocean/doctl/issues/new mentioning this error", current)
}
authInfo, ok := config.AuthInfos[context.AuthInfo]
if !ok {
return nil, fmt.Errorf("received invalid config AuthInfo %q from API. Please file an issue at https://github.com/digitalocean/doctl/issues/new mentioning this error", context.AuthInfo)
}
var t *metav1.Time
// Attempt to parse certificate to extract expiration. If it fails that's OK, maybe we've migrated to tokens
block, _ := pem.Decode(authInfo.ClientCertificateData)
if cert, err := x509.ParseCertificate(block.Bytes); err == nil && !cert.NotAfter.IsZero() {
// Expire the credentials 10 minutes before NotAfter to account for clock skew
t = &metav1.Time{Time: cert.NotAfter.Add(-10 * time.Minute)}
}
execCredential := &clientauthentication.ExecCredential{
TypeMeta: metav1.TypeMeta{
Kind: "ExecCredential",
APIVersion: clientauthentication.SchemeGroupVersion.String(),
},
Status: &clientauthentication.ExecCredentialStatus{
ClientCertificateData: string(authInfo.ClientCertificateData),
ClientKeyData: string(authInfo.ClientKeyData),
ExpirationTimestamp: t,
Token: authInfo.Token,
},
}
return execCredential, nil
}
// RunKubernetesKubeconfigSave retrieves an existing kubernetes config and saves it to your local kubeconfig.
func RunKubernetesKubeconfigSave(c *CmdConfig) error {
if len(c.Args) != 1 {
return doctl.NewMissingArgsErr(c.NS)
}
kube := c.Kubernetes()
clusterID, err := clusterIDize(kube, c.Args[0])
if err != nil {
return err
}
kubeconfig, err := kube.GetKubeConfig(clusterID)
if err != nil {
return err
}
setCurrentContext, err := c.Doit.GetBool(c.NS, doctl.ArgSetCurrentContext)
if err != nil {
return err
}
return writeOrAddToKubeconfig(clusterID, kubeconfig, setCurrentContext)
}
// RunKubernetesKubeconfigRemove retrieves an existing kubernetes config and removes it from your local kubeconfig.
func RunKubernetesKubeconfigRemove(c *CmdConfig) error {
if len(c.Args) != 1 {
return doctl.NewMissingArgsErr(c.NS)
}
kube := c.Kubernetes()
clusterID, err := clusterIDize(kube, c.Args[0])
if err != nil {
return err
}
kubeconfig, err := kube.GetKubeConfig(clusterID)
if err != nil {
return err
}
return removeFromKubeconfig(kubeconfig)
}
// Node Pools
// RunKubernetesNodePoolGet retrieves an existing cluster node pool by its identifier.
func RunKubernetesNodePoolGet(c *CmdConfig) error {
if len(c.Args) != 2 {
return doctl.NewMissingArgsErr(c.NS)
}
clusterID, err := clusterIDize(c.Kubernetes(), c.Args[0])
if err != nil {
return err
}
nodePool, err := poolByIDorName(c.Kubernetes(), clusterID, c.Args[1])
if err != nil {
return err
}
return displayNodePools(c, *nodePool)
}
// RunKubernetesNodePoolList lists cluster node pool.
func RunKubernetesNodePoolList(c *CmdConfig) error {
if len(c.Args) != 1 {
return doctl.NewMissingArgsErr(c.NS)
}
clusterID, err := clusterIDize(c.Kubernetes(), c.Args[0])
if err != nil {
return err
}
kube := c.Kubernetes()
list, err := kube.ListNodePools(clusterID)
if err != nil {
return err
}
return displayNodePools(c, list...)
}
// RunKubernetesNodePoolCreate creates a new cluster node pool with a given configuration.
func RunKubernetesNodePoolCreate(c *CmdConfig) error {
if len(c.Args) != 1 {
return doctl.NewMissingArgsErr(c.NS)
}
clusterID, err := clusterIDize(c.Kubernetes(), c.Args[0])
if err != nil {
return err
}
r := new(godo.KubernetesNodePoolCreateRequest)
if err := buildNodePoolCreateRequestFromArgs(c, r); err != nil {
return err
}
kube := c.Kubernetes()
nodePool, err := kube.CreateNodePool(clusterID, r)
if err != nil {
return err
}
return displayNodePools(c, *nodePool)
}
// RunKubernetesNodePoolUpdate updates an existing cluster node pool with new properties.
func RunKubernetesNodePoolUpdate(c *CmdConfig) error {
if len(c.Args) != 2 {
return doctl.NewMissingArgsErr(c.NS)
}
clusterID, err := clusterIDize(c.Kubernetes(), c.Args[0])
if err != nil {
return err
}
poolID, err := poolIDize(c.Kubernetes(), clusterID, c.Args[1])
if err != nil {
return err
}
r := new(godo.KubernetesNodePoolUpdateRequest)
if err := buildNodePoolUpdateRequestFromArgs(c, r); err != nil {
return err
}
kube := c.Kubernetes()
nodePool, err := kube.UpdateNodePool(clusterID, poolID, r)
if err != nil {
return err
}
return displayNodePools(c, *nodePool)
}
// RunKubernetesNodePoolRecycle DEPRECATED: will be removed in v2.0, please use delete-node or replace-node
func RunKubernetesNodePoolRecycle(c *CmdConfig) error {
if len(c.Args) != 2 {
return doctl.NewMissingArgsErr(c.NS)
}
clusterID, err := clusterIDize(c.Kubernetes(), c.Args[0])
if err != nil {
return err
}
poolID, err := poolIDize(c.Kubernetes(), clusterID, c.Args[1])
if err != nil {
return err
}
r := new(godo.KubernetesNodePoolRecycleNodesRequest)
if err := buildNodePoolRecycleRequestFromArgs(c, clusterID, poolID, r); err != nil {
return err
}
kube := c.Kubernetes()
return kube.RecycleNodePoolNodes(clusterID, poolID, r)
}
// RunKubernetesNodePoolDelete deletes a Kubernetes node pool
func RunKubernetesNodePoolDelete(c *CmdConfig) error {
if len(c.Args) != 2 {
return doctl.NewMissingArgsErr(c.NS)
}
clusterID, err := clusterIDize(c.Kubernetes(), c.Args[0])
if err != nil {
return err
}
poolID, err := poolIDize(c.Kubernetes(), clusterID, c.Args[1])
if err != nil {
return err
}
force, err := c.Doit.GetBool(c.NS, doctl.ArgForce)
if err != nil {
return err
}
if force || AskForConfirm("delete this Kubernetes node pool") == nil {
kube := c.Kubernetes()
if err := kube.DeleteNodePool(clusterID, poolID); err != nil {
return err
}
} else {
return fmt.Errorf("operation aborted")
}
return nil
}
// RunKubernetesNodeDelete deletes a Kubernetes Node
func RunKubernetesNodeDelete(c *CmdConfig) error {
return kubernetesNodeDelete(false, c)
}
// RunKubernetesNodeReplace replaces a Kubernetes Node
func RunKubernetesNodeReplace(c *CmdConfig) error {
return kubernetesNodeDelete(true, c)
}
func kubernetesNodeDelete(replace bool, c *CmdConfig) error {
if len(c.Args) != 3 {
return doctl.NewMissingArgsErr(c.NS)
}
clusterID, err := clusterIDize(c.Kubernetes(), c.Args[0])
if err != nil {
return err
}
poolID, err := poolIDize(c.Kubernetes(), clusterID, c.Args[1])
if err != nil {
return err
}
nodeID := c.Args[2]
force, err := c.Doit.GetBool(c.NS, doctl.ArgForce)
if err != nil {
return err
}
msg := "delete this Kubernetes node"
if replace {
msg = "replace this Kubernetes node"
}
if !(force || AskForConfirm(msg) == nil) {
return fmt.Errorf("operation aborted")
}
skipDrain, err := c.Doit.GetBool(c.NS, "skip-drain")
if err != nil {
return err
}
kube := c.Kubernetes()
return kube.DeleteNode(clusterID, poolID, nodeID, &godo.KubernetesNodeDeleteRequest{
Replace: replace,
SkipDrain: skipDrain,
})
}
// RunKubeOptionsListVersion lists valid versions for kubernetes clusters.
func RunKubeOptionsListVersion(c *CmdConfig) error {
kube := c.Kubernetes()
versions, err := kube.GetVersions()
if err != nil {
return err
}
item := &displayers.KubernetesVersions{KubernetesVersions: versions}
return c.Display(item)
}
// RunKubeOptionsListRegion lists valid regions for kubernetes clusters.