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cluster.go
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cluster.go
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package commands
import (
"context"
"fmt"
"io/ioutil"
"os"
"sort"
"strings"
"text/tabwriter"
"github.com/ghodss/yaml"
log "github.com/sirupsen/logrus"
"github.com/spf13/cobra"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
"github.com/argoproj/argo-cd/common"
"github.com/argoproj/argo-cd/errors"
argocdclient "github.com/argoproj/argo-cd/pkg/apiclient"
clusterpkg "github.com/argoproj/argo-cd/pkg/apiclient/cluster"
argoappv1 "github.com/argoproj/argo-cd/pkg/apis/application/v1alpha1"
"github.com/argoproj/argo-cd/util"
"github.com/argoproj/argo-cd/util/clusterauth"
)
// NewClusterCommand returns a new instance of an `argocd cluster` command
func NewClusterCommand(clientOpts *argocdclient.ClientOptions, pathOpts *clientcmd.PathOptions) *cobra.Command {
var command = &cobra.Command{
Use: "cluster",
Short: "Manage cluster credentials",
Run: func(c *cobra.Command, args []string) {
c.HelpFunc()(c, args)
os.Exit(1)
},
}
command.AddCommand(NewClusterAddCommand(clientOpts, pathOpts))
command.AddCommand(NewClusterGetCommand(clientOpts))
command.AddCommand(NewClusterListCommand(clientOpts))
command.AddCommand(NewClusterRemoveCommand(clientOpts))
command.AddCommand(NewClusterRotateAuthCommand(clientOpts))
return command
}
// NewClusterAddCommand returns a new instance of an `argocd cluster add` command
func NewClusterAddCommand(clientOpts *argocdclient.ClientOptions, pathOpts *clientcmd.PathOptions) *cobra.Command {
var (
inCluster bool
upsert bool
awsRoleArn string
awsClusterName string
systemNamespace string
)
var command = &cobra.Command{
Use: "add",
Short: fmt.Sprintf("%s cluster add CONTEXT", cliName),
Run: func(c *cobra.Command, args []string) {
var configAccess clientcmd.ConfigAccess = pathOpts
if len(args) == 0 {
log.Error("Choose a context name from:")
printKubeContexts(configAccess)
os.Exit(1)
}
config, err := configAccess.GetStartingConfig()
errors.CheckError(err)
clstContext := config.Contexts[args[0]]
if clstContext == nil {
log.Fatalf("Context %s does not exist in kubeconfig", args[0])
}
overrides := clientcmd.ConfigOverrides{
Context: *clstContext,
}
clientConfig := clientcmd.NewDefaultClientConfig(*config, &overrides)
conf, err := clientConfig.ClientConfig()
errors.CheckError(err)
managerBearerToken := ""
var awsAuthConf *argoappv1.AWSAuthConfig
if awsClusterName != "" {
awsAuthConf = &argoappv1.AWSAuthConfig{
ClusterName: awsClusterName,
RoleARN: awsRoleArn,
}
} else {
// Install RBAC resources for managing the cluster
clientset, err := kubernetes.NewForConfig(conf)
errors.CheckError(err)
managerBearerToken, err = clusterauth.InstallClusterManagerRBAC(clientset, systemNamespace)
errors.CheckError(err)
}
conn, clusterIf := argocdclient.NewClientOrDie(clientOpts).NewClusterClientOrDie()
defer util.Close(conn)
clst := NewCluster(args[0], conf, managerBearerToken, awsAuthConf)
if inCluster {
clst.Server = common.KubernetesInternalAPIServerAddr
}
clstCreateReq := clusterpkg.ClusterCreateRequest{
Cluster: clst,
Upsert: upsert,
}
clst, err = clusterIf.Create(context.Background(), &clstCreateReq)
errors.CheckError(err)
fmt.Printf("Cluster '%s' added\n", clst.Name)
},
}
command.PersistentFlags().StringVar(&pathOpts.LoadingRules.ExplicitPath, pathOpts.ExplicitFileFlag, pathOpts.LoadingRules.ExplicitPath, "use a particular kubeconfig file")
command.Flags().BoolVar(&inCluster, "in-cluster", false, "Indicates Argo CD resides inside this cluster and should connect using the internal k8s hostname (kubernetes.default.svc)")
command.Flags().BoolVar(&upsert, "upsert", false, "Override an existing cluster with the same name even if the spec differs")
command.Flags().StringVar(&awsClusterName, "aws-cluster-name", "", "AWS Cluster name if set then aws-iam-authenticator will be used to access cluster")
command.Flags().StringVar(&awsRoleArn, "aws-role-arn", "", "Optional AWS role arn. If set then AWS IAM Authenticator assume a role to perform cluster operations instead of the default AWS credential provider chain.")
command.Flags().StringVar(&systemNamespace, "system-namespace", common.DefaultSystemNamespace, "Use different system namespace")
return command
}
func printKubeContexts(ca clientcmd.ConfigAccess) {
config, err := ca.GetStartingConfig()
errors.CheckError(err)
w := tabwriter.NewWriter(os.Stdout, 0, 0, 2, ' ', 0)
defer func() { _ = w.Flush() }()
columnNames := []string{"CURRENT", "NAME", "CLUSTER", "SERVER"}
_, err = fmt.Fprintf(w, "%s\n", strings.Join(columnNames, "\t"))
errors.CheckError(err)
// sort names so output is deterministic
contextNames := make([]string, 0)
for name := range config.Contexts {
contextNames = append(contextNames, name)
}
sort.Strings(contextNames)
if config.Clusters == nil {
return
}
for _, name := range contextNames {
// ignore malformed kube config entries
context := config.Contexts[name]
if context == nil {
continue
}
cluster := config.Clusters[context.Cluster]
if cluster == nil {
continue
}
prefix := " "
if config.CurrentContext == name {
prefix = "*"
}
_, err := fmt.Fprintf(w, "%s\t%s\t%s\t%s\n", prefix, name, context.Cluster, cluster.Server)
errors.CheckError(err)
}
}
func NewCluster(name string, conf *rest.Config, managerBearerToken string, awsAuthConf *argoappv1.AWSAuthConfig) *argoappv1.Cluster {
tlsClientConfig := argoappv1.TLSClientConfig{
Insecure: conf.TLSClientConfig.Insecure,
ServerName: conf.TLSClientConfig.ServerName,
CAData: conf.TLSClientConfig.CAData,
}
if len(conf.TLSClientConfig.CAData) == 0 && conf.TLSClientConfig.CAFile != "" {
data, err := ioutil.ReadFile(conf.TLSClientConfig.CAFile)
errors.CheckError(err)
tlsClientConfig.CAData = data
}
clst := argoappv1.Cluster{
Server: conf.Host,
Name: name,
Config: argoappv1.ClusterConfig{
BearerToken: managerBearerToken,
TLSClientConfig: tlsClientConfig,
AWSAuthConfig: awsAuthConf,
},
}
return &clst
}
// NewClusterGetCommand returns a new instance of an `argocd cluster get` command
func NewClusterGetCommand(clientOpts *argocdclient.ClientOptions) *cobra.Command {
var command = &cobra.Command{
Use: "get CLUSTER",
Short: "Get cluster information",
Run: func(c *cobra.Command, args []string) {
if len(args) == 0 {
c.HelpFunc()(c, args)
os.Exit(1)
}
conn, clusterIf := argocdclient.NewClientOrDie(clientOpts).NewClusterClientOrDie()
defer util.Close(conn)
for _, clusterName := range args {
clst, err := clusterIf.Get(context.Background(), &clusterpkg.ClusterQuery{Server: clusterName})
errors.CheckError(err)
yamlBytes, err := yaml.Marshal(clst)
errors.CheckError(err)
fmt.Printf("%v", string(yamlBytes))
}
},
}
return command
}
// NewClusterRemoveCommand returns a new instance of an `argocd cluster list` command
func NewClusterRemoveCommand(clientOpts *argocdclient.ClientOptions) *cobra.Command {
var command = &cobra.Command{
Use: "rm CLUSTER",
Short: "Remove cluster credentials",
Run: func(c *cobra.Command, args []string) {
if len(args) == 0 {
c.HelpFunc()(c, args)
os.Exit(1)
}
conn, clusterIf := argocdclient.NewClientOrDie(clientOpts).NewClusterClientOrDie()
defer util.Close(conn)
// clientset, err := kubernetes.NewForConfig(conf)
// errors.CheckError(err)
for _, clusterName := range args {
// TODO(jessesuen): find the right context and remove manager RBAC artifacts
// err := clusterauth.UninstallClusterManagerRBAC(clientset)
// errors.CheckError(err)
_, err := clusterIf.Delete(context.Background(), &clusterpkg.ClusterQuery{Server: clusterName})
errors.CheckError(err)
}
},
}
return command
}
// Print table of cluster information
func printClusterTable(clusters []argoappv1.Cluster) {
w := tabwriter.NewWriter(os.Stdout, 0, 0, 2, ' ', 0)
_, _ = fmt.Fprintf(w, "SERVER\tNAME\tVERSION\tSTATUS\tMESSAGE\n")
for _, c := range clusters {
_, _ = fmt.Fprintf(w, "%s\t%s\t%s\t%s\t%s\n", c.Server, c.Name, c.ServerVersion, c.ConnectionState.Status, c.ConnectionState.Message)
}
_ = w.Flush()
}
// Print list of cluster servers
func printClusterServers(clusters []argoappv1.Cluster) {
for _, c := range clusters {
fmt.Println(c.Server)
}
}
// NewClusterListCommand returns a new instance of an `argocd cluster rm` command
func NewClusterListCommand(clientOpts *argocdclient.ClientOptions) *cobra.Command {
var (
output string
)
var command = &cobra.Command{
Use: "list",
Short: "List configured clusters",
Run: func(c *cobra.Command, args []string) {
conn, clusterIf := argocdclient.NewClientOrDie(clientOpts).NewClusterClientOrDie()
defer util.Close(conn)
clusters, err := clusterIf.List(context.Background(), &clusterpkg.ClusterQuery{})
errors.CheckError(err)
if output == "server" {
printClusterServers(clusters.Items)
} else {
printClusterTable(clusters.Items)
}
},
}
command.Flags().StringVarP(&output, "output", "o", "wide", "Output format. One of: wide|server")
return command
}
// NewClusterRotateAuthCommand returns a new instance of an `argocd cluster rotate-auth` command
func NewClusterRotateAuthCommand(clientOpts *argocdclient.ClientOptions) *cobra.Command {
var command = &cobra.Command{
Use: "rotate-auth CLUSTER",
Short: fmt.Sprintf("%s cluster rotate-auth CLUSTER", cliName),
Run: func(c *cobra.Command, args []string) {
if len(args) != 1 {
c.HelpFunc()(c, args)
os.Exit(1)
}
conn, clusterIf := argocdclient.NewClientOrDie(clientOpts).NewClusterClientOrDie()
defer util.Close(conn)
clusterQuery := clusterpkg.ClusterQuery{
Server: args[0],
}
_, err := clusterIf.RotateAuth(context.Background(), &clusterQuery)
errors.CheckError(err)
fmt.Printf("Cluster '%s' rotated auth\n", clusterQuery.Server)
},
}
return command
}