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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"
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"
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/clusterauth"
"github.com/argoproj/argo-cd/util/errors"
"github.com/argoproj/argo-cd/util/io"
)
// 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)
},
Example: ` # List all known clusters in JSON format:
argocd cluster list -o json
# Add a target cluster configuration to ArgoCD. The context must exist in your kubectl config:
argocd cluster add example-cluster
# Get specific details about a cluster in plain text (wide) format:
argocd cluster get example-cluster -o wide
# Remove a target cluster context from ArgoCD
argocd cluster rm example-cluster
`,
}
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
serviceAccount string
awsRoleArn string
awsClusterName string
systemNamespace string
namespaces []string
name string
shard int64
execProviderCommand string
execProviderArgs []string
execProviderEnv map[string]string
execProviderAPIVersion string
execProviderInstallHint string
)
var command = &cobra.Command{
Use: "add CONTEXT",
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)
contextName := args[0]
clstContext := config.Contexts[contextName]
if clstContext == nil {
log.Fatalf("Context %s does not exist in kubeconfig", contextName)
}
overrides := clientcmd.ConfigOverrides{
Context: *clstContext,
}
clientConfig := clientcmd.NewDefaultClientConfig(*config, &overrides)
conf, err := clientConfig.ClientConfig()
errors.CheckError(err)
managerBearerToken := ""
var awsAuthConf *argoappv1.AWSAuthConfig
var execProviderConf *argoappv1.ExecProviderConfig
if awsClusterName != "" {
awsAuthConf = &argoappv1.AWSAuthConfig{
ClusterName: awsClusterName,
RoleARN: awsRoleArn,
}
} else if execProviderCommand != "" {
execProviderConf = &argoappv1.ExecProviderConfig{
Command: execProviderCommand,
Args: execProviderArgs,
Env: execProviderEnv,
APIVersion: execProviderAPIVersion,
InstallHint: execProviderInstallHint,
}
} else {
// Install RBAC resources for managing the cluster
clientset, err := kubernetes.NewForConfig(conf)
errors.CheckError(err)
if serviceAccount != "" {
managerBearerToken, err = clusterauth.GetServiceAccountBearerToken(clientset, systemNamespace, serviceAccount)
} else {
managerBearerToken, err = clusterauth.InstallClusterManagerRBAC(clientset, systemNamespace, namespaces)
}
errors.CheckError(err)
}
conn, clusterIf := argocdclient.NewClientOrDie(clientOpts).NewClusterClientOrDie()
defer io.Close(conn)
if name != "" {
contextName = name
}
clst := newCluster(contextName, namespaces, conf, managerBearerToken, awsAuthConf, execProviderConf)
if inCluster {
clst.Server = common.KubernetesInternalAPIServerAddr
}
if shard >= 0 {
clst.Shard = &shard
}
clstCreateReq := clusterpkg.ClusterCreateRequest{
Cluster: clst,
Upsert: upsert,
}
_, err = clusterIf.Create(context.Background(), &clstCreateReq)
errors.CheckError(err)
fmt.Printf("Cluster '%s' added\n", clst.Server)
},
}
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(&serviceAccount, "service-account", "", fmt.Sprintf("System namespace service account to use for kubernetes resource management. If not set then default \"%s\" SA will be created", clusterauth.ArgoCDManagerServiceAccount))
command.Flags().StringVar(&awsClusterName, "aws-cluster-name", "", "AWS Cluster name if set then aws cli eks token command 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")
command.Flags().StringArrayVar(&namespaces, "namespace", nil, "List of namespaces which are allowed to manage")
command.Flags().StringVar(&name, "name", "", "Overwrite the cluster name")
command.Flags().Int64Var(&shard, "shard", -1, "Cluster shard number; inferred from hostname if not set")
command.Flags().StringVar(&execProviderCommand, "exec-command", "", "Command to run to provide client credentials to the cluster. You may need to build a custom ArgoCD image to ensure the command is available at runtime.")
command.Flags().StringArrayVar(&execProviderArgs, "exec-command-args", nil, "Arguments to supply to the --exec-command command")
command.Flags().StringToStringVar(&execProviderEnv, "exec-command-env", nil, "Environment vars to set when running the --exec-command command")
command.Flags().StringVar(&execProviderAPIVersion, "exec-command-api-version", "", "Preferred input version of the ExecInfo for the --exec-command")
command.Flags().StringVar(&execProviderInstallHint, "exec-command-install-hint", "", "Text shown to the user when the --exec-command executable doesn't seem to be present")
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, namespaces []string, conf *rest.Config, managerBearerToken string, awsAuthConf *argoappv1.AWSAuthConfig, execProviderConf *argoappv1.ExecProviderConfig) *argoappv1.Cluster {
tlsClientConfig := argoappv1.TLSClientConfig{
Insecure: conf.TLSClientConfig.Insecure,
ServerName: conf.TLSClientConfig.ServerName,
CAData: conf.TLSClientConfig.CAData,
CertData: conf.TLSClientConfig.CertData,
KeyData: conf.TLSClientConfig.KeyData,
}
if len(conf.TLSClientConfig.CAData) == 0 && conf.TLSClientConfig.CAFile != "" {
data, err := ioutil.ReadFile(conf.TLSClientConfig.CAFile)
errors.CheckError(err)
tlsClientConfig.CAData = data
}
if len(conf.TLSClientConfig.CertData) == 0 && conf.TLSClientConfig.CertFile != "" {
data, err := ioutil.ReadFile(conf.TLSClientConfig.CertFile)
errors.CheckError(err)
tlsClientConfig.CertData = data
}
if len(conf.TLSClientConfig.KeyData) == 0 && conf.TLSClientConfig.KeyFile != "" {
data, err := ioutil.ReadFile(conf.TLSClientConfig.KeyFile)
errors.CheckError(err)
tlsClientConfig.KeyData = data
}
clst := argoappv1.Cluster{
Server: conf.Host,
Name: name,
Namespaces: namespaces,
Config: argoappv1.ClusterConfig{
TLSClientConfig: tlsClientConfig,
AWSAuthConfig: awsAuthConf,
ExecProviderConfig: execProviderConf,
},
}
// Bearer token will preferentially be used for auth if present,
// Even in presence of key/cert credentials
// So set bearer token only if the key/cert data is absent
if len(tlsClientConfig.CertData) == 0 || len(tlsClientConfig.KeyData) == 0 {
clst.Config.BearerToken = managerBearerToken
}
return &clst
}
// NewClusterGetCommand returns a new instance of an `argocd cluster get` command
func NewClusterGetCommand(clientOpts *argocdclient.ClientOptions) *cobra.Command {
var (
output string
)
var command = &cobra.Command{
Use: "get SERVER",
Short: "Get cluster information",
Example: `argocd cluster get https://12.34.567.89`,
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 io.Close(conn)
clusters := make([]argoappv1.Cluster, 0)
for _, clusterName := range args {
clst, err := clusterIf.Get(context.Background(), &clusterpkg.ClusterQuery{Server: clusterName})
errors.CheckError(err)
clusters = append(clusters, *clst)
}
switch output {
case "yaml", "json":
err := PrintResourceList(clusters, output, true)
errors.CheckError(err)
case "wide", "":
printClusterDetails(clusters)
case "server":
printClusterServers(clusters)
default:
errors.CheckError(fmt.Errorf("unknown output format: %s", output))
}
},
}
// we have yaml as default to not break backwards-compatibility
command.Flags().StringVarP(&output, "output", "o", "yaml", "Output format. One of: json|yaml|wide|server")
return command
}
func strWithDefault(value string, def string) string {
if value == "" {
return def
}
return value
}
func formatNamespaces(cluster argoappv1.Cluster) string {
if len(cluster.Namespaces) == 0 {
return "all namespaces"
}
return strings.Join(cluster.Namespaces, ", ")
}
func printClusterDetails(clusters []argoappv1.Cluster) {
for _, cluster := range clusters {
fmt.Printf("Cluster information\n\n")
fmt.Printf(" Server URL: %s\n", cluster.Server)
fmt.Printf(" Server Name: %s\n", strWithDefault(cluster.Name, "-"))
fmt.Printf(" Server Version: %s\n", cluster.ServerVersion)
fmt.Printf(" Namespaces: %s\n", formatNamespaces(cluster))
fmt.Printf("\nTLS configuration\n\n")
fmt.Printf(" Client cert: %v\n", string(cluster.Config.TLSClientConfig.CertData) != "")
fmt.Printf(" Cert validation: %v\n", !cluster.Config.TLSClientConfig.Insecure)
fmt.Printf("\nAuthentication\n\n")
fmt.Printf(" Basic authentication: %v\n", cluster.Config.Username != "")
fmt.Printf(" oAuth authentication: %v\n", cluster.Config.BearerToken != "")
fmt.Printf(" AWS authentication: %v\n", cluster.Config.AWSAuthConfig != nil)
fmt.Println()
}
}
// NewClusterRemoveCommand returns a new instance of an `argocd cluster list` command
func NewClusterRemoveCommand(clientOpts *argocdclient.ClientOptions) *cobra.Command {
var command = &cobra.Command{
Use: "rm SERVER",
Short: "Remove cluster credentials",
Example: `argocd cluster rm https://12.34.567.89`,
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 io.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 {
server := c.Server
if len(c.Namespaces) > 0 {
server = fmt.Sprintf("%s (%d namespaces)", c.Server, len(c.Namespaces))
}
_, _ = fmt.Fprintf(w, "%s\t%s\t%s\t%s\t%s\n", 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 io.Close(conn)
clusters, err := clusterIf.List(context.Background(), &clusterpkg.ClusterQuery{})
errors.CheckError(err)
switch output {
case "yaml", "json":
err := PrintResourceList(clusters.Items, output, false)
errors.CheckError(err)
case "server":
printClusterServers(clusters.Items)
case "wide", "":
printClusterTable(clusters.Items)
default:
errors.CheckError(fmt.Errorf("unknown output format: %s", output))
}
},
}
command.Flags().StringVarP(&output, "output", "o", "wide", "Output format. One of: json|yaml|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 SERVER",
Short: fmt.Sprintf("%s cluster rotate-auth SERVER", cliName),
Example: fmt.Sprintf("%s cluster rotate-auth https://12.34.567.89", 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 io.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
}