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update_cluster_gke_terraform.go
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update_cluster_gke_terraform.go
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package cmd
import (
"io"
"fmt"
os_user "os/user"
"os"
"path/filepath"
"github.com/jenkins-x/jx/pkg/cloud/gke"
"github.com/jenkins-x/jx/pkg/jx/cmd/templates"
"github.com/jenkins-x/jx/pkg/log"
"github.com/spf13/cobra"
"gopkg.in/AlecAivazis/survey.v1"
)
// CreateClusterOptions the flags for running create cluster
type UpdateClusterGKETerraformOptions struct {
UpdateClusterOptions
Flags UpdateClusterGKETerraformFlags
}
type UpdateClusterGKETerraformFlags struct {
ClusterName string
SkipLogin bool
ServiceAccount string
}
var (
updateClusterGKETerraformLong = templates.LongDesc(`
Command re-applies the terraform plan in ~/.jx/clusters/<cluster>/terraform against the specified cluster
`)
updateClusterGKETerraformExample = templates.Examples(`
jx update cluster gke terraform
`)
)
// NewCmdGet creates a command object for the generic "init" action, which
// installs the dependencies required to run the jenkins-x platform on a kubernetes cluster.
func NewCmdUpdateClusterGKETerraform(f Factory, out io.Writer, errOut io.Writer) *cobra.Command {
options := createUpdateClusterGKETerraformOptions(f, out, errOut, GKE)
cmd := &cobra.Command{
Use: "terraform",
Short: "Updates an existing kubernetes cluster on GKE using Terraform: Runs on Google Cloud",
Long: updateClusterGKETerraformLong,
Example: updateClusterGKETerraformExample,
Run: func(cmd *cobra.Command, args []string) {
options.Cmd = cmd
options.Args = args
err := options.Run()
CheckErr(err)
},
}
options.addCommonFlags(cmd)
cmd.Flags().StringVarP(&options.Flags.ClusterName, optionClusterName, "n", "", "The name of this cluster")
cmd.Flags().BoolVarP(&options.Flags.SkipLogin, "skip-login", "", false, "Skip Google auth if already logged in via gloud auth")
cmd.Flags().StringVarP(&options.ServiceAccount, "service-account", "", "", "Use a service account to login to GCE")
return cmd
}
func createUpdateClusterGKETerraformOptions(f Factory, out io.Writer, errOut io.Writer, cloudProvider string) UpdateClusterGKETerraformOptions {
commonOptions := CommonOptions{
Factory: f,
Out: out,
Err: errOut,
}
options := UpdateClusterGKETerraformOptions{
UpdateClusterOptions: UpdateClusterOptions{
UpdateOptions: UpdateOptions{
CommonOptions: commonOptions,
},
Provider: cloudProvider,
},
}
return options
}
func (o *UpdateClusterGKETerraformOptions) Run() error {
err := o.installRequirements(GKE, "terraform", o.InstallOptions.InitOptions.HelmBinary())
if err != nil {
return err
}
err = o.updateClusterGKETerraform()
if err != nil {
log.Errorf("error creating cluster %v", err)
return err
}
return nil
}
func (o *UpdateClusterGKETerraformOptions) updateClusterGKETerraform() error {
if !o.BatchMode {
confirm := false
prompt := &survey.Confirm{
Message: "Updating a GKE cluster with terraform is an experimental feature in jx. Would you like to continue?",
}
survey.AskOne(prompt, &confirm, nil)
if !confirm {
// exit at this point
return nil
}
}
err := gke.Login(o.ServiceAccount, o.Flags.SkipLogin)
if err != nil {
return err
}
if o.Flags.ClusterName == "" {
log.Info("No cluster name provided\n")
return nil
}
serviceAccount := fmt.Sprintf("jx-%s", o.Flags.ClusterName)
user, err := os_user.Current()
if err != nil {
return err
}
jxHome := filepath.Join(user.HomeDir, ".jx")
clustersHome := filepath.Join(jxHome, "clusters")
clusterHome := filepath.Join(clustersHome, o.Flags.ClusterName)
os.MkdirAll(clusterHome, os.ModePerm)
var keyPath string
if o.ServiceAccount == "" {
keyPath = filepath.Join(clusterHome, fmt.Sprintf("%s.key.json", serviceAccount))
} else {
keyPath = o.ServiceAccount
}
if _, err := os.Stat(keyPath); os.IsNotExist(err) {
log.Infof("Unable to find service account key %s\n", keyPath)
return nil
}
terraformDir := filepath.Join(clusterHome, "terraform")
if _, err := os.Stat(terraformDir); os.IsNotExist(err) {
log.Infof("Unable to find terraform plan dir %s\n", terraformDir)
return nil
}
// create .tfvars file in .jx folder
terraformVars := filepath.Join(terraformDir, "terraform.tfvars")
args := []string{"init", terraformDir}
err = o.runCommand("terraform", args...)
if err != nil {
return err
}
terraformState := filepath.Join(terraformDir, "terraform.tfstate")
args = []string{"plan",
fmt.Sprintf("-state=%s", terraformState),
fmt.Sprintf("-var-file=%s", terraformVars),
terraformDir}
err = o.runCommandVerbose("terraform", args...)
if err != nil {
return err
}
if !o.BatchMode {
confirm := false
prompt := &survey.Confirm{
Message: "Would you like to apply this plan",
}
survey.AskOne(prompt, &confirm, nil)
if !confirm {
// exit at this point
return nil
}
}
log.Info("Applying plan...\n")
args = []string{"apply",
"-auto-approve",
fmt.Sprintf("-state=%s", terraformState),
fmt.Sprintf("-var-file=%s", terraformVars),
terraformDir}
err = o.runCommandVerbose("terraform", args...)
if err != nil {
return err
}
return nil
}