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create_cluster_oke.go
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create_cluster_oke.go
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package cmd
import (
"fmt"
"io"
"io/ioutil"
"os"
"path/filepath"
"regexp"
"strconv"
"strings"
"time"
"github.com/Pallinder/go-randomdata"
"github.com/jenkins-x/jx/pkg/cloud/oke"
"github.com/jenkins-x/jx/pkg/jx/cmd/templates"
"github.com/jenkins-x/jx/pkg/log"
"github.com/jenkins-x/jx/pkg/util"
"github.com/spf13/cobra"
"gopkg.in/AlecAivazis/survey.v1"
"gopkg.in/AlecAivazis/survey.v1/terminal"
)
// CreateClusterOptions the flags for running create cluster
type CreateClusterOKEOptions struct {
CreateClusterOptions
Flags CreateClusterOKEFlags
}
type CreateClusterOKEFlags struct {
ClusterName string
CompartmentId string
VcnId string
KubernetesVersion string
WaitForState string
Endpoint string
PodsCidr string
ServicesCidr string
IsKubernetesDashboardEnabled bool
IsTillerEnabled bool
ServiceLbSubnetIds string
NodePoolName string
NodeImageName string
NodeShape string
SSHPublicKey string
QuantityPerSubnet string
NodePoolSubnetIds string
ClusterMaxWaitSeconds string
ClusterWaitIntervalSeconds string
InitialNodeLabels string
PoolMaxWaitSeconds string
PoolWaitIntervalSeconds string
}
var (
createClusterOKELong = templates.LongDesc(`
This command creates a new Kubernetes cluster on OKE, installs required local dependencies and provisions the
Jenkins X platform
Please add your $HOME/bin to $PATH otherwise jx will have issue invoking OCI CLI command. If you have already
installed OCI CLI, please make sure it is in $PATH.
Oracle Cloud Infrastructure Container Engine for Kubernetes is a fully-managed, scalable, and highly available
service that you can use to deploy your containerized applications to the cloud.
Oracle build the best of what we learn into Kubernetes, the industry-leading open source container orchestrator
which powers Kubernetes Engine.
`)
createClusterOKEExample = templates.Examples(`
jx create cluster oke
`)
)
// 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 NewCmdCreateClusterOKE(f Factory, in terminal.FileReader, out terminal.FileWriter, errOut io.Writer) *cobra.Command {
options := CreateClusterOKEOptions{
CreateClusterOptions: createCreateClusterOptions(f, in, out, errOut, OKE),
}
cmd := &cobra.Command{
Use: "oke",
Short: "Create a new Kubernetes cluster on OKE: Runs on Oracle Cloud",
Long: createClusterOKELong,
Example: createClusterOKEExample,
Run: func(cmd *cobra.Command, args []string) {
options.Cmd = cmd
options.Args = args
err := options.Run()
CheckErr(err)
},
}
options.addCreateClusterFlags(cmd)
options.addCommonFlags(cmd)
cmd.Flags().StringVarP(&options.Flags.ClusterName, "name", "", "", "The name of the cluster. Avoid entering confidential information.")
cmd.Flags().StringVarP(&options.Flags.CompartmentId, "compartmentId", "", "", "The OCID of the compartment in which to create the cluster.")
cmd.Flags().StringVarP(&options.Flags.VcnId, "vcnId", "", "", "The OCID of the virtual cloud network (VCN) in which to create the cluster.")
cmd.Flags().StringVarP(&options.Flags.KubernetesVersion, "kubernetesVersion", "", "", "The version of Kubernetes to install into the cluster masters.")
cmd.Flags().StringVarP(&options.Flags.Endpoint, "endpoint", "", "", "Endpoint for the environment.")
cmd.Flags().StringVarP(&options.Flags.WaitForState, "waitForState", "", "SUCCEEDED", "Specify this option to perform the action and then wait until the work request reaches a certain state.")
cmd.Flags().StringVarP(&options.Flags.PodsCidr, "podsCidr", "", "", "PODS CIDR Block.")
cmd.Flags().StringVarP(&options.Flags.ServicesCidr, "servicesCidr", "", "", "Kubernetes Service CIDR Block.")
cmd.Flags().BoolVarP(&options.Flags.IsKubernetesDashboardEnabled, "isKubernetesDashboardEnabled", "", true, "Is KubernetesDashboard Enabled.")
cmd.Flags().BoolVarP(&options.Flags.IsTillerEnabled, "isTillerEnabled", "", false, "Is Tiller Enabled.")
cmd.Flags().StringVarP(&options.Flags.ServiceLbSubnetIds, "serviceLbSubnetIds", "", "", "Kubernetes Service LB Subnets. Optional but nice to have it as Jenkins X will create ingress controller based on it.")
cmd.Flags().StringVarP(&options.Flags.NodePoolName, "nodePoolName", "", "", "The name of the node pool.")
cmd.Flags().StringVarP(&options.Flags.NodeImageName, "nodeImageName", "", "", "The name of the image running on the nodes in the node pool.")
cmd.Flags().StringVarP(&options.Flags.NodeShape, "nodeShape", "", "", "The name of the node shape of the nodes in the node pool.")
cmd.Flags().StringVarP(&options.Flags.SSHPublicKey, "sshPublicKey", "", "", "The SSH public key to add to each node in the node pool. Optional but nice to have it as user can access work nodes with it.")
cmd.Flags().StringVarP(&options.Flags.QuantityPerSubnet, "quantityPerSubnet", "", "", "The number of nodes to create in each subnet.")
cmd.Flags().StringVarP(&options.Flags.NodePoolSubnetIds, "nodePoolSubnetIds", "", "", "The OCIDs of the subnets in which to place nodes for this node pool.")
cmd.Flags().StringVarP(&options.Flags.ClusterMaxWaitSeconds, "clusterMaxWaitSeconds", "", "", "The maximum time to wait for the work request to reach the state defined by --wait-for-state. Defaults to 1200 seconds.")
cmd.Flags().StringVarP(&options.Flags.ClusterWaitIntervalSeconds, "clusterWaitIntervalSeconds", "", "", "Check every --wait-interval-seconds to see whether the work request to see if it has reached the state defined by --wait-for-state.")
cmd.Flags().StringVarP(&options.Flags.InitialNodeLabels, "initialNodeLabels", "", "", "A list of key/value pairs to add to nodes after they join the Kubernetes cluster.")
cmd.Flags().StringVarP(&options.Flags.PoolMaxWaitSeconds, "poolMaxWaitSeconds", "", "", "The maximum time to wait for the work request to reach the state defined by --wait-for-state. Defaults to 1200 seconds.")
cmd.Flags().StringVarP(&options.Flags.PoolWaitIntervalSeconds, "poolWaitIntervalSeconds", "", "", "Check every --wait-interval-seconds to see whether the work request to see if it has reached the state defined by --wait-for-state.")
return cmd
}
func (o *CreateClusterOKEOptions) Run() error {
err := o.installRequirements(OKE)
if err != nil {
return err
}
err = o.createClusterOKE()
if err != nil {
log.Errorf("error creating cluster %v", err)
return err
}
return nil
}
func (o *CreateClusterOKEOptions) createClusterOKE() error {
surveyOpts := survey.WithStdio(o.In, o.Out, o.Err)
//we assume user has prepared the oci config file under ~/.oci/
imagesArray, kubeVersionsArray, shapesArray, latestKubeVersion, err := oke.GetOptionValues()
if err != nil {
fmt.Println("error")
}
endpoint := o.Flags.Endpoint
if endpoint == "" {
prompt := &survey.Input{
Message: "The corresponding regional endpoint:",
Default: "",
Help: "This is required environment variable",
}
survey.AskOne(prompt, &endpoint, nil, surveyOpts)
}
fmt.Printf("Endpoint is %s\n", endpoint)
os.Setenv("ENDPOINT", endpoint)
if o.Flags.ClusterName == "" {
o.Flags.ClusterName = strings.ToLower(randomdata.SillyName())
log.Infof("No cluster name provided so using a generated one: %s\n", o.Flags.ClusterName)
}
compartmentId := o.Flags.CompartmentId
if compartmentId == "" {
prompt := &survey.Input{
Message: "The OCID of the compartment in which to create the cluster:",
Default: "",
Help: "This is required parameter",
}
survey.AskOne(prompt, &compartmentId, nil, surveyOpts)
}
vcnId := o.Flags.VcnId
if vcnId == "" {
prompt := &survey.Input{
Message: "The OCID of the virtual cloud network (VCN) in which to create the cluster:",
Default: "",
Help: "This is required parameter",
}
survey.AskOne(prompt, &vcnId, nil, surveyOpts)
}
kubernetesVersion := o.Flags.KubernetesVersion
if kubernetesVersion == "" {
prompt := &survey.Select{
Message: "The version of Kubernetes to install into the cluster masters:",
Options: kubeVersionsArray,
Default: latestKubeVersion,
Help: "This is required parameter",
}
survey.AskOne(prompt, &kubernetesVersion, nil, surveyOpts)
}
//Get node pool settings
if o.Flags.NodePoolName == "" {
o.Flags.NodePoolName = strings.ToLower(randomdata.SillyName())
log.Infof("No node pool name provided so using a generated one: " + o.Flags.NodePoolName + "\n")
}
nodeImageName := o.Flags.NodeImageName
if nodeImageName == "" {
prompt := &survey.Select{
Message: "The name of the image running on the nodes in the node pool:",
Options: imagesArray,
Default: "Oracle-Linux-7.4",
Help: "This is required parameter",
PageSize: 10,
}
survey.AskOne(prompt, &nodeImageName, nil, surveyOpts)
}
nodeShape := o.Flags.NodeShape
if nodeShape == "" {
prompt := &survey.Select{
Message: "The name of the node shape of the nodes in the node pool:",
Options: shapesArray,
Default: "VM.Standard1.1",
Help: "This is required parameter",
PageSize: 10,
}
survey.AskOne(prompt, &nodeShape, nil, surveyOpts)
}
nodePoolSubnetIds := o.Flags.NodePoolSubnetIds
if nodePoolSubnetIds == "" {
prompt := &survey.Input{
Message: "The OCIDs of the subnets in which to place nodes for this node pool:",
Default: "",
Help: "This is required parameter",
}
survey.AskOne(prompt, &nodePoolSubnetIds, nil, surveyOpts)
}
nodePoolSubnetIdsArray := strings.Split(nodePoolSubnetIds, ",")
for i := range nodePoolSubnetIdsArray {
nodePoolSubnetIdsArray[i] = "\"" + nodePoolSubnetIdsArray[i] + "\""
}
nodePoolSubnetIdsTemp := "[" + strings.Join(nodePoolSubnetIdsArray, ",") + "]"
err = ioutil.WriteFile("/tmp/oke_pool_config.json", []byte(nodePoolSubnetIdsTemp), 0644)
if err != nil {
fmt.Printf("error write file to /tmp file %v", err)
}
args := []string{"ce", "cluster", "create",
"--name", o.Flags.ClusterName,
"--compartment-id", compartmentId,
"--vcn-id", vcnId,
"--kubernetes-version", kubernetesVersion}
args = append(args, "--wait-for-state", "SUCCEEDED")
//Start processing optional parameters
serviceLbSubnetIds := o.Flags.ServiceLbSubnetIds
if serviceLbSubnetIds == "" {
prompt := &survey.Input{
Message: "The OCIDs of Kubernetes Service LB Subnets:",
Default: "",
Help: "This is optional parameter and nice to have it as Jenkins X will create ingress controller based on it",
}
survey.AskOne(prompt, &serviceLbSubnetIds, nil, surveyOpts)
}
if serviceLbSubnetIds != "" {
serviceLbSubnetIdsArray := strings.Split(serviceLbSubnetIds, ",")
for i := range serviceLbSubnetIdsArray {
serviceLbSubnetIdsArray[i] = "\"" + serviceLbSubnetIdsArray[i] + "\""
}
serviceLbSubnetIdsTemp := "[" + strings.Join(serviceLbSubnetIdsArray, ",") + "]"
err := ioutil.WriteFile("/tmp/oke_cluster_config.json", []byte(serviceLbSubnetIdsTemp), 0644)
if err != nil {
fmt.Printf("error write file to /tmp file %v", err)
}
args = append(args, "--service-lb-subnet-ids", "file:///tmp/oke_cluster_config.json")
}
sshPublicKeyValue := o.Flags.SSHPublicKey
if sshPublicKeyValue == "" {
prompt := &survey.Input{
Message: "The SSH public key to add to each node in the node pool:",
Default: "",
Help: "This is optional parameter and nice to have it as user can access work nodes with it",
}
survey.AskOne(prompt, &sshPublicKeyValue, nil, surveyOpts)
}
isKubernetesDashboardEnabled := o.Flags.IsKubernetesDashboardEnabled
if !isKubernetesDashboardEnabled {
args = append(args, "--dashboard-enabled", "false")
}
isTillerEnabled := o.Flags.IsTillerEnabled
if !isTillerEnabled {
args = append(args, "--tiller-enabled", "false")
}
podsCidr := o.Flags.PodsCidr
if podsCidr != "" {
args = append(args, "--pods-cidr", podsCidr)
}
servicesCidr := o.Flags.ServicesCidr
if servicesCidr != "" {
args = append(args, "--services-cidr", servicesCidr)
}
clusterMaxWaitSeconds := o.Flags.ClusterMaxWaitSeconds
if clusterMaxWaitSeconds != "" {
args = append(args, "--max-wait-seconds", clusterMaxWaitSeconds)
}
clusterWaitIntervalSeconds := o.Flags.ClusterWaitIntervalSeconds
if clusterWaitIntervalSeconds != "" {
args = append(args, "--wait-interval-seconds", clusterWaitIntervalSeconds)
}
fmt.Printf("Args are: %s\n", args)
log.Info("Creating cluster...\n")
output, err := o.getCommandOutput("", "oci", args...)
if err != nil {
return err
}
fmt.Printf("Create cluster output: %s\n", output)
if strings.Contains(output, "identifier") {
subClusterInfo := strings.Split(output, "identifier")
clusterIdRaw := strings.Split(subClusterInfo[1], "}")
clusterId := strings.TrimSpace(strings.Replace(clusterIdRaw[0][4:], "\"", "", -1))
fmt.Printf("Cluster id: %s\n", clusterId)
//setup the kube context
log.Info("Setup kube context ...\n")
var kubeconfigFile = ""
if home := util.HomeDir(); home != "" {
kubeconfigFile = filepath.Join(util.HomeDir(), "kubeconfig")
} else {
kubeconfigFile = filepath.Join("/tmp", "kubeconfig")
}
kubeContextArgs := []string{"ce", "cluster", "create-kubeconfig",
"--cluster-id", clusterId,
"--file", kubeconfigFile}
err = o.runCommandVerbose("oci", kubeContextArgs...)
if err != nil {
return err
}
os.Setenv("KUBECONFIG", kubeconfigFile)
//create node pool
log.Info("Creating node pool ...\n")
poolArgs := "ce node-pool create --name=" + o.Flags.NodePoolName + " --compartment-id=" + compartmentId + " --cluster-id=" + clusterId + " --kubernetes-version=" + kubernetesVersion + " --node-image-name=" + nodeImageName + " --node-shape=" + nodeShape + " --subnet-ids=file:///tmp/oke_pool_config.json" + " --wait-for-state=SUCCEEDED"
quantityPerSubnet := o.Flags.QuantityPerSubnet
quantityPerSubnet = (map[bool]string{true: quantityPerSubnet, false: "1"})[quantityPerSubnet != ""]
log.Info("Will create " + quantityPerSubnet + " node per subnet ...\n")
poolArgs = poolArgs + " --quantity-per-subnet=" + quantityPerSubnet
initialNodeLabels := o.Flags.InitialNodeLabels
if initialNodeLabels != "" {
initialNodeLabelsJson := "[" + initialNodeLabels + "]"
err := ioutil.WriteFile("/tmp/oke_pool_labels_config.json", []byte(initialNodeLabelsJson), 0644)
if err != nil {
fmt.Printf("error write file to /tmp file %v", err)
}
poolArgs = poolArgs + " --initial-node-labels=file:///tmp/oke_pool_labels_config.json"
}
poolMaxWaitSeconds := o.Flags.PoolMaxWaitSeconds
if poolMaxWaitSeconds != "" {
poolArgs = poolArgs + " --max-wait-seconds=" + poolMaxWaitSeconds
}
poolWaitIntervalSeconds := o.Flags.PoolWaitIntervalSeconds
if poolWaitIntervalSeconds != "" {
poolArgs = poolArgs + " --wait-interval-seconds=" + poolWaitIntervalSeconds
}
log.Info("Creating Node Pool...\n")
poolArgsArray := strings.Split(poolArgs, " ")
if sshPublicKeyValue != "" {
sshPubKey := "--ssh-public-key=" + sshPublicKeyValue
poolArgsArray = append(poolArgsArray, sshPubKey)
}
fmt.Printf("Pool creation args are: %s\n", poolArgsArray)
poolCreationOutput, err := o.getCommandOutput("", "oci", poolArgsArray...)
if err != nil {
return err
}
//wait for node pool active
if strings.Contains(poolCreationOutput, "identifier") {
subPoolInfo := strings.Split(poolCreationOutput, "identifier")
poolIdRaw := strings.Split(subPoolInfo[1], "}")
poolId := strings.TrimSpace(strings.Replace(poolIdRaw[0][4:], "\"", "", -1))
fmt.Printf("Node Pool id: %s\n", poolId)
//get node pool status until they are active
nodeQuantity, err := strconv.Atoi(quantityPerSubnet)
if err != nil {
return err
}
err = o.waitForNodeToComeUp(nodeQuantity*len(nodePoolSubnetIdsArray), poolId)
if err != nil {
return fmt.Errorf("Failed to wait for Kubernetes cluster node to be ready: %s\n", err)
}
if isTillerEnabled {
//need to wait for tiller pod is running
fmt.Printf("Wait for tiller pod is running\n")
err = o.waitForTillerComeUp()
if err != nil {
return fmt.Errorf("Failed to wait for Tiller to be ready: %s\n", err)
}
}
err = util.DeleteFile("/tmp/oke_cluster_config.json")
if err != nil {
return err
}
err = util.DeleteFile("/tmp/oke_pool_config.json")
if err != nil {
return err
}
err = util.DeleteFile("/tmp/oke_pool_labels_config.json")
if err != nil {
return err
}
log.Info("Initialising cluster ...\n")
return o.initAndInstall(OKE)
}
}
return nil
}
func (o *CreateClusterOKEOptions) waitForNodeToComeUp(nodeQuantity int, poolId string) error {
attempts := 1000
status := regexp.MustCompile("ACTIVE")
getPoolStatusArgs := []string{"ce", "node-pool", "get", "--node-pool-id", poolId}
for i := 0; ; i++ {
poolStatusOutput, err := o.getCommandOutput("", "oci", getPoolStatusArgs...)
if err != nil {
return err
}
count := len(status.FindAllStringIndex(poolStatusOutput, -1))
fmt.Printf("Now only %d nodes are ready\n", count)
if count == nodeQuantity {
break
}
time.Sleep(time.Second * 5)
if i >= attempts {
return fmt.Errorf("Retry %d times and nodes are still not ready. Please check it manually.", attempts)
}
}
return nil
}
func (o *CreateClusterOKEOptions) waitForTillerComeUp() error {
f := func() error {
tillerStatus := "kubectl get --namespace=kube-system deployment/tiller-deploy | tail -n +2 | awk '{print $5}' | grep 1"
return o.runCommandQuietly("bash", "-c", tillerStatus)
}
return o.retryQuiet(2000, time.Second*10, f)
}