GO Library to use JUJU commands to bring up a Kubernetes cluster

Pre-reqs

go get gopkg.in/yaml.v2

Usage

Currently can bring up kubernetes cluster in CNCT maas lab or on aws.

You will need to set the instance of Juju with the following fields:

JujuDataPrefix variable

In order to run the juju cli in discrete environments, a different JUJU_DATA path is set per Juju.Name. This path prefix defaults to /tmp and will result in the loss of the juju cli state as /tmp is ephemeral.

Set this variable to a path with persistant storage:

import (
    "github.com/dstorck/gogo"
)

gogo.JujuDataPrefix = "/data"

Juju struct options

• Note - While several fields are optional, you must include either MaasCl and MaasCr or AwsCl and AwsCr

Field Name	Required	Type	Description
Kind	Required	CloudKind	must use one of the const: Maas or Aws
Name	Required	String	JUJU_DATA path and juju clustername for MAAS
Bundle	Required	String	ex "cs:bundle/canonical-kubernetes-193"
p	Optional	Parallel	used for multiple cluster creation
MaasCl	Optional	MaasCloud	maas cloud details
MaasCr	Optional	MaasCredentials	maas credential details
AwsCl	Optional	AwsCloud	aws cloud details
AwsCr	Optional	AwsCredentials	aws credential details

MaasCl Options

Field Name	Required	Type	Description
Endpoint	Required	String	maas url ex-"http://your-ip/MAAS/api/2.0"

MaasCr Options

Field Name	Required	Type	Description
Username	Required	String	maas username
MaasOauth	Required	String	maas api key

AwsCl Options

Field Name	Required	Type	Description
Region	Optional	String	ex "aws/us-west-2"

AwsCr Options

Field Name	Required	Type	Description
Username	Required	String	your aws username
AccessKey	Required	String	aws access key
SecretKey	Required	String	aws secret key

Working commands:

• SetAWSCreds() - sets aws credentials for use with juju
• SetMAASCreds() sets maas credentials for use with juju
• SetMAASCloud() - sets maas cloud information for use with juju
• Spinup() - spins up cluster from specified creds/cloud/bundle (includes setting cloud and credentials)
• ControllerReady() - returns boolean with status of controller availability
• GetStatus() - returns result of running juju status
• ClusterReady() - returns boolean corresponding to readiness of cluster
• GetKubeConfig() - returns the contents of the kubeconfig file
• DestroyCluster() - tears down juju controller and associated cluster
• DestroyComplete() returns boolean corresponding to successful destruction of cluster

Sample file to bring up maas cluster on Samsung's CNCT nuc lab:

package main

import (
	"fmt"

	"github.com/dstorck/gogo"
)

var testRun = gogo.Juju{
	Kind:   gogo.Maas,
	Name:   "test-cluster",
	Bundle: "cs:bundle/kubernetes-core-306",
	MaasCl: myMaasCloud,
	MaasCr: myMaasCreds,
}

var myMaasCloud = gogo.MaasCloud{
	Endpoint: "<your-maas-url>",
}
var myMaasCreds = gogo.MaasCredentials{
	Username:  "<username>",
	MaasOauth: "<maas-api-key>",
}

// current available commands, not meant to be run all at once
func main() {
  testRun.SetMAASCreds()
  testRun.SetMAASCloud()
  testRun.Spinup()
  status, _ := testRun.GetStatus()
	fmt.Println(status)
  testRun.ClusterReady()
  config,_ := testRun.GetKubeConfig()
	fmt.Println(string(config))
  testRun.DestroyCluster()
  testRun.DestroyComplete()
}

Sample file to bring up aws cluster

package main

import (
	"github.com/dstorck/gogo"
)

var testRun = gogo.Juju{
	Kind:   gogo.Aws,
	Name:   "test-cluster",
	Bundle: "cs:bundle/kubernetes-core-306",
	AwsCr:  myAWScreds,
	AwsCl:  myAWScloud,
}

var myAWScreds = gogo.AWSCredentials{
	Username:  "<your-aws-username>",
	AccessKey: "<your-access-key>",
	SecretKey: "<your-secret-key",
}

var myAWScloud = gogo.AWSCloud{
	Region: "aws/us-west-2",
}

// currently available commands, not meant to be run all at once
func main() {
  // testRun.SetAWSCreds()
  // testRun.GetStatus()
  // testRun.Spinup()
  // testRun.ControllerReady()
  // testRun.ClusterReady()
  // testRun.GetKubeConfig()
  // testRun.DestroyCluster()
  // testRun.DestroyComplete()
}