Updating a Kubernetes-CoreOS Master

You can update a Kubernetes-CoreOS master using the CLI tool or REST API, as shown below:

Updating a Kubernetes-CoreOS master via the CLI

Overview

CLI command	update-kubernetes-master
Description	Update the master node of the Kubernetes-CoreOS Cluster.
Command format	update-kubernetes-master -c <CLUSTER_ID> -p <JSON_FILE_PATH> The path to the JSON file that defines the Kubernetes-CoreOS master needs to be defined as the `<JSON_FILE_PATH>` value.

Parameter definition

Short option	Long option	Description	Required	Example value
`-p`	`--resource-path`	Folder path where the `JSON` file that defines the Kubernetes-CoreOS Master is stored.	Yes	<PRIVATE_PAAS_CARTRIDGES>/wso2am/1.9.0/samples /kubernetes-clusters/kuberenetes-master.json
`-c`	`--cluster-id`	ID of the Kubernetes CoreOS Cluster.	Yes	`kubernetes-cluster-1`

Example

Update the master node of the Kubernetes-CoreOS Cluster with the Kubernetes master details defined in the <PRIVATE_PAAS_CARTRIDGES>/wso2am/1.9.0/samples/kubernetes-clusters/kubernetes-master.json file.

update-kubernetes-master -c kubernetes-cluster-1 -p <PRIVATE_PAAS_CARTRIDGES>/wso2am/1.9.0/samples/kubernetes-clusters/kuberenetes-master.json

Sample output

Kubernetes master updated successfully: [kub-master] master

Updating a Kubernetes-CoreOS master via the REST API

Overview

Description	Update the master node in a Kubernetes-CoreOS group.
Resource Path	`/kubernetesClusters/{kubernetesClusterId}/master`
HTTP Method	`PUT`
Request/Response Format	`application/json`
Command format	curl -X PUT -H "Content-Type: application/json" -d @'<JSON_PAYLOAD>' -k -v -u admin:admin https://<PRIVATE_PAAS_HOST>:<PRIVATE_PAAS_HTTPS_PORT>/api/kubernetesClusters/{kubernetesClusterId}/master The path to the JSON file that defines the Kubernetes-CoreOS master needs to be defined as the `<JSON_PAYLOAD>` value. By default, `<USERNAME>:<PASSWORD>` is `admin:admin.` By default, `<PRIVATE_PAAS_HOST>` is `localhost.` However, if you are using a public IP, the respective IP address or domain needs to be specified. By default, `<PRIVATE_PAAS_HTTPS_PORT>` has been set to 9443. However, if the port offset has been incremented by `n`, the default port value needs to be incremented by `n`.

Example

Update the master node of the Kubernetes-CoreOS Cluster with the Kubernetes Master details defined in the <PRIVATE_PAAS_CARTRIDGES>/wso2am/1.9.0/samples/kubernetes-clusters/kubernetes-master.json file.

cd <PRIVATE_PAAS_CARTRIDGES>/wso2am/1.9.0/samples/kubernetes-clusters
curl -X PUT -H "Content-Type: application/json" -d @'kubernetes-cluster-2.json' -k -v -u admin:admin https://localhost:9443/api/kubernetesClusters/kubernetes-cluster-1/master

Sample output

> PUT /api/kubernetesClusters/kubernetes-cluster-1/master HTTP/1.1
> Host: localhost:9443
> Authorization: Basic YWRtaW46YWRtaW4=
> User-Agent: curl/7.43.0
> Accept: */*
> Content-Type: application/json
> Content-Length: 197
> 
< HTTP/1.1 200 OK
< Date: Wed, 30 Sep 2015 09:23:54 GMT
< Content-Type: application/json
< Transfer-Encoding: chunked
< Server: WSO2 Carbon Server
< 
{"status":"success","message":"Kubernetes master updated successfully: [kub-master] master"}

Following are the HTTP status codes you will come across while updating a Kubernetes-CoreOS master:

HTTP status code

200, 404, 500

See the descriptions of the HTTP status codes here.

Location header URL https://<PRIVATE_PAAS_HOST>:<PRIVATE_PAAS_HTTPS_PORT>/api/kubernetesClusters/<KUBERNETES_GROUP_ID>/master/<MASTER_HOST_ID>

Sample Kubernetes-CoreOS master JSON

{
  "hostId": "master",
  "hostname": "master.dev.kubernetes.org",
  "privateIPAddress": "172.17.8.105",
  "publicIPAddress": "172.17.8.109",
  "property": [
     
  ]
}