Kubectl Openstack Plugin

based on k8s.io/sample-cli-plugin

Installation

Prerequisites

• Afaik kubectl plugins without plugin.yaml only work with kubectl >=1.12

Installation via go get

Just execute the following and make sure $GOPATH/bin is in your $PATH:

GO111MODULE=on go get github.com/sbueringer/kubectl-openstack-plugin/cmd/kubectl-openstack@v0.0.15

Note: this currently only works without GO111MODULE=on because a replace directive for gophercloud is used. (see also: golang/go#30354)

Installation via download

Download the binary from Releases and place it in a directory in your PATH.

Configuration

To access OpenStack via this plugin the OpenStack credentials must be configured either via env variables or via clouds.yaml config file.

Configuration via Environment Variables

The plugin can be configured by setting the following env variables:

• OS_USERNAME
• OS_PASSWORD
• OS_PROJECT_NAME or OS_TENANT_NAME
• OS_AUTH_URL

Configuration via config file

The location of the config file must be configured via OPENSTACK_CONFIG_FILE env var. An example clouds.yaml:

clouds:
  i01p015:
    auth:
      auth_url: http://192.168.122.10:35357/
      project_name: i01p015
      username: demo
      password: password

Note: The cloud/project_name is automatically discovered from the current kube context. E.g. a kube context named i01p015-cluster-admin leads to a cloud/project_name of i01p015. Note: The clouds.yaml file can be created from .rc files via the import-config sub command.

Usage

The kubectl OpenStack plugin currently has three commands, which are shown here.

kubectl openstack server

The server command combines information about Kubernetes Nodes with OpenStack Server.

$ kubectl openstack server
NODE_NAME               STATUS  KUBELET_VERSION  KUBEPROXY_VERSION  RUNTIME_VERSION  SERVER_ID                             STATE   CPU  RAM  IP
i01p015-kube-master01  Ready   v1.11.0           v1.11.0            docker://18.3.1  c11231ab-4315-4a77-b5fc-22f2a668d414  ACTIVE  2    15G  10.12.4.12
i01p015-kube-node01    Ready   v1.11.0           v1.11.0            docker://18.3.1  04acf401-dcf4-4e7c-8796-69662768067a  ACTIVE  2     8G  10.12.4.17
i01p015-kube-node02    Ready   v1.11.0           v1.11.0            docker://18.3.1  cf03414f-f692-4766-a797-16f01b154d6e  ACTIVE  2     8G  10.12.4.7
i01p015-kube-node03    Ready   v1.11.0           v1.11.0            docker://18.3.1  fca70123-2db0-430a-a84e-5010cc1f0f71  ACTIVE  2     8G  10.12.4.15

kubectl openstack volumes

The volumes command combines information about Kubernetes Persistent Volumes & Nodes with OpenStack Volumes.

$ kubectl openstack volumes
CLAIM                                 PV_NAME                                   CINDER_ID                             SERVERS                 STATUS
default/cache                         pvc-15eb6f71-943a-11e8-9844-fa163e81bcc3  3c1e3f40-09ad-4a2a-b77e-8abc53f9d8d7  i01p015-kube-node02     in-use
monitoring/data-prometheus-0          pvc-02432937-93ed-11e8-9844-fa163e81bcc3  e47df157-e654-4491-a25d-ad42475d4822  i01p015-kube-node04     in-use
logging/data-elastic-0                pvc-c627c780-93ec-11e8-9844-fa163e81bcc3  69237173-6413-450b-9007-ec3bce8b3e39  i01p015-kube-node03     in-use

kubectl openstack lb

The lb command combines information about Kubernetes Services with OpenStack LoadBalancer resources.

$ kubectl openstack lb
NAME                  FLOATING_IPS  VIP_ADDRESS  PORTS                                            SERVICES
external              59.1.0.15     10.12.4.6    8080 => [10.12.4.17 10.12.4.7 10.12.4.15]:30080  external/traefik
internal              59.1.0.14     10.12.4.5    443 => [10.12.4.17 10.12.4.7 10.12.4.15]:30443   internal/traefik

Roadmap

• enable output via go template like json path (from both openstack & kube object)
• unit tests