open-consul/website/content/docs/k8s/operations/uninstall.mdx

116 lines
5.3 KiB
Plaintext

---
layout: docs
page_title: Uninstall Consul on Kubernetes
description: >-
You can use the Consul-K8s CLI tool to remove all or part of a Consul installation on Kubernetes. You can also use Helm and then manually remove resources that Helm does not delete.
---
# Uninstall Consul on Kubernetes
You can uninstall Consul using Helm commands or the Consul K8s CLI.
## Consul K8s CLI
Issue the `consul-k8s uninstall` command to remove Consul on Kubernetes. You can specify the installation name, namespace, and data retention behavior using the applicable options. By default, the uninstall preserves the secrets and PVCs that are provisioned by Consul on Kubernetes.
```shell-session
$ consul-k8s uninstall <OPTIONS>
```
In the following example, Consul will be uninstalled and the data removed without prompting you to verify the operations:
```shell-session
$ consul-k8s uninstall -auto-approve=true -wipe-data=true
```
Refer to the [Consul K8s CLI reference](/docs/k8s/k8s-cli#uninstall) topic for details.
## Helm commands
Run the `helm uninstall` **and** manually remove resources that Helm does not delete.
1. Although the Helm chart automates the deletion of CRDs upon uninstall, sometimes the finalizers tied to those CRDs may not complete because the deletion of the CRDs rely on the Consul K8s controller running. Ensure that previously created CRDs for Consul on Kubernetes are deleted, so subsequent installs of Consul on Kubernetes on the same Kubernetes cluster do not get blocked.
```shell-session
$ kubectl delete crd --selector app=consul
```
1. (Optional) If Consul is installed in a dedicated namespace, set the kubeConfig context to the `consul` namespace. Otherwise, subsequent commands will need to include `--namespace consul`.
```shell-session
$ kubectl config set-context --current --namespace=consul
```
1. Run the `helm uninstall <release-name>` command and specify the release name you've installed Consul with, e.g.,:
```shell-session
$ helm uninstall consul
release "consul" uninstalled
```
1. After deleting the Helm release, you need to delete the `PersistentVolumeClaim`'s
for the persistent volumes that store Consul's data. A [bug](https://github.com/helm/helm/issues/5156) in Helm prevents PVCs from being deleted. Issue the following commands:
```shell-session
$ kubectl get pvc --selector="chart=consul-helm"
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
data-default-hashicorp-consul-server-0 Bound pvc-32cb296b-1213-11ea-b6f0-42010a8001db 10Gi RWO standard 17m
data-default-hashicorp-consul-server-1 Bound pvc-32d79919-1213-11ea-b6f0-42010a8001db 10Gi RWO standard 17m
data-default-hashicorp-consul-server-2 Bound pvc-331581ea-1213-11ea-b6f0-42010a8001db 10Gi RWO standard 17m
$ kubectl delete pvc --selector="chart=consul-helm"
persistentvolumeclaim "data-default-hashicorp-consul-server-0" deleted
persistentvolumeclaim "data-default-hashicorp-consul-server-1" deleted
persistentvolumeclaim "data-default-hashicorp-consul-server-2" deleted
```
~> **NOTE:** This will delete **all** data stored in Consul and it can't be
recovered unless you've taken other backups.
1. If installing with ACLs enabled, you will need to then delete the ACL secrets:
```shell-session
$ kubectl get secrets --field-selector="type=Opaque" | grep consul
consul-acl-replication-acl-token Opaque 1 41m
consul-bootstrap-acl-token Opaque 1 41m
consul-client-acl-token Opaque 1 41m
consul-connect-inject-acl-token Opaque 1 37m
consul-controller-acl-token Opaque 1 37m
consul-federation Opaque 4 41m
consul-mesh-gateway-acl-token Opaque 1 41m
```
1. Ensure that the secrets you're about to delete are all created by Consul and not
created by another user with the word `consul`.
```shell-session
$ kubectl get secrets --field-selector="type=Opaque" | grep consul | awk '{print $1}' | xargs kubectl delete secret
secret "consul-acl-replication-acl-token" deleted
secret "consul-bootstrap-acl-token" deleted
secret "consul-client-acl-token" deleted
secret "consul-connect-inject-acl-token" deleted
secret "consul-controller-acl-token" deleted
secret "consul-federation" deleted
secret "consul-mesh-gateway-acl-token" deleted
secret "consul-gossip-encryption-key" deleted
```
1. If installing with `tls.enabled` then, run the following commands to delete the `ServiceAccount` left behind:
```shell-session
$ kubectl get serviceaccount consul-tls-init
NAME SECRETS AGE
consul-tls-init 1 47m
```
```shell-session
$ kubectl delete serviceaccount consul-tls-init
serviceaccount "consul-tls-init" deleted
```
1. (Optional) Delete the namespace (i.e. `consul` in the following example) that you have dedicated for installing Consul on Kubernetes.
```shell-session
$ kubectl delete ns consul
```