Kubernetes : Install Helm2022/11/03 |
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Install Helm which helps to manage Kubernetes applications.
This example is based on the environment like follows.
-----------+---------------------------+--------------------------+------------
| | |
eth0|10.0.0.25 eth0|10.0.0.71 eth0|10.0.0.72
+----------+-----------+ +-----------+-----------+ +-----------+-----------+
| [ ctrl.srv.world ] | | [snode01.srv.world] | | [snode02.srv.world] |
| Control Plane | | Worker Node | | Worker Node |
+----------------------+ +-----------------------+ +-----------------------+
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| [1] | Install Helm. |
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root@ctrl:~#
curl -O https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3
root@ctrl:~#
root@ctrl:~# bash ./get-helm-3 Downloading https://get.helm.sh/helm-v3.10.1-linux-amd64.tar.gz Verifying checksum... Done. Preparing to install helm into /usr/local/bin helm installed into /usr/local/bin/helm helm version version.BuildInfo{Version:"v3.10.1", GitCommit:"9f88ccb6aee40b9a0535fcc7efea6055e1ef72c9", GitTreeState:"clean", GoVersion:"go1.18.7"} |
| [2] | Basic Usage of Helm. |
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# search charts by words in Helm Hub root@ctrl:~# helm search hub wordpress URL CHART VERSION APP VERSION DESCRIPTION https://artifacthub.io/packages/helm/kube-wordp... 0.1.0 1.1 this is my wordpress package https://artifacthub.io/packages/helm/shubham-wo... 0.1.0 1.16.0 A Helm chart for Kubernetes https://artifacthub.io/packages/helm/bitnami/wo... 15.2.10 6.1.0 WordPress is the world's most popular blogging ... ..... ..... # add repository # example below is the official Helm Stable repository root@ctrl:~# helm repo add stable https://charts.helm.sh/stable "stable" has been added to your repositories root@ctrl:~# helm repo add bitnami https://charts.bitnami.com/bitnami "bitnami" has been added to your repositories # display added repositories root@ctrl:~# helm repo list NAME URL stable https://charts.helm.sh/stable bitnami https://charts.bitnami.com/bitnami # search charts by words in repository root@ctrl:~# helm search repo stable NAME CHART VERSION APP VERSION DESCRIPTION stable/acs-engine-autoscaler 2.2.2 2.1.1 DEPRECATED Scales worker nodes within agent pools stable/aerospike 0.3.5 v4.5.0.5 DEPRECATED A Helm chart for Aerospike in Kubern... stable/airflow 7.13.3 1.10.12 DEPRECATED - please use: https://github.com/air... stable/ambassador 5.3.2 0.86.1 DEPRECATED A Helm chart for Datawire Ambassador stable/anchore-engine 1.7.0 0.7.3 Anchore container analysis and policy evaluatio... stable/apm-server 2.1.7 7.0.0 DEPRECATED The server receives data from the El... ..... ..... # display description of a chart # helm show [all|chart|readme|values] [chart name] root@ctrl:~# helm show chart bitnami/wordpress annotations: category: CMS apiVersion: v2 appVersion: 6.1.0 dependencies: - condition: memcached.enabled name: memcached repository: https://charts.bitnami.com/bitnami version: 6.x.x - condition: mariadb.enabled name: mariadb repository: https://charts.bitnami.com/bitnami version: 11.x.x - name: common repository: https://charts.bitnami.com/bitnami tags: - bitnami-common version: 2.x.x description: WordPress is the world's most popular blogging and content management platform. Powerful yet simple, everyone from students to global corporations use it to build beautiful, functional websites. home: https://github.com/bitnami/charts/tree/main/bitnami/wordpress icon: https://bitnami.com/assets/stacks/wordpress/img/wordpress-stack-220x234.png keywords: - application - blog - cms - http - php - web - wordpress maintainers: - name: Bitnami url: https://github.com/bitnami/charts name: wordpress sources: - https://github.com/bitnami/containers/tree/main/bitnami/wordpress - https://wordpress.org/ version: 15.2.10 # deploy application by specified chart # helm install [any name] [chart name] root@ctrl:~# helm install wordpress bitnami/wordpress
NAME: wordpress
LAST DEPLOYED: Thu Nov 3 05:27:16 2022
NAMESPACE: default
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:
CHART NAME: wordpress
CHART VERSION: 15.2.10
APP VERSION: 6.1.0
** Please be patient while the chart is being deployed **
Your WordPress site can be accessed through the following DNS name from within your cluster:
wordpress.default.svc.cluster.local (port 80)
To access your WordPress site from outside the cluster follow the steps below:
1. Get the WordPress URL by running these commands:
NOTE: It may take a few minutes for the LoadBalancer IP to be available.
Watch the status with: 'kubectl get svc --namespace default -w wordpress'
export SERVICE_IP=$(kubectl get svc --namespace default wordpress --include "{{ range (index .status.loadBalancer.ingress 0) }}{{ . }}{{ end }}")
echo "WordPress URL: http://$SERVICE_IP/"
echo "WordPress Admin URL: http://$SERVICE_IP/admin"
2. Open a browser and access WordPress using the obtained URL.
3. Login with the following credentials below to see your blog:
echo Username: user
echo Password: $(kubectl get secret --namespace default wordpress -o jsonpath="{.data.wordpress-password}" | base64 -d)
# display deployed applications root@ctrl:~# helm list NAME NAMESPACE REVISION UPDATED STATUS CHART APP VERSION wordpress default 1 2022-11-03 05:27:16.505435499 +0000 UTC deployed wordpress-15.2.10 6.1.0 # display status of a deployed apprication root@ctrl:~# helm status wordpress NAME: wordpress LAST DEPLOYED: Thu Nov 3 05:27:16 2022 NAMESPACE: default STATUS: deployed REVISION: 1 TEST SUITE: None NOTES: CHART NAME: wordpress CHART VERSION: 15.2.10 APP VERSION: 6.1.0 ..... ..... # uninstall a deployed application root@ctrl:~# helm uninstall wordpress release "registry" uninstalled |
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