Kubernetes : Install Helm2025/01/23 |
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Install Helm which helps to manage Kubernetes applications. In this example, a Kubernetes cluster is configured using four nodes as follows.
+----------------------+ +----------------------+
| [ ctrl.srv.world ] | | [ dlp.srv.world ] |
| Manager Node | | Control Plane |
+-----------+----------+ +-----------+----------+
eth0|10.0.0.25 eth0|10.0.0.30
| |
------------+--------------------------+-----------
| |
eth0|10.0.0.51 eth0|10.0.0.52
+-----------+----------+ +-----------+----------+
| [ node01.srv.world ] | | [ node02.srv.world ] |
| Worker Node#1 | | Worker Node#2 |
+----------------------+ +----------------------+
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| [1] | Install Helm. |
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[root@ctrl ~]#
dnf -y install git
[root@ctrl ~]#
[root@ctrl ~]# curl -O https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3
bash ./get-helm-3 Downloading https://get.helm.sh/helm-v3.17.0-linux-amd64.tar.gz Verifying checksum... Done. Preparing to install helm into /usr/local/bin helm installed into /usr/local/bin/helm[root@ctrl ~]# helm version version.BuildInfo{Version:"v3.17.0", GitCommit:"301108edc7ac2a8ba79e4ebf5701b0b6ce6a31e4", GitTreeState:"clean", GoVersion:"go1.23.4"} |
| [2] | Basic Usage of Helm. |
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# search charts by words in Helm Hub [cent@ctrl ~]$ helm search hub wordpress URL CHART VERSION APP VERSION DESCRIPTION https://artifacthub.io/packages/helm/wordpress-... 1.0.2 1.0.0 A Helm chart for deploying Wordpress+Mariadb st... https://artifacthub.io/packages/helm/kube-wordp... 0.1.0 1.1 this is my wordpress package https://artifacthub.io/packages/helm/bitnami/wo... 24.1.7 6.7.1 WordPress is the world's most popular blogging ... ..... ..... # add a repository (example below is bitnami) [cent@ctrl ~]$ helm repo add bitnami https://charts.bitnami.com/bitnami "bitnami" has been added to your repositories # show repository list [cent@ctrl ~]$ helm repo list NAME URL bitnami https://charts.bitnami.com/bitnami # search charts by words in repository [cent@ctrl ~]$ helm search repo bitnami NAME CHART VERSION APP VERSION DESCRIPTION bitnami/airflow 22.4.7 2.10.4 Apache Airflow is a tool to express and execute... bitnami/apache 11.3.1 2.4.62 Apache HTTP Server is an open-source HTTP serve... bitnami/apisix 4.0.0 3.11.0 Apache APISIX is high-performance, real-time AP... bitnami/appsmith 5.1.7 1.57.0 Appsmith is an open source platform for buildin... bitnami/argo-cd 7.1.4 2.13.3 Argo CD is a continuous delivery tool for Kuber... bitnami/argo-workflows 11.1.2 3.6.2 Argo Workflows is meant to orchestrate Kubernet... bitnami/aspnet-core 6.3.2 8.0.12 ASP.NET Core is an open-source framework for we... bitnami/cassandra 12.1.1 5.0.2 Apache Cassandra is an open source distributed ... bitnami/cert-manager 1.4.3 1.16.3 cert-manager is a Kubernetes add-on to automate... ..... ..... # display description of a chart # helm show [all|chart|readme|values] [chart name] [cent@ctrl ~]$ helm show chart bitnami/haproxy
annotations:
category: Infrastructure
images: |
- name: haproxy
image: docker.io/bitnami/haproxy:3.1.2-debian-12-r1
licenses: Apache-2.0
apiVersion: v2
appVersion: 3.1.2
dependencies:
- name: common
repository: oci://registry-1.docker.io/bitnamicharts
tags:
- bitnami-common
version: 2.x.x
description: HAProxy is a TCP proxy and a HTTP reverse proxy. It supports SSL termination
and offloading, TCP and HTTP normalization, traffic regulation, caching and protection
against DDoS attacks.
home: https://bitnami.com
icon: https://bitnami.com/assets/stacks/haproxy/img/haproxy-stack-220x234.png
keywords:
- haproxy
- proxy
- infrastructure
maintainers:
- name: Broadcom, Inc. All Rights Reserved.
url: https://github.com/bitnami/charts
name: haproxy
sources:
- https://github.com/bitnami/charts/tree/main/bitnami/haproxy
version: 2.2.4
# deploy application by specified chart # helm install [any name] [chart name] [cent@ctrl ~]$ helm install haproxy bitnami/haproxy
NAME: haproxy
LAST DEPLOYED: Thu Jan 23 15:54:33 2025
NAMESPACE: default
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:
CHART NAME: haproxy
CHART VERSION: 2.2.4
APP VERSION: 3.1.2
Did you know there are enterprise versions of the Bitnami catalog? For enhanced secure software supply chain features, unlimited pulls from Docker, LTS support, or application customization, see Bitnami Premium or Tanzu Application Catalog. See https://www.arrow.com/globalecs/na/vendors/bitnami for more information.
** Please be patient while the chart is being deployed **
1. HAproxy has been started. You can find out the port numbers being used by HAProxy by running:
$ kubectl describe svc haproxy --namespace default
2. Get HAProxy's load balancer IP/hostname:
NOTE: It may take a few minutes for this to become available.
You can watch the status by running:
$ kubectl get svc haproxy --namespace default -w
Once 'EXTERNAL-IP' is no longer '<pending>':
$ kubectl describe svc haproxy --namespace default | grep Ingress | awk '{print $3}'
3. Configure DNS records corresponding to Kubernetes ingress resources to point to the load balancer IP/hostname found in step 3
WARNING: There are "resources" sections in the chart not set. Using "resourcesPreset" is not recommended for production. For production installations, please set the following values according to your workload needs:
- resources
+info https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/
# display deployed application list [cent@ctrl ~]$ helm list NAME NAMESPACE REVISION UPDATED STATUS CHART APP VERSION haproxy default 1 2025-01-23 15:54:33.563492193 +0900 JST deployed haproxy-2.2.4 3.1.2 # display the status of deployed application [cent@ctrl ~]$ helm status haproxy NAME: haproxy LAST DEPLOYED: Thu Jan 23 15:54:33 2025 NAMESPACE: default STATUS: deployed REVISION: 1 TEST SUITE: None NOTES: CHART NAME: haproxy CHART VERSION: 2.2.4 APP VERSION: 3.1.2 ..... .....[cent@ctrl ~]$ kubectl get pods NAME READY STATUS RESTARTS AGE haproxy-59b498ddc5-kd642 1/1 Running 0 2m3s # uninstall a deployed application [cent@ctrl ~]$ helm uninstall haproxy release "haproxy" uninstalled |
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