Kubernetes : Install Helm

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 | +----------------------+ +----------------------+

[1]	Install Helm.

root@ctrl:~#  dnf -y install git root@ctrl:~#  curl -O https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 root@ctrl:~#  bash ./get-helm-3 Downloading https://get.helm.sh/helm-v3.18.6-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:"v3.18.6", GitCommit:"b76a950f6835474e0906b96c9ec68a2eff3a6430", GitTreeState:"clean", GoVersion:"go1.24.6"}

[2]	Basic Usage of Helm.

# search charts by words in Helm Hub debian@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/wordpress-... 1.0.2 1.0.0 A Helm chart for deploying Wordpress+Mariadb st... https://artifacthub.io/packages/helm/bizlinked/... 25.0.0 6.8.1 WordPress is the world's most popular blogging ... ..... ..... # add a repository (example below is bitnami) debian@ctrl:~$  helm repo add bitnami https://charts.bitnami.com/bitnami "bitnami" has been added to your repositories # show repository list debian@ctrl:~$  helm repo list NAME URL bitnami https://charts.bitnami.com/bitnami # search charts by words in repository debian@ctrl:~$  helm search repo bitnami NAME CHART VERSION APP VERSION DESCRIPTION bitnami/airflow 24.2.0 3.0.2 Apache Airflow is a tool to express and execute... bitnami/apache 11.3.19 2.4.63 Apache HTTP Server is an open-source HTTP serve... bitnami/apisix 5.0.4 3.13.0 Apache APISIX is high-performance, real-time AP... bitnami/appsmith 6.0.14 1.79.0 Appsmith is an open source platform for buildin... bitnami/argo-cd 9.0.25 3.0.9 Argo CD is a continuous delivery tool for Kuber... bitnami/argo-workflows 12.0.6 3.6.10 Argo Workflows is meant to orchestrate Kubernet... bitnami/aspnet-core 7.0.10 9.0.6 ASP.NET Core is an open-source framework for we... bitnami/cadvisor 0.1.10 0.53.0 cAdvisor (Container Advisor) is an open-source ... bitnami/cassandra 12.3.8 5.0.4 Apache Cassandra is an open source distributed . ..... ..... # display description of a chart # helm show [all|chart|readme|values] [chart name] debian@ctrl:~$  helm show chart bitnami/haproxy annotations: category: Infrastructure images: | - name: haproxy image: docker.io/bitnami/haproxy:3.2.4-debian-12-r0 licenses: Apache-2.0 tanzuCategory: clusterUtility apiVersion: v2 appVersion: 3.2.4 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://dyltqmyl993wv.cloudfront.net/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: 2.2.34 # deploy application by specified chart # helm install [any name] [chart name] debian@ctrl:~$  helm install haproxy bitnami/haproxy NAME: haproxy LAST DEPLOYED: Fri Aug 22 19:48:07 2025 NAMESPACE: default STATUS: deployed REVISION: 1 TEST SUITE: None NOTES: CHART NAME: haproxy CHART VERSION: 2.2.34 APP VERSION: 3.2.4 WARNING: Since August 28th, 2025, only a limited subset of images/charts are available for free. Subscribe to Bitnami Secure Images to receive continued support and security updates. More info at https://bitnami.com and https://github.com/bitnami/containers/issues/83267 ** 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 $3}' 3. Configure DNS records corresponding to Kubernetes ingress resources to point to the load balancer IP/hostname found in step 3 WARNING: There are "resources" sections in the chart not set. Using "resourcesPreset" is not recommended for production. For production installations, please set the following values according to your workload needs: - resources +info https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/ # display deployed application list debian@ctrl:~$  helm list NAME NAMESPACE REVISION UPDATED STATUS CHART APP VERSION haproxy default 1 2025-08-22 19:48:07.282611445 +0900 JST deployed haproxy-2.2.34 3.2.4 # display the status of deployed application debian@ctrl:~$  helm status haproxy NAME: haproxy LAST DEPLOYED: Fri Aug 22 19:48:07 2025 NAMESPACE: default STATUS: deployed REVISION: 1 TEST SUITE: None NOTES: CHART NAME: haproxy CHART VERSION: 2.2.34 APP VERSION: 3.2.4 ..... ..... debian@ctrl:~$  kubectl get pods NAME READY STATUS RESTARTS AGE haproxy-5b789c94f6-bnhxh 1/1 Running 0 2m10s # uninstall a deployed application debian@ctrl:~$  helm uninstall haproxy release "haproxy" uninstalled