From 53c46e476e8e811cd97dbacf6a1b6b4a9ac89398 Mon Sep 17 00:00:00 2001
From: Sujeet Agrahari <sujeet.rgcsm@gmail.com>
Date: Tue, 20 Feb 2024 14:55:25 +0530
Subject: [PATCH] Add step wise guidelines

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 step-wise-guideline.md | 149 +++++++++++++++++++++++++++++++++++++++++
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 create mode 100644 step-wise-guideline.md

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+# Introduction
+
+We will be deploying the `quick-links` service in a local kubernetes cluster along with `PostgreSQL` and `Redis` cluster.
+
+Also, we will setup `Kong` API gateway and we will use `Argocd` for continuous deployment.
+
+We have two main directories to handles all of the deployment/setup tasks
+
+- deploy: It has the deployment related files: `helm` chart and argocd `application` file
+- kubernetes: It will have `kong` related setup files and `kubernetes` dashboard setup files
+
+## Prerequisites
+
+1. Make sure you have latest docker desktop version installed
+2. Enable kubernetes
+3. Install helm: `brew install helm`
+4. Install `kubectl`: `brew install kubernetes-cli`
+
+## Setup PostgreSQL cluster
+
+```sh
+# step 1
+helm repo add bitnami https://charts.bitnami.com/bitnami
+
+# step 2
+helm install postgres bitnami/postgresql-ha \
+--set global.postgresql.username="postgres" \
+--set global.postgresql.password="password" \
+--set global.postgresql.database="quicklink" \
+--set global.postgresql.repmgrUsername="repmgr" \
+--set global.postgresql.repmgrPassword="password" \
+--set global.postgresql.repmgrDatabase="repmgr" \
+--set global.pgpool.adminUsername="admin" \
+--set global.pgpool.adminPassword="password" \
+--set postgresqlImage.debug=true
+```
+
+Once installed,
+
+PostgreSQL can be accessed through Pgpool via port 5432 on the following DNS name from within your cluster:
+
+```sh
+postgres-postgresql-ha-pgpool.default.svc.cluster.local
+```
+
+To get the password for the `postgres` user run:
+
+```sh
+kubectl get secret --namespace default postgres-postgresql-ha-postgresql -o jsonpath="{.data.password}" | base64 -d | pbcopy
+```
+
+To connect to your database and test from outside the cluster execute the following commands:
+
+```sh
+kubectl port-forward --namespace default svc/postgres-postgresql-ha-pgpool 5433:5432
+
+# If you want to make accessible through th process, you can run in background process:
+
+kubectl port-forward --namespace default svc/postgres-postgresql-ha-pgpool 5433:5432 &
+```
+
+## Setup Redis cluster
+
+```sh
+# Install redis - single mast and multiple slaves
+helm install redis bitnami/redis
+
+
+
+
+# Redis&reg; can be accessed on the following DNS names from within your cluster:
+
+# redis-master.default.svc.cluster.local for read/write operations (port 6379)
+# redis-replicas.default.svc.cluster.local for read-only operations (port 6379)
+
+# To get your password run:
+kubectl get secret --namespace default redis -o jsonpath="{.data.redis-password}" | base64 -d | pbcopy
+
+# To connect to your database from outside the cluster execute the following commands:
+
+kubectl port-forward --namespace default svc/redis-master 6379:6379 &
+```
+
+## Setup Kubernetes dashboard
+
+```sh
+helm repo add kubernetes-dashboard https://kubernetes.github.io/dashboard/
+
+helm install kubernetes-dashboard kubernetes-dashboard/kubernetes-dashboard --create-namespace --namespace kubernetes-dashboard
+
+# To access the dashboard run the following command:
+  kubectl apply -f kubernetes/k8s-dashboard/k8s-dashboard.service-account.yaml
+kubectl apply -f kubernetes/k8s-dashboard/k8s-dashboard.role-binding.yaml
+
+
+# Get the token
+kubectl create token dashboard-sa | pbcopy
+
+kubectl proxy
+# http://localhost:8001/api/v1/namespaces/kubernetes-dashboard/services/https:kubernetes-dashboard:https/proxy/#/login
+
+```
+
+## Setup Kong
+
+```sh
+# default namesapce
+helm install kong kong/kong  --set admin.useTLS=false,admin.enabled=true,admin.http.enabled=true,env.admin_gui_path=/kong-manager,env.admin_gui_url=http://localhost/kong-manager,env.admin_gui_api_url=http://localhost/kong-admin
+```
+
+## Setup Argocd
+
+```sh
+kubectl create namespace argocd
+
+kubectl apply -n argocd -f https://raw.githubusercontent.com/argoproj/argo-cd/stable/manifests/install.yaml
+
+
+# to serve on http you need add toplevel
+# Go to kubernetes dashboard and update the argocd-cm config map
+# data:
+#    server.insecure: true
+#    server.rootpath: /argocd -> it is needed to run behind proxy
+
+kubectl get secrets -n argocd argocd-initial-admin-secret -o yaml
+
+# Decode the password field got from above command
+echo NkZoc3E0RW45OTZDRDlJdg== | base64 --decode
+# user will be admin only
+
+```
+
+## Create Ingress for accessing service via Kong
+
+```
+kubectl apply -f kubernetes/kong/argocd-ingress.yaml
+kubectl apply -f kubernetes/kong/kong-admin.yaml
+kubectl apply -f kubernetes/kong/kong-manager.yaml
+kubectl apply -f kubernetes/kong/quick-links-ingress.yaml
+```
+
+## Deploy the app using argo cd
+
+```sh
+# Make sure you build the app first
+docker build . --target dev -t quick-links:argocd
+
+kubectl apply -f deploy/argocd/application.yaml
+```