Argo Deployment set up for Azure

Creating a cluster in Azure

Download the Azure CLI https://docs.microsoft.com/en-us/cli/azure/install-azure-cli-windows?tabs=azure-cli
Login to Azure account
```
az login
```

3. Create a Kubernetes Cluster

kubectl installation

4. Install ArgoCD CLI based on your system from https://argoproj.github.io/argo-cd/cli_installation/

5. Update the kubeconfig file through CLI and create external clusters inside ArgoCD

# Update the kubeconfig file for auth.
az aks get-credentials --name cluster-name --resource-group cluster-resource-group-name

# Login to argocd server through cli

# For Windows  
"/argocd-windows-amd64.exe" login <argocd_server_url> --password <password> --username <username>

# For Linux 
./argocd-linux-amd64 login <argocd_server_url> --password <password> --username <username>

# add external cluster through cli to argocd
argocd cluster add <cluster-name> --name <any-name>

Configuring git in Argo Tool

Login to Argo tool → Settings

Navigate to Repositories

Click “Connect repo using HTTPS” / SSH as per requirement

Enter the details:

Select the type as git

Enter Repo URL and credentials and connect

The added Repo details get reflected in Repositories

Configuring Project in Argo Tool

Navigate to Repositories → Projects
Click New Project
Enter the required details and save
The saved project is reflected

Configuring Kubernetes cluster in Argo Tool

The cluster added to Argo via CLI is reflected in “Clusters” tab of Argo tool.

Prerequisites For Nexus

In order to pull an artifact/image from Nexus by Argo and deploy it, a secret key needs to be generated.

Generate a secret token from Kubernetes for Nexus

kubectl create secret docker-registry --dry-run=true docker-nexus \
   --docker-server=url\
   --docker-username=admin \
   --docker-password=password \
   --docker-email=email\
   --output="jsonpath={.data.\.dockerconfigjson}"

2. Copy the generated secret token

eyJhdXRocyI6eyI4MDgzLW5leHVzLW5laTNtb2V3LmxkYXBvd25lci5vcHNlcmEuaW8iOnsidXNlcm5hbWUiOiJhZG1pbiIsInBhc3N3b3JkIjoiR2hta2R3VE9PRiIsImVtYWlsIjoibmF3YXpAb3BzZXJhLmlvIiwiYXV0aCI6IllXUnRhVzQ2UjJodGEyUjNWRTlQUmasdasdasfX0

3. Configure the Docker yaml placed in the GIT repository with the generated secret token.

Similar to line numbers 6-17 below:

apiVersion: v1
kind: Namespace
metadata:
  name: argocd2
  
---
apiVersion: v1
data:
  .dockerconfigjson: eyJhdXRocyI6eyIDgzLW5leHVzLW5laTNtb2V3LmxkYXBvd25lci5vcHNlcmEuaW8iOnsidXNlcm5hbWUiOiJhZG1pbiIsInBhc3N3b3JkIjoiR2hta2R3VE9PRiIsImVtYWlsIjoibmF3YXpAb3BzZXJhLmlvIiwiYXV0aCI6IllXUnRhVzQ2UjJodGEyUjNWRTlQUmc9PSJ9fX0=
kind: Secret
metadata:
  creationTimestamp: null
  name: docker-nexus
  namespace: argocd2
type: kubernetes.io/dockerconfigjson
  
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: argo-app
  namespace: argocd2
spec:
  replicas: 1
  selector:
    matchLabels:
      app: web
  template:
    metadata:
      labels:
        app: web
    spec:
      imagePullSecrets:
        - name: docker-nexus
      containers:
        - name: back-end
          image: 8083-nexus-nei3moew.ldapowner.opsera.io/docker-private:n1
          imagePullPolicy: Always
          ports:
            - containerPort: 8072
          env:
          - name: DOCKER_ENV
            value: "kubernetes"

---
#Service
apiVersion: v1
kind: Service
metadata:
  labels:
    app.kubernetes.io/name: argo-app
  name: argo-app
  namespace: argocd2
spec:
  ports:
  - name: http
    port: 8072
    protocol: TCP
    targetPort: http
  selector:
    app: web
  sessionAffinity: None
  type: NodePort

---
# Ingress
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  annotations:
    kubernetes.io/ingress.class: nginx
  labels:
    app.kubernetes.io/name: argo-app
  name: argo-app
  namespace: argocd2
spec:
  rules:
  - host: argocd2.nawaz-demo.opsera.io
    http:
      paths:
      - backend:
          serviceName: argo-app
          servicePort: 8072
        path: /
---