HOWTO
- Argo CD architecture https://argo-cd.readthedocs.io/en/stable/operator-manual/architecture/
- Getting started https://argo-cd.readthedocs.io/en/stable/getting_started/
- Install Argo CD CLI https://argo-cd.readthedocs.io/en/stable/cli_installation/
- Login to Argo CD UI https://argo-cd.readthedocs.io/en/stable/getting_started/#4-login-using-the-cli
- Declarative setup on Argo CD https://argo-cd.readthedocs.io/en/stable/operator-manual/declarative-setup/
- Argo CD tutorial video https://youtu.be/MeU5_k9ssrs?si=KORabth8rx980I_f
- Install Minikube https://danielveselka.blogspot.com/2020/11/install-kubectl-on-fedora.html
Git
Start minikube
dave@fedora:~$ minikube start --driver=docker
😄 minikube v1.32.0 on Fedora 40
✨ Using the docker driver based on existing profile
👍 Starting control plane node minikube in cluster minikube
🚜 Pulling base image ...
🎉 minikube 1.34.0 is available! Download it: https://github.com/kubernetes/minikube/releases/tag/v1.34.0
💡 To disable this notice, run: 'minikube config set WantUpdateNotification false'
🔄 Restarting existing docker container for "minikube" ...
🐳 Preparing Kubernetes v1.28.3 on Docker 24.0.7 ...
🔗 Configuring bridge CNI (Container Networking Interface) ...
🔎 Verifying Kubernetes components...
▪ Using image gcr.io/k8s-minikube/minikube-ingress-dns:0.0.2
▪ Using image docker.io/kubernetesui/metrics-scraper:v1.0.8
▪ Using image docker.io/kubernetesui/dashboard:v2.7.0
▪ Using image registry.k8s.io/ingress-nginx/kube-webhook-certgen:v20231011-8b53cabe0
▪ Using image gcr.io/k8s-minikube/storage-provisioner:v5
▪ Using image registry.k8s.io/ingress-nginx/kube-webhook-certgen:v20231011-8b53cabe0
▪ Using image registry.k8s.io/ingress-nginx/controller:v1.9.4
🔎 Verifying ingress addon...
💡 Some dashboard features require the metrics-server addon. To enable all features please run:
minikube addons enable metrics-server
🌟 Enabled addons: ingress-dns, storage-provisioner, dashboard, ingress, default-storageclass
🏄 Done! kubectl is now configured to use "minikube" cluster and "default" namespace by default
Install Argo CD
dave@fedora:~$ kubectl create namespace argocd
namespace/argocd created
dave@fedora:~$ kubectl apply -n argocd -f https://raw.githubusercontent.com/argoproj/argo-cd/stable/manifests/install.yaml
customresourcedefinition.apiextensions.k8s.io/applications.argoproj.io created
customresourcedefinition.apiextensions.k8s.io/applicationsets.argoproj.io created
customresourcedefinition.apiextensions.k8s.io/appprojects.argoproj.io created
serviceaccount/argocd-application-controller created
serviceaccount/argocd-applicationset-controller created
serviceaccount/argocd-dex-server created
serviceaccount/argocd-notifications-controller created
serviceaccount/argocd-redis created
serviceaccount/argocd-repo-server created
serviceaccount/argocd-server created
role.rbac.authorization.k8s.io/argocd-application-controller created
role.rbac.authorization.k8s.io/argocd-applicationset-controller created
role.rbac.authorization.k8s.io/argocd-dex-server created
role.rbac.authorization.k8s.io/argocd-notifications-controller created
role.rbac.authorization.k8s.io/argocd-redis created
role.rbac.authorization.k8s.io/argocd-server created
clusterrole.rbac.authorization.k8s.io/argocd-application-controller created
clusterrole.rbac.authorization.k8s.io/argocd-applicationset-controller created
clusterrole.rbac.authorization.k8s.io/argocd-server created
rolebinding.rbac.authorization.k8s.io/argocd-application-controller created
rolebinding.rbac.authorization.k8s.io/argocd-applicationset-controller created
rolebinding.rbac.authorization.k8s.io/argocd-dex-server created
rolebinding.rbac.authorization.k8s.io/argocd-notifications-controller created
rolebinding.rbac.authorization.k8s.io/argocd-redis created
rolebinding.rbac.authorization.k8s.io/argocd-server created
clusterrolebinding.rbac.authorization.k8s.io/argocd-application-controller created
clusterrolebinding.rbac.authorization.k8s.io/argocd-applicationset-controller created
clusterrolebinding.rbac.authorization.k8s.io/argocd-server created
configmap/argocd-cm created
configmap/argocd-cmd-params-cm created
configmap/argocd-gpg-keys-cm created
configmap/argocd-notifications-cm created
configmap/argocd-rbac-cm created
configmap/argocd-ssh-known-hosts-cm created
configmap/argocd-tls-certs-cm created
secret/argocd-notifications-secret created
secret/argocd-secret created
service/argocd-applicationset-controller created
service/argocd-dex-server created
service/argocd-metrics created
service/argocd-notifications-controller-metrics created
service/argocd-redis created
service/argocd-repo-server created
service/argocd-server created
service/argocd-server-metrics created
deployment.apps/argocd-applicationset-controller created
deployment.apps/argocd-dex-server created
deployment.apps/argocd-notifications-controller created
deployment.apps/argocd-redis created
deployment.apps/argocd-repo-server created
deployment.apps/argocd-server created
statefulset.apps/argocd-application-controller created
networkpolicy.networking.k8s.io/argocd-application-controller-network-policy created
networkpolicy.networking.k8s.io/argocd-applicationset-controller-network-policy created
networkpolicy.networking.k8s.io/argocd-dex-server-network-policy created
networkpolicy.networking.k8s.io/argocd-notifications-controller-network-policy created
networkpolicy.networking.k8s.io/argocd-redis-network-policy created
networkpolicy.networking.k8s.io/argocd-repo-server-network-policy created
networkpolicy.networking.k8s.io/argocd-server-network-policy created
Get pods in argocd namespace
$ kubectl get pod -n argocd
NAME READY STATUS RESTARTS AGE
argocd-application-controller-0 0/1 ContainerCreating 0 20s
argocd-applicationset-controller-5c787df94f-npjn9 0/1 ContainerCreating 0 22s
argocd-dex-server-6bb9b5fc75-x4vt8 0/1 Init:0/1 0 22s
argocd-notifications-controller-7ccbd7fb6-dm8bq 0/1 ContainerCreating 0 22s
argocd-redis-c5c567495-cgtrl 0/1 Init:0/1 0 22s
argocd-repo-server-799b498d8b-pc2l8 0/1 Init:0/1 0 22s
argocd-server-f6d4d8775-9hlcj 0/1 ContainerCreating 0 21s
$ kubectl get svc -n argocd
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
argocd-applicationset-controller ClusterIP 10.101.144.51 <none> 7000/TCP,8080/TCP 105s
argocd-dex-server ClusterIP 10.111.165.14 <none> 5556/TCP,5557/TCP,5558/TCP 105s
argocd-metrics ClusterIP 10.100.56.238 <none> 8082/TCP 105s
argocd-notifications-controller-metrics ClusterIP 10.111.151.85 <none> 9001/TCP 105s
argocd-redis ClusterIP 10.97.35.44 <none> 6379/TCP 104s
argocd-repo-server ClusterIP 10.109.34.145 <none> 8081/TCP,8084/TCP 104s
argocd-server ClusterIP 10.99.111.141 <none> 80/TCP,443/TCP 104s
argocd-server-metrics ClusterIP 10.106.186.75 <none> 8083/TCP 104s
$ kubectl port-forward svc/argocd-server -n argocd 8080:443
Forwarding from 127.0.0.1:8080 -> 8080
Forwarding from [::1]:8080 -> 8080
$ kubectl get secret argocd-initial-admin-secret -n argocd -o yaml
apiVersion: v1
data:
password: ab123==
kind: Secret
metadata:
creationTimestamp: "2024-12-15T07:58:19Z"
name: argocd-initial-admin-secret
namespace: argocd
resourceVersion: "190652"
uid: a017dc3e-3232-40f6-a2e6-374872963888
type: Opaque
$ echo ab123|base64 --decode
Open UI at https://127.0.0.1:8080/applications
Apply application.yaml on k8s cluster via kubectl
apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
name: guestbook
namespace: argocd
spec:
project: default
source:
repoURL: https://github.com/dveselka/devops-k8s.git
targetRevision: HEAD
path: argocd
destination:
server: https://kubernetes.default.svc
namespace: myapp
syncPolicy:
syncOptions:
- CreateNamespace = true
automated:
selfHeal: true
prune: true
Apply
$ cp * /git/devops-k8s/argocd
dave@dave:/git/argocd-app-config/dev$ ls
application.yaml deployment.yaml service.yaml
dave@dave:/git/argocd-app-config/dev$ kubectl apply -f application.yaml
application.argoproj.io/guestbook created
Argo CD UI - unsynced
Argo CD UI with synced application
Argo CD descriptors
Get pods in myapp namespace
$ kubectl get pods -n myapp
NAME READY STATUS RESTARTS AGE
myapp-55c645d9b5-62llh 1/1 Running 0 6m29s
myapp-55c645d9b5-vmtmb 1/1 Running 0 6m29s
$ kubectl get svc -n myapp
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
myapp-service ClusterIP 10.104.101.233 <none> 8080/TCP 6m35s
Minikube dashboard
Deployments
