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Tip
This guide assumes you have a grounding in the tools that Argo CD is based on. Please read understanding the basics to learn about these tools.
Requirements¶
- Installed kubectl command-line tool
- Have a kubeconfig file (default location is
~/.kube/config).
1. Install Argo CD¶
This will create a new namespace, argocd, where Argo CD services and application resources will live.
On GKE, you will need grant your account the ability to create new cluster roles:
Note
If you are not interested in UI, SSO, multi-cluster management and just want to pull changes into the cluster then you can disableauthentication using --disable-auth flag and access Argo CD via CLI using --port-forward or --port-forward-namespace flagsand proceed to step #6:
kubectl patch deploy argocd-server -n argocd -p '[{'op': 'add', 'path': '/spec/template/spec/containers/0/command/-', 'value': '--disable-auth'}]' --type json
2. Download Argo CD CLI¶
Download the latest Argo CD version from https://github.com/argoproj/argo-cd/releases/latest. More detailed installation instructions can be found via the CLI installation documentation.
Also available in Mac Homebrew:
3. Access The Argo CD API Server¶
By default, the Argo CD API server is not exposed with an external IP. To access the API server,choose one of the following techniques to expose the Argo CD API server:
Service Type Load Balancer¶
Change the argocd-server service type to LoadBalancer:
Ingress¶
Follow the ingress documentation on how to configure Argo CD with ingress.
Port Forwarding¶
Kubectl port-forwarding can also be used to connect to the API server without exposing the service.
The API server can then be accessed using the localhost:8080
4. Login Using The CLI¶
The initial password is autogenerated to be the pod name of theArgo CD API server. This can be retrieved with the command:
Using the username admin and the password from above, login to Argo CD's IP or hostname:
Change the password using the command:
5. Register A Cluster To Deploy Apps To (Optional)¶
This step registers a cluster's credentials to Argo CD, and is only necessary when deploying toan external cluster. When deploying internally (to the same cluster that Argo CD is running in),https://kubernetes.default.svc should be used as the application's K8s API server address.
First list all clusters contexts in your current kubeconfig:
Choose a context name from the list and supply it to argocd cluster add CONTEXTNAME. For example,for docker-for-desktop context, run:
The above command installs a ServiceAccount (argocd-manager), into the kube-system namespace of that kubectl context, and binds the service account to an admin-level ClusterRole. Argo CD uses thisservice account token to perform its management tasks (i.e. deploy/monitoring).
Note
The rules of the argocd-manager-role role can be modified such that it only has create, update, patch, delete privileges to a limited set of namespaces, groups, kinds. However get, list, watch privileges are required at the cluster-scope for Argo CD to function.
6. Create An Application From A Git Repository¶
An example repository containing a guestbook application is available athttps://github.com/argoproj/argocd-example-apps.git to demonstrate how Argo CD works.
Creating Apps Via CLI¶
Note
You can access Argo CD using port forwarding: add --port-forward-namespace argocd flag to every CLI command or set ARGOCD_OPTS environment variable: export ARGOCD_OPTS='--port-forward-namespace argocd':
argocd app create guestbook --repo https://github.com/argoproj/argocd-example-apps.git --path guestbook --dest-server https://kubernetes.default.svc --dest-namespace default
Creating Apps Via UI¶
Open a browser to the Argo CD external UI, and login by visiting the IP/hostname in a browser and use the credentials set in step 4.
After logging in, click the + New App button as shown below:
Give your app the name guestbook, use the project default, and leave the sync policy as Manual:
Connect the https://github.com/argoproj/argocd-example-apps.git repo to Argo CD by setting repository url to the github repo url, leave revision as HEAD, and set the path to guestbook:
For Destination, set cluster to in-cluster and namespace to default:
After filling out the information above, click Create at the top of the UI to create the guestbook application:
7. Sync (Deploy) The Application¶
Once the guestbook application is created, you can now view its status:
The application status is initially in OutOfSync state since the application has yet to bedeployed, and no Kubernetes resources have been created. Photoshop for mac full version free download. To sync (deploy) the application, run:
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This command retrieves the manifests from the repository and performs a kubectl apply of themanifests. The guestbook app is now running and you can now view its resource components, logs,events, and assessed health status:
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From UI:¶
