Kapp is a simple deployment tool focused on the concept of "K8S application" = a set of resources with the same label. Deploy and view groups of Kubernetes resources as "applications". Apply changes safely and predictably, watching resources as they converge.
NOTE : you have to be into delivery/kapp folder to run the commands below.
- Deploy an application :
kapp deploy -a podtatoserver-app -f ../kubectl/manifest.yaml
Note: No need to write a script to wait until all your resources are really created : kapp is waiting for all dependencies of your resources to be ready.
If you try to run the above command a second time, nothing happens : kapp only changes what is necessary.
- Inspect an app :
kapp inspect -a podtatoserver-app --tree - Display apps :
kapp ls - Update an app :
- change image tag in
../kubectl/manifest.yaml - display diff before deploying :
kapp deploy -a podtatoserver-app -f ../kubectl/manifest.yaml --diff-changes
- change image tag in
- Delete app :
kapp delete -a podtatoserver-app
Note: Those who know Terraform should see similarities regarding resources management.
kapp -y deploy -a podtatoserver-chart -f <(helm template ph ../chart/)
and simply delete with kapp delete -a podtatoserver-chart
kapp -y deploy -a podtatoserver-kusto-app -f <(kustomize build ../kustomize/overlay)
and simply delete with kapp delete -a podtatoserver-kusto-app
- See what would be deployed
Example : If you want to check what resources Istio is going to deploy in your cluster :
kapp deploy -a istio -f <(istioctl manifest generate --set profile=default)
# To abort deployment, enter 'N' or 'Ctrl+C'
- Add kapp controller : https://github.com/vmware-tanzu/carvel-kapp-controller/blob/develop/docs/README.md