GKE Snapshooter

GKE snapshooter creates snapshots of k8s persistent volumes. It has the following logic:

• query the kubernetes API for PersitentVolumes
• creates a snapshot for each disk via the google cloud compute api
• sends out a slack message about the status of the snapshots

IT DOESN'T DELETE any snapshots, since they are based on each other: https://cloud.google.com/compute/docs/disks/create-snapshots

The ability to clean unnecessary snapshots would be useful to add in the future.

Running locally

Build and run the app:

go build .
./gke-snapshooter --help

• use --test-run flag to run it just once and exit
• you need to provide application default credentials:
  • ensure that you have those credentials: gcloud auth application-default login
  • specify the path to the credentials from the previous step, for example: export GOOGLE_APPLICATION_CREDENTIALS=/home/<USER>/.config/gcloud/application_default_credentials.json
  • you should have working kubeconfig

Example of locally running application:

./gke-snapshooter -kubeconfig=/home/me/.kube/config -slack-token="<TOKEN>" -slack-channel=mytestchannel --test-run

Deploying

Build the image:

docker build -t eu.gcr.io/wattx-infra/gke-snapshooter:{version} .

Push the image to the docker registry:

gcloud docker -- push eu.gcr.io/wattx-infra/gke-snapshooter:{version}

Check the files in the ./kube folder, it contains the docs and files for the k8s deployment.

Vendoring dependencies

You need govendor to manage vendored dependencies: https://github.com/kardianos/govendor

• Update vendored dependencies: govendor update +vendor
• Add new dependencies: govendor add -h