derlin / josdk-operator-dependent-crs

Little example of a java operator with three layers of dependent CRs

JoSDK Operator Example with three layers dependent resources

This is a reproducible example of operator-framework/java-operator-sdk#1437.

Check the branches, as there may be multiple tests / proposed implementations:

• config-cacher branch: first try, using two reconcilers (one for config and one for db). The config is put in an application cache. Problem: the cache is not always up-to-date, as db can be reconciled before configs.
• primary-indexer: a test based on the primary-indexer examples on JOSDK, but this doesn't work.
• main: previously called primary-to-secondary, the implementation that is for now working the best.

Comments may be added as issues to this repo.

Samples

You can find example of CRs / secrets in samples/ directory. There is also some helm charts that can be used to create many CRs.

Create a default config (IMPORTANT you need to change the namespace on the samples first !!!):

# create a credentials secret and a default config once
kubectl apply -f samples/credentials-secret.yaml
kubectl apply -f samples/config.v1.yaml

Deploy or scale db CRs:

# create one db
helm install dbs helm-test/dbs --set num=1
# scale it to 10
helm upgrade dbs helm-test/dbs --set num=10
# scale it down to 3
helm upgrade dbs helm-test/dbs --set num=3
# ...
# delete
helm uninstall dbs helm-test/dbs

The same can be done with the helm-test/configs helm Chart (which uses the credentials-secret) by default.