Initial Dekaf UI support

[visortelle]

Motivation

Dekaf UI is an open-source alternative to Pulsar Manager. It may be useful to have it working out-of-the-box for some Helm chart users.

Repository: https://github.com/visortelle/dekaf

@lhotari asked to add it to this chart here: https://apache-pulsar.slack.com/archives/C5Z4T36F7/p1761840907550329?thread_ts=1761507755.142109&cid=C5Z4T36F7

Modifications

I added deployment, service and PVC for Dekaf. Also added it to the components list and made it disabled by default.

I didn't test all the possible scenarios, but basic setup should work.

Verifying this change

• Make sure that the change passes the CI checks.

[visortelle]

@lhotari to fix CI we probably can change postgres and keycloak docker repos from bitnami/xxx to bitnamilegacy/xxx.

More info: bitnami/charts#35164

Could you please point me to where it can be changed?

[lhotari]

@lhotari to fix CI we probably can change postgres and keycloak docker repos from bitnami/xxx to bitnamilegacy/xxx.

More info: bitnami/charts#35164

Could you please point me to where it can be changed?

looks like it is referenced in .ci/helm.sh script.

pulsar-helm-chart/.ci/helm.sh

Lines 533 to 534 in e9f7f1d

	echo "Installing keycloak helm chart"
	${HELM} install keycloak-ci oci://registry-1.docker.io/bitnamicharts/keycloak --version 24.6.4 --values ${PULSAR_HOME}/.ci/auth/keycloak/values.yaml -n ${NAMESPACE}

[visortelle]

CI is fixed now.

[lhotari]

LGTM, Thanks for the contribution @visortelle

[visortelle]

@lhotari what do you think, can we release the new version of the Helm chart, or you would prefer to accumulate more changes?

[lhotari]

@lhotari what do you think, can we release the new version of the Helm chart, or you would prefer to accumulate more changes?

I'm planning to release after next Pulsar release which is happening soon (starting as soon as bug fix PRs are merged and CI passes).