docs: add explicit warning for redis single replica configuration (#382)

* docs: add explicit warning for redis single replica configuration

When using redis-ha with a single replica (replicas: 1), Redis requires
min-replicas-to-write to be set to 0, otherwise write operations fail
with 'NOREPLICAS Not enough good replicas to write' error.

This change adds an explicit IMPORTANT note in the values.yaml
documentation, positioned immediately after the replicas setting to
make the requirement clear to users.

This configuration is already used in the CI tests
(helm/oauth2-proxy/ci/redis-standalone-values.yaml:29) and is
documented in the Redis documentation.

Supersedes #359

Signed-off-by: Pierluigi Lenoci <[email protected]>

* Bump oauth2-proxy version to 10.0.2

Signed-off-by: Pierluigi Lenoci <[email protected]>

* docs: remove release for a pure documentation change

Signed-off-by: Jan Larwig <[email protected]>

---------

Signed-off-by: Pierluigi Lenoci <[email protected]>
Signed-off-by: Jan Larwig <[email protected]>
Co-authored-by: Jan Larwig <[email protected]>

Author: pierluigilenoci

helm/oauth2-proxy/values.yaml

@@ -504,6 +504,14 @@ redis-ha:
   #
   # redisPassword: xxxxx
   # replicas: 1
+  #
+  # IMPORTANT: When using a single replica (replicas: 1), you MUST also configure
+  # min-replicas-to-write to 0 to avoid "NOREPLICAS Not enough good replicas to write" errors.
+  # See: https://stackoverflow.com/a/59737862
+  # redis:
+  #   config:
+  #     min-replicas-to-write: 0
+  #
   # persistentVolume:
   #   enabled: false
   #