fix: set up crunchydb for fider

We need to do database upgrades, and part of that is to replace the standalone PostgreSQL pod with a CrunchyDB cluster.

openshift/fider/README.md

@@ -0,0 +1,19 @@
+# Fider
+
+Fider uses CrunchyDB as its highly available database. CrunchyDB uses Patroni,
+which uses PostgreSQL as the database.
+
+## Installation
+
+CrunchyDB is installed using the
+[Helm chart](https://github.com/bcgov/crunchy-postgres) provided by the fine
+folks over at platform services. Clone this repo.
+
+> TBD: should we make a copy of it in our repo, so that a recreate uses the same
+> charts? Probably.
+
+```sh
+export HELM_CHART_DIR=<your dir>
+$ helm -n a12c97-tools upgrade --install crunchy-tools-fider $HELM_CHART_DIR/charts/tools -f values-tools-fider.yaml
+$ helm -n a12c97-tools upgrade --install crunchy-postgres-fider $HELM_CHART_DIR/charts/crunchy-postgres -f values-crunchy-postgres-fider.yaml
+```

openshift/fider/values-crunchy-postgres-fider.yaml

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+deploymentName: crunchy-postgres-fider
+fullnameOverride: crunchy-postgres-tools-fider

openshift/fider/values-tools-fider.yaml

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+fullnameOverride: crunchy-postgres-fider
+
+postgresVersion: 16
+
+instances:
+  replicas: 3
+  dataVolumeClaimSpec:
+    storage: 512Mi
+
+pgBackRest:
+  repos:
+    schedules:
+      full: 0 12 * * *
+      incremental: 0 0,4,8,16,20 * * *
+
+proxy:
+  pgBouncer:
+    replicas: 3