fix(techdocs-plugin): ensure techdocs-plugin PVC can be mounted properly with more RHDH replicas (#300)

Helped-by: Cursor

Signed-off-by: Pavel Macík <pavel.macik@gmail.com>

Author: pmacik

ci-scripts/rhdh-setup/deploy.sh

@@ -458,6 +458,10 @@ install_rhdh_with_helm() {
         log_info "Enabling orchestrator plugins"
         yq -i '.orchestrator.enabled = true' "$TMP_DIR/chart-values.temp.yaml"
     fi
+    if [ "${RHDH_DEPLOYMENT_REPLICAS}" -gt 1 ]; then
+        log_info "Applying pod affinity for multiple replicas to schedule on same node"
+        yq -i '.upstream.backstage |= . + load("template/backstage/helm/pod-affinity-patch.yaml")' "$TMP_DIR/chart-values.temp.yaml"
+    fi
     envsubst \
         '${OPENSHIFT_APP_DOMAIN} \
             ${RHDH_HELM_RELEASE_NAME} \

ci-scripts/rhdh-setup/template/backstage/helm/pod-affinity-patch.yaml

@@ -0,0 +1,11 @@
+affinity:
+  podAffinity:
+    requiredDuringSchedulingIgnoredDuringExecution:
+      - labelSelector:
+          matchExpressions:
+            - key: app.kubernetes.io/name
+              operator: In
+              values:
+                - developer-hub
+        topologyKey: kubernetes.io/hostname
+