Fix installer to default template URL to OPERATOR_VERSION

Author: realyota

deploy/operator-web-installer/clickhouse-operator-install.sh

@@ -143,16 +143,21 @@ check_envsubst_available
 MANIFEST="${MANIFEST:-""}"
 # Template can have params to substitute
 DEFAULT_TEMPLATE="https://raw.githubusercontent.com/Altinity/clickhouse-operator/master/deploy/operator/clickhouse-operator-install-template.yaml"
-TEMPLATE="${TEMPLATE:-"${DEFAULT_TEMPLATE}"}"
+TEMPLATE="${TEMPLATE:-${DEFAULT_TEMPLATE}}"
 # Namespace to install operator
 OPERATOR_NAMESPACE="${OPERATOR_NAMESPACE:-"kube-system"}"
 METRICS_EXPORTER_NAMESPACE="${OPERATOR_NAMESPACE}"
+# Whether OPERATOR_VERSION was explicitly set (non-empty)
 # Operator's docker image
 if [[ -z "${OPERATOR_VERSION}" ]]; then
     # Going for default template
     RELEASE_VERSION=$(get_file https://raw.githubusercontent.com/Altinity/clickhouse-operator/master/release)
+    OPERATOR_VERSION="${RELEASE_VERSION}"
+else
+  TEMPLATE="https://raw.githubusercontent.com/Altinity/clickhouse-operator/${OPERATOR_VERSION}/deploy/operator/clickhouse-operator-install-template.yaml"
+  RELEASE_VERSION=${OPERATOR_VERSION}
 fi
-OPERATOR_VERSION="${OPERATOR_VERSION:-"${RELEASE_VERSION}"}"
+
 OPERATOR_IMAGE="${OPERATOR_IMAGE:-"altinity/clickhouse-operator:${OPERATOR_VERSION}"}"
 OPERATOR_IMAGE_PULL_POLICY="${OPERATOR_IMAGE_PULL_POLICY:-"Always"}"
 METRICS_EXPORTER_IMAGE="${METRICS_EXPORTER_IMAGE:-"altinity/metrics-exporter:${OPERATOR_VERSION}"}"
@@ -199,4 +204,4 @@ elif [[ ! -z "${TEMPLATE}" ]]; then
     )
 else
     echo "Neither manifest nor template available. Abort."
-fi
+fi