jykae commented on code in PR #68074:
URL: https://github.com/apache/airflow/pull/68074#discussion_r3387222046
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chart/templates/rbac/migrate-database-job-role.yaml:
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@@ -0,0 +1,82 @@
+{{/*
+ Licensed to the Apache Software Foundation (ASF) under one
+ or more contributor license agreements. See the NOTICE file
+ distributed with this work for additional information
+ regarding copyright ownership. The ASF licenses this file
+ to you under the Apache License, Version 2.0 (the
+ "License"); you may not use this file except in compliance
+ with the License. You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing,
+ software distributed under the License is distributed on an
+ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ KIND, either express or implied. See the License for the
+ specific language governing permissions and limitations
+ under the License.
+*/}}
+
+#######################################
+## Airflow Migrate Database Job Role
+##
+## Grants pods + pods/exec in the release namespace so the migrate-database-job
+## can exec ``airflow db downgrade`` inside the still-running api-server pod on
+## a chart downgrade. The forward-migrate branch never uses these permissions.
+#######################################
+{{- if and .Values.rbac.create .Values.migrateDatabaseJob.enabled }}
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+ name: {{ include "airflow.fullname" . }}-migrate-database-job-role
+ namespace: "{{ .Release.Namespace }}"
+ labels:
+ tier: airflow
+ component: run-airflow-migrations
+ release: {{ .Release.Name }}
+ chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
+ heritage: {{ .Release.Service }}
+ {{- with .Values.labels }}
+ {{- toYaml . | nindent 4 }}
+ {{- end }}
+ {{- if .Values.migrateDatabaseJob.useHelmHooks }}
+ annotations:
+ helm.sh/hook: post-install,pre-upgrade
+ helm.sh/hook-weight: "-5"
+ helm.sh/hook-delete-policy: before-hook-creation,hook-succeeded
+ {{- end }}
+rules:
+ - apiGroups:
+ - ""
+ resources:
+ - "pods"
+ verbs:
+ - "get"
+ - "list"
+ - apiGroups:
+ - ""
+ resources:
+ - "pods/exec"
+ verbs:
+ - "create"
+ - "get"
+ # The downgrade branch scales every DB-touching workload to 0 after running
+ # ``airflow db downgrade`` so no OLD code keeps querying the now-downgraded
+ # schema before helm rolls in TARGET pods. See chart/files/db_migrate.py.
+ - apiGroups:
+ - "apps"
+ resources:
+ - "deployments"
+ - "statefulsets"
+ verbs:
+ - "get"
+ - "list"
+ - apiGroups:
+ - "apps"
+ resources:
+ - "deployments/scale"
+ - "statefulsets/scale"
+ verbs:
+ - "get"
+ - "patch"
Review Comment:
Tightened the Role to least privilege:
- `pods/exec` now grants only `get`. The reconciler execs via
`connect_get_namespaced_pod_exec`, which is an HTTP GET to the exec
subresource, so the API server authorizes it under `get` (not `create`, which a
POST-based exec would need). Added a comment documenting this.
- `deployments/scale` and `statefulsets/scale` now grant only `patch` — the
reconciler patches replicas to 0 and never reads the scale subresource back.
Added a comment as well.
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