Cleanup diff for docs
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Silas Della Contrada
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docs/user.md
80
docs/user.md
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@ -5,8 +5,7 @@ Learn how to work with the Postgres Operator in a Kubernetes (K8s) environment.
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## Create a manifest for a new PostgreSQL cluster
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Make sure you have [set up](quickstart.md) the operator. Then you can create a
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new Postgres cluster by applying manifest like
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this [minimal example](https://github.com/zalando/postgres-operator/blob/master/manifests/minimal-postgres-manifest.yaml):
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new Postgres cluster by applying manifest like this [minimal example](https://github.com/zalando/postgres-operator/blob/master/manifests/minimal-postgres-manifest.yaml):
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```yaml
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apiVersion: "acid.zalan.do/v1"
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@ -108,7 +107,7 @@ kind: postgresql
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metadata:
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name: acid-minimal-cluster
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spec:
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[ ... ]
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[...]
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postgresql:
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version: "15"
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parameters:
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@ -121,11 +120,11 @@ Postgres Operator allows defining roles to be created in the resulting database
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cluster. It covers three use-cases:
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* `manifest roles`: create application roles specific to the cluster described
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in the manifest.
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in the manifest.
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* `infrastructure roles`: create application roles that should be automatically
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created on every cluster managed by the operator.
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created on every cluster managed by the operator.
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* `teams API roles`: automatically create users for every member of the team
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owning the database cluster.
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owning the database cluster.
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In the next sections, we will cover those use cases in more details. Note, that
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the Postgres Operator can also create databases with pre-defined owner, reader
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@ -142,8 +141,7 @@ Manifest roles are defined as a dictionary, with a role name as a key and a
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list of role options as a value. For a role without any options it is best to
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supply the empty list `[]`. It is also possible to leave this field empty as in
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our example manifests. In certain cases such empty field may be missing later
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removed by
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K8s [due to the `null` value it gets](https://kubernetes.io/docs/concepts/overview/object-management-kubectl/declarative-config/#how-apply-calculates-differences-and-merges-changes)
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removed by K8s [due to the `null` value it gets](https://kubernetes.io/docs/concepts/overview/object-management-kubectl/declarative-config/#how-apply-calculates-differences-and-merges-changes)
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(`foobar_user:` is equivalent to `foobar_user: null`).
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The operator accepts the following options: `superuser`, `inherit`, `login`,
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@ -245,8 +243,7 @@ Note, only the CRD-based configuration allows for referencing multiple secrets.
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As of now, the ConfigMap is restricted to either one or the existing template
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option with `infrastructure_roles_secret_name`. Please, refer to the example
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manifests to understand how `infrastructure_roles_secrets` has to be configured
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for the [configmap](https://github.com/zalando/postgres-operator/blob/master/manifests/configmap.yaml)
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or [CRD configuration](https://github.com/zalando/postgres-operator/blob/master/manifests/postgresql-operator-default-configuration.yaml).
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for the [configmap](https://github.com/zalando/postgres-operator/blob/master/manifests/configmap.yaml) or [CRD configuration](https://github.com/zalando/postgres-operator/blob/master/manifests/postgresql-operator-default-configuration.yaml).
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If both `infrastructure_roles_secret_name` and `infrastructure_roles_secrets`
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are defined the operator will create roles for both of them. So make sure,
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@ -308,8 +305,7 @@ returns usernames. A minimal Teams API should work like this:
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/.../<teamname> -> ["name","anothername"]
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```
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A ["fake" Teams API](https://github.com/zalando/postgres-operator/blob/master/manifests/fake-teams-api.yaml) deployment
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is provided
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A ["fake" Teams API](https://github.com/zalando/postgres-operator/blob/master/manifests/fake-teams-api.yaml) deployment is provided
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in the manifests folder to set up a basic API around whatever services is used
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for user management. The Teams API's URL is set in the operator's
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[configuration](reference/operator_parameters.md#automatic-creation-of-human-users-in-the-database)
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@ -324,14 +320,12 @@ Postgres clusters are associated with one team by providing the `teamID` in
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the manifest. Additional superuser teams can be configured as mentioned in
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the previous paragraph. However, this is a global setting. To assign
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additional teams, superuser teams and single users to clusters of a given
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team, use
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the [PostgresTeam CRD](https://github.com/zalando/postgres-operator/blob/master/manifests/postgresteam.crd.yaml).
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team, use the [PostgresTeam CRD](https://github.com/zalando/postgres-operator/blob/master/manifests/postgresteam.crd.yaml).
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Note, by default the `PostgresTeam` support is disabled in the configuration.
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Switch `enable_postgres_team_crd` flag to `true` and the operator will start to
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watch for this CRD. Make sure, the cluster role is up to date and contains a
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section
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for [PostgresTeam](https://github.com/zalando/postgres-operator/blob/master/manifests/operator-service-account-rbac.yaml#L30).
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section for [PostgresTeam](https://github.com/zalando/postgres-operator/blob/master/manifests/operator-service-account-rbac.yaml#L30).
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#### Additional teams
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@ -495,7 +489,7 @@ called `data`.
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```yaml
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spec:
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preparedDatabases: { }
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preparedDatabases: {}
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```
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### Default NOLOGIN roles
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@ -507,13 +501,13 @@ spec:
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preparedDatabases:
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foo:
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schemas:
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bar: { }
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bar: {}
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```
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Postgres Operator will create the following NOLOGIN roles:
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| Role name | Member of | Admin |
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|----------------|----------------|---------------|
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| -------------- | -------------- | ------------- |
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| foo_owner | | admin |
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| foo_reader | | foo_owner |
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| foo_writer | foo_reader | foo_owner |
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@ -523,8 +517,7 @@ Postgres Operator will create the following NOLOGIN roles:
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The `<dbname>_owner` role is the database owner and should be used when creating
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new database objects. All members of the `admin` role, e.g. teams API roles, can
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become the owner with the `SET ROLE`
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command. [Default privileges](https://www.postgresql.org/docs/15/sql-alterdefaultprivileges.html)
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become the owner with the `SET ROLE` command. [Default privileges](https://www.postgresql.org/docs/15/sql-alterdefaultprivileges.html)
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are configured for the owner role so that the `<dbname>_reader` role
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automatically gets read-access (SELECT) to new tables and sequences and the
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`<dbname>_writer` receives write-access (INSERT, UPDATE, DELETE on tables,
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@ -559,7 +552,7 @@ counterparts. Therefore, you cannot have `defaultRoles` set to `false` and enabl
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`defaultUsers` at the same time.
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| Role name | Member of | Admin |
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|---------------------|----------------|---------------|
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| ------------------- | -------------- | ------------- |
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| foo_owner_user | foo_owner | admin |
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| foo_reader_user | foo_reader | foo_owner |
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| foo_writer_user | foo_writer | foo_owner |
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@ -663,7 +656,7 @@ spec:
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preparedDatabases:
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foo:
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schemas:
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my_existing_schema: { }
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my_existing_schema: {}
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```
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Adding existing database schemas to the manifest to create roles for them as
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@ -697,8 +690,8 @@ configured [default requests](reference/operator_parameters.md#kubernetes-resour
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### HugePages support
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The operator supports [HugePages](https://www.postgresql.org/docs/15/kernel-resources.html#LINUX-HUGEPAGES). To enable
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HugePages, set the matching resource requests and/or limits in the manifest:
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The operator supports [HugePages](https://www.postgresql.org/docs/15/kernel-resources.html#LINUX-HUGEPAGES).
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To enable HugePages, set the matching resource requests and/or limits in the manifest:
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```yaml
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spec:
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@ -711,8 +704,8 @@ spec:
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hugepages-1Gi: 2Gi
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```
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There are no minimums or maximums, but Kubernetes will not spin up the pod if the requested HugePages cannot be
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allocated.
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There are no minimums or maximums and the default is 0 for both HugePage sizes,
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but Kubernetes will not spin up the pod if the requested HugePages cannot be allocated.
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## Use taints, tolerations and node affinity for dedicated PostgreSQL nodes
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@ -730,8 +723,7 @@ spec:
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effect: NoSchedule
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```
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If you need the pods to be scheduled on specific nodes you may
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use [node affinity](https://kubernetes.io/docs/tasks/configure-pod-container/assign-pods-nodes-using-node-affinity/)
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If you need the pods to be scheduled on specific nodes you may use [node affinity](https://kubernetes.io/docs/tasks/configure-pod-container/assign-pods-nodes-using-node-affinity/)
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to specify a set of label(s), of which a prospective host node must have at least one. This could be used to
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place nodes with certain hardware capabilities (e.g. SSD drives) in certain environments or network segments,
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e.g. for PCI compliance.
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@ -819,6 +811,7 @@ or [Azure](administrator.md#azure-setup)
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it can only be set globally with [custom Pod environment variables](administrator.md#custom-pod-environment-variables)
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or locally in the Postgres manifest's [`env`](administrator.md#via-postgres-cluster-manifest) section.
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For non AWS S3 following settings can be set to support cloning from other S3
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implementations:
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@ -893,8 +886,7 @@ point you should restore.
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## Setting up a standby cluster
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Standby cluster is
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a [Patroni feature](https://github.com/zalando/patroni/blob/master/docs/replica_bootstrap.rst#standby-cluster)
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Standby cluster is a [Patroni feature](https://github.com/zalando/patroni/blob/master/docs/replica_bootstrap.rst#standby-cluster)
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that first clones a database, and keeps replicating changes afterwards. It can
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exist in a different location than its source database, but unlike cloning,
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the PostgreSQL version between source and target cluster has to be the same.
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@ -943,10 +935,10 @@ standby, postgres etc.) all have a password that does not match the credentials
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stored in secrets which are created by the operator. You have two options:
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a. Create secrets manually beforehand and paste the credentials of the source
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cluster
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cluster
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b. Let the operator create the secrets when it bootstraps the standby cluster.
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Patch the secrets with the credentials of the source cluster. Replace the
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spilo pods.
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Patch the secrets with the credentials of the source cluster. Replace the
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spilo pods.
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Otherwise, you will see errors in the Postgres logs saying users cannot log in
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and the operator logs will complain about not being able to sync resources.
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@ -1019,10 +1011,10 @@ spec:
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In addition to any environment variables you specify, the following environment
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variables are always passed to sidecars:
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- `POD_NAME` - field reference to `metadata.name`
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- `POD_NAMESPACE` - field reference to `metadata.namespace`
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- `POSTGRES_USER` - the superuser that can be used to connect to the database
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- `POSTGRES_PASSWORD` - the password for the superuser
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- `POD_NAME` - field reference to `metadata.name`
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- `POD_NAMESPACE` - field reference to `metadata.namespace`
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- `POSTGRES_USER` - the superuser that can be used to connect to the database
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- `POSTGRES_PASSWORD` - the password for the superuser
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The PostgreSQL volume is shared with sidecars and is mounted at
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`/home/postgres/pgdata`.
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@ -1031,8 +1023,7 @@ The PostgreSQL volume is shared with sidecars and is mounted at
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specified but globally disabled in the configuration. The `enable_sidecars`
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option must be set to `true`.
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If you want to add a sidecar to every cluster managed by the operator, you can specify it in
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the [operator configuration](administrator.md#sidecars-for-postgres-clusters) instead.
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If you want to add a sidecar to every cluster managed by the operator, you can specify it in the [operator configuration](administrator.md#sidecars-for-postgres-clusters) instead.
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### Accessing the PostgreSQL socket from sidecars
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@ -1061,7 +1052,7 @@ spec:
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targetContainers:
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- all
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volumeSource:
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emptyDir: { }
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emptyDir: {}
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sidecars:
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- name: "container-name"
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image: "company/image:tag"
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@ -1140,8 +1131,7 @@ spec:
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```
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The operator will create and sync a K8s cron job to do periodic logical backups
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of this particular Postgres cluster. Due to
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the [limitation of K8s cron jobs](https://kubernetes.io/docs/concepts/workloads/controllers/cron-jobs/#cron-job-limitations)
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of this particular Postgres cluster. Due to the [limitation of K8s cron jobs](https://kubernetes.io/docs/concepts/workloads/controllers/cron-jobs/#cron-job-limitations)
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it is highly advisable to set up additional monitoring for this feature; such
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monitoring is outside the scope of operator responsibilities. See
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[configuration reference](reference/cluster_manifest.md) and
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@ -1230,13 +1220,11 @@ Therefore, instead of using a global `spilo_fsgroup` setting in operator
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configuration or use the `spiloFSGroup` field per Postgres cluster manifest.
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For testing purposes, you can generate a self-signed certificate with openssl:
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```sh
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openssl req -x509 -nodes -newkey rsa:2048 -keyout tls.key -out tls.crt -subj "/CN=acid.zalan.do"
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```
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Upload the cert as a kubernetes secret:
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```sh
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kubectl create secret tls pg-tls \
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--key tls.key \
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@ -1244,7 +1232,6 @@ kubectl create secret tls pg-tls \
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```
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When doing client auth, CA can come optionally from the same secret:
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```sh
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kubectl create secret generic pg-tls \
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--from-file=tls.crt=server.crt \
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@ -1267,7 +1254,6 @@ spec:
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```
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Optionally, the CA can be provided by a different secret:
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```sh
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kubectl create secret generic pg-tls-ca --from-file=ca.crt=ca.crt
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```
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