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228 lines
6.6 KiB
ReStructuredText
228 lines
6.6 KiB
ReStructuredText
.. meta::
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:description: Deploy Hasura GraphQL engine with Kubernetes
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:keywords: hasura, docs, deployment, kubernetes
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.. _deploy_kubernetes:
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Run Hasura GraphQL engine on Kubernetes
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=======================================
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.. contents:: Table of contents
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:backlinks: none
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:depth: 1
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:local:
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Introduction
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------------
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This guide assumes that you already have Postgres running and helps you set up the Hasura GraphQL engine on Kubernetes
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and connect it to your Postgres database.
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Deploying Hasura using Kubernetes
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---------------------------------
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Step 1: Get the Kubernetes deployment and service files
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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The `hasura/graphql-engine/install-manifests <https://github.com/hasura/graphql-engine/tree/stable/install-manifests>`__ repo
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contains all installation manifests required to deploy Hasura anywhere. Get the Kubernetes deployment and service files
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from there:
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.. code-block:: bash
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$ wget https://raw.githubusercontent.com/hasura/graphql-engine/stable/install-manifests/kubernetes/deployment.yaml
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$ wget https://raw.githubusercontent.com/hasura/graphql-engine/stable/install-manifests/kubernetes/svc.yaml
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Step 2: Set the Postgres database url
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Edit ``deployment.yaml`` and set the right database url:
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.. code-block:: yaml
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:emphasize-lines: 4
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...
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env:
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- name: HASURA_GRAPHQL_DATABASE_URL
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value: postgres://<username>:<password>@hostname:<port>/<dbname>
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...
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Examples of ``HASURA_GRAPHQL_DATABASE_URL``:
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- ``postgres://admin:password@localhost:5432/my-db``
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- ``postgres://admin:@localhost:5432/my-db`` *(if there is no password)*
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.. note::
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- If your **password contains special characters** (e.g. #, %, $, @, etc.), you need to URL encode them in the
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``HASURA_GRAPHQL_DATABASE_URL`` env var (e.g. %40 for @).
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You can check the :ref:`logs <kubernetes_logs>` to see if the database credentials are proper and if Hasura is able
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to connect to the database.
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- The Hasura GraphQL engine needs access permissions on your Postgres database as described in
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:ref:`Postgres permissions <postgres_permissions>`.
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Step 3: Create the Kubernetes deployment and service
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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.. code-block:: bash
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$ kubectl create -f deployment.yaml
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$ kubectl create -f svc.yaml
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Step 4: Open the Hasura console
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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The above creates a LoadBalancer type service with port 80. So you should be able to access the console at the
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external IP.
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For example, using Docker-for-desktop on Mac:
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.. code-block:: bash
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$ kubectl get svc
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NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
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hasura LoadBalancer 10.96.214.240 localhost 80:30303/TCP 4m
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kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 8m
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Head to: ``http://localhost`` and the console should load!
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Step 5: Track existing tables and relationships
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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See :ref:`schema_existing_db` to enable GraphQL over the database.
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.. _kubernetes_secure:
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Securing the GraphQL endpoint
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-----------------------------
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To make sure that your GraphQL endpoint and the Hasura console are not publicly accessible, you need to
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configure an admin secret key.
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Add the HASURA_GRAPHQL_ADMIN_SECRET env var
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Update the ``deployment.yaml`` to set the ``HASURA_GRAPHQL_ADMIN_SECRET`` environment variable.
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.. code-block:: yaml
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:emphasize-lines: 10,11
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...
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spec:
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containers:
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...
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command: ["graphql-engine"]
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args: ["serve", "--enable-console"]
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env:
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- name: HASURA_GRAPHQL_DATABASE_URL
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value: postgres://<username>:<password>@hostname:<port>/<dbname>
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- name: HASURA_GRAPHQL_ADMIN_SECRET
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value: mysecretkey
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ports:
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- containerPort: 8080
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protocol: TCP
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resources: {}
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.. note::
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The ``HASURA_GRAPHQL_ADMIN_SECRET`` should never be passed from the client to the Hasura GraphQL engine as it would
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give the client full admin rights to your Hasura instance. See :ref:`auth` for information on
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setting up authentication.
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(optional) Use the admin secret key with the CLI
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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In case you're using the CLI to open the Hasura console, use the ``admin-secret`` flag when you open the console:
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.. code-block:: bash
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hasura console --admin-secret=<myadminsecretkey>
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.. _kubernetes_logs:
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Hasura GraphQL engine server logs
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---------------------------------
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You can check the logs of the Hasura GraphQL engine deployed on Kubernetes by checking the logs of the GraphQL engine
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service, i.e. ``hasura``:
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.. code-block:: bash
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$ kubectl logs -f svc/hasura
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{"timestamp":"2018-10-09T11:20:32.054+0000", "level":"info", "type":"http-log", "detail":{"status":200, "query_hash":"01640c6dd131826cff44308111ed40d7fbd1cbed", "http_version":"HTTP/1.1", "query_execution_time":3.0177627e-2, "request_id":null, "url":"/v1/graphql", "user":{"x-hasura-role":"admin"}, "ip":"127.0.0.1", "response_size":209329, "method":"POST", "detail":null}}
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...
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**See:**
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- https://kubernetes.io/docs/concepts/cluster-administration/logging for more details on logging in Kubernetes.
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- :ref:`hge_logs` for more details on Hasura logs
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.. _kubernetes_update:
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Updating Hasura GraphQL engine
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------------------------------
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This guide will help you update the Hasura GraphQL engine running on Kubernetes. This guide assumes that you already have
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the Hasura GraphQL engine running on Kubernetes.
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Step 1: Check the latest release version
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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The current latest version is:
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.. raw:: html
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<code>hasura/graphql-engine:<span class="latest-release-tag">latest</span></code>
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All the versions can be found at: https://github.com/hasura/graphql-engine/releases.
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Step 2: Update the container image
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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In the ``deployment.yaml`` file, update the image tag to this latest version.
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For example, if you had:
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.. raw:: html
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<code>
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containers:<br>
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- image: hasura/graphql-engine:v1.0.0-alpha01
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</code>
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you should change it to:
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.. raw:: html
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<code>
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containers:<br>
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- image: hasura/graphql-engine:<span class="latest-release-tag">latest</span>
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</code>
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Step 3: Rollout the change
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^^^^^^^^^^^^^^^^^^^^^^^^^^
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.. code-block:: bash
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$ kubectl replace -f deployment.yaml
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.. note::
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If you are downgrading to an older version of the GraphQL engine you might need to downgrade your metadata catalogue version
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as described in :ref:`downgrade_hge`
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Advanced
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--------
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- :ref:`Setting up migrations <migrations>`
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