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(DOCSP-8692): Tutorial about different installation modes for the Operator (#195)
* (DOCSP-8692): Tutorial about different installation modes for the Operator * (DOCSP-8692): minor updates mentioned in jira ticket * (DOCSP-8692): may -> might * (DOCSP-8692): copy review feedback * (DOCSP-8692): tech review feedback * (DOCSP-8692): fix indentation
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‎config/redirects‎

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@@ -47,3 +47,6 @@ raw: kubernetes-operator/release-notes -> ${base}/stable/release-notes
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[*-v1.2]: kubernetes-operator/${version}/tutorial/secure-tls -> ${base}/${version}/deploy
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[*-v1.2]: kubernetes-operator/${version}/tutorial/secure-x509-auth -> ${base}/${version}/deploy
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[*-v1.2]: kubernetes-operator/${version}/tutorial/secure-internal-auth -> ${base}/${version}/deploy
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# v1.3 and earlier
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[*-v1.3]: kubernetes-operator/${version}/tutorial/plan-k8s-operator-install -> ${base}/${version}/tutorial/install-k8s-operator

‎source/includes/admonitions/fact-create-service-account-namespaces.rst‎

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.. important::
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You must create a service account
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``mongodb-enterprise-database-pods`` in each namespace the
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|k8s-op-short| watches other than the default to create
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|k8s-mdbrsc| in these namespaces:
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.. code-block:: sh
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kubectl create serviceaccount mongodb-enterprise-database-pods -n <namespace>
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To watch |onprem| and |k8s-mdbrscs| in a different |k8s-ns| to which
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you deploy the |k8s-op-short|, see :ref:`k8s-deployment-scopes` for
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values you must use and additional steps you might have to perform.
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‎source/includes/list-tables/k8s-kubectl-install-options.rst‎

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Default value is: ``<metadata.namespace>``.
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.. include:: /includes/admonitions/fact-create-service-account-namespaces.rst
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.. admonition:: One Namespace or All Namespaces
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:class: note
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If you need to watch more than one namespace, set the value
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of ``WATCH_NAMESPACE`` to ``*`` (all). This environment
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variable can watch one namespace or all namespaces.
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.. include:: /includes/admonitions/fact-create-service-account-namespaces.rst
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You can set the following pair of values:
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‎source/includes/list-tables/k8s-oc-install-options.rst‎

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Default value is: ``<metadata.namespace>``.
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.. admonition:: One Namespace or All Namespaces
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:class: note
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If you need to watch more than one namespace, set the value
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of ``WATCH_NAMESPACE`` to ``*`` (all). This environment
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variable can watch one namespace or all namespaces.
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.. include:: /includes/admonitions/fact-create-service-account-namespaces.rst
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You can set the following pair of values:

‎source/installation.txt‎

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:depth: 1
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:class: singlecol
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:ref:`plan-k8s-operator-install`
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Review |k8s-op-short| deployment scopes, considerations, and
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prerequisites.
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:ref:`install-k8s`
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Install the |k8s-op-full|.
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.. toctree::
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:titlesonly:
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/tutorial/plan-k8s-operator-install
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/tutorial/install-k8s-operator
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/upgrade

‎source/tutorial/install-k8s-operator.txt‎

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.. include:: /includes/styles/corrections.rst
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Use the |k8s-op-full| to deploy:
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Prerequisites and Considerations
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--------------------------------
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- Ops Manager resources
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- MongoDB standalone, replica set, and sharded cluster resources
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Before you install the |k8s-op-short|, make sure you
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:ref:`plan for your installation <plan-k8s-operator-install>`:
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.. include:: /includes/admonitions/note-k8s-supported-in-om4.rst
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To deploy MongoDB resources with the |k8s-op-short|, you need an
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|onprem| instance. Deploy this instance to |k8s| using the Operator or
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outside |k8s| using
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:opsmgr:`traditional installation methods </installation>`. The
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Operator uses |onprem| |api| methods to deploy then manage MongoDB
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resources.
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- Choose a :ref:`deployment topology <k8s-deployment-scopes>`.
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- Read the :ref:`Considerations <k8s-considerations>`.
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- Complete the :ref:`Prerequisites <k8s-prerequisites>`.
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.. note::
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This tutorial presumes some knowledge of |k8s|, but does link to
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relevant |k8s| documentation where possible. If you are unfamiliar
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with |k8s|, please review that documentation first.
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.. _k8s-prerequisites:
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Prerequisites
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-------------
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.. include:: /includes/install/install-prereqs.rst
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Considerations
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--------------
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|k8s| Compatibility
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~~~~~~~~~~~~~~~~~~~
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|k8s-op-full| is compatible with |k8s| v1.13 or later.
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Docker Container Details
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~~~~~~~~~~~~~~~~~~~~~~~~
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MongoDB builds the container images from the latest builds of the
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following operating systems:
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.. list-table::
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:header-rows: 1
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:widths: 50 50
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* - If you get your |k8s-op-short| from...
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- ...the Container uses
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* - `quay.io <https://quay.io/repository/mongodb/mongodb-enterprise-operator?tag=latest&tab=tags>`__
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or :gh:`GitHub </mongodb/mongodb-enterprise-kubernetes>`
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- `Ubuntu 16.04 <https://www.ubuntu.com/containers>`__
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* - `OpenShift <https://access.redhat.com/containers/?tab=tags#/registry.connect.redhat.com/mongodb/enterprise-operator>`__
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- `Red Hat Enterprise Linux 7 <https://www.redhat.com/en/topics/containers>`__
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MongoDB, Inc. updates all packages on these images before releasing
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them every three weeks.
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Only One Operator per Namespace
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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The |k8s-op-full| can only exist in one |k8s-ns|. Your deployment can
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have:
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- One cluster-wide |k8s-op-short| or
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- Multiple Kubernetes Operators in their own namespaces
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Do not try to deploy more than one Kubernetes Operator in the same
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namespace as another Operator. Multiple Operators cannot coordinate
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with one another within the same namespace.
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.. _default namespace: https://kubernetes.io/docs/concepts/overview/working-with-objects/namespaces/#viewing-namespaces
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.. _install-k8s-operator:
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Install the |k8s-op-full|
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-------------------------
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Procedure
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---------
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The following steps vary depending on how you want to configure your
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environment:
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.. tabs::
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‎source/tutorial/plan-k8s-operator-install.txt‎

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.. _plan-k8s-operator-install:
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====================================
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Plan your |k8s-op-full| Installation
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====================================
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.. default-domain:: mongodb
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.. contents:: On this page
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:local:
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:backlinks: none
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:depth: 1
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:class: singlecol
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.. include:: /includes/styles/corrections.rst
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Use the |k8s-op-full| to deploy:
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- Ops Manager resources
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- MongoDB standalone, replica set, and sharded cluster resources
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.. include:: /includes/admonitions/note-k8s-supported-in-om4.rst
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To deploy MongoDB resources with the |k8s-op-short|, you need an
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|onprem| instance. Deploy this instance to |k8s| using the Operator or
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outside |k8s| using
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:opsmgr:`traditional installation methods </installation>`. The
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Operator uses |onprem| |api| methods to deploy then manage MongoDB
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resources.
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.. _k8s-considerations:
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Considerations
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--------------
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|k8s| Compatibility
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~~~~~~~~~~~~~~~~~~~
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|k8s-op-full| is compatible with |k8s| v1.13 or later.
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Docker Container Details
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~~~~~~~~~~~~~~~~~~~~~~~~
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MongoDB builds the container images from the latest builds of the
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following operating systems:
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.. list-table::
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:header-rows: 1
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:widths: 50 50
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* - If you get your |k8s-op-short| from...
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- ...the Container uses
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* - `quay.io <https://quay.io/repository/mongodb/mongodb-enterprise-operator?tag=latest&tab=tags>`__
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or :gh:`GitHub </mongodb/mongodb-enterprise-kubernetes>`
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- `Ubuntu 16.04 <https://www.ubuntu.com/containers>`__
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* - `OpenShift <https://access.redhat.com/containers/?tab=tags#/registry.connect.redhat.com/mongodb/enterprise-operator>`__
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- `Red Hat Enterprise Linux 7 <https://www.redhat.com/en/topics/containers>`__
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MongoDB, Inc. updates all packages on these images before releasing
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them every three weeks.
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.. _k8s-deployment-scopes:
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|k8s-op-short| Deployment Scopes
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--------------------------------
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You can deploy the |k8s-op-short| with different scopes based on where
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you want to deploy |onprem| and |k8s-mdbrscs| resources:
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- :ref:`ns-scope-same-ns` *(Default)*
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- :ref:`ns-scope-different-ns`
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- :ref:`cluster-wide-scope`
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.. _ns-scope-same-ns:
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Operator in Same Namespace as Resources
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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You scope the |k8s-op-short| to a namespace. The |k8s-op-short| watches
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|onprem| and |k8s-mdbrscs| in that same |k8s-ns|.
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This is the default scope when you install the |k8s-op-short| using the
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:ref:`installation instructions <install-k8s-operator>`.
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.. _ns-scope-different-ns:
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Operator in Different Namespace Than Resources
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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You scope the |k8s-op-short| to a namespace. The |k8s-op-short| watches
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|onprem| and |k8s-mdbrscs| in the |k8s-ns| you specify.
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You must use ``helm`` to install the |k8s-op-short| with this scope.
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Follow the relevant ``helm`` :ref:`installation instructions <install-k8s-operator>`,
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but use the following command to set the namespace for the
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|k8s-op-short| to watch:
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.. code-block:: sh
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helm template --set operator.watchNamespace=<namespace> \
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helm_chart | kubectl apply -f -
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Setting the namespace ensures that:
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- The namespace you want the |k8s-op-short| to watch has the correct
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roles and role bindings.
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- The |k8s-op-short| can watch and create resources in the namespace.
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.. _cluster-wide-scope:
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Cluster-Wide Scope
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~~~~~~~~~~~~~~~~~~
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You scope the |k8s-op-short| to a cluster. The |k8s-op-short| watches
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|onprem| and |k8s-mdbrscs| in all |k8s-nss| in the |k8s| cluster.
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.. important::
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You can deploy only one Operator with a cluster-wide scope per |k8s|
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cluster.
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You must use ``helm`` to install the |k8s-op-short| with this scope.
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Follow the relevant ``helm`` :ref:`installation instructions <install-k8s-operator>`,
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but make the following adjustments:
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1. Use the following command to set the |k8s-op-short| to watch all
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namespaces:
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.. code-block:: sh
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helm template --set operator.watchNamespace=* \
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helm_chart | kubectl apply -f -
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2. Create the required service accounts for each namespace where you
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want to deploy |onprem| and |k8s-mdbrscs|:
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.. code-block:: sh
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helm template --set namespace=<namespace> \
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helm_chart -x templates/database-roles.yaml | kubectl apply -f -
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.. _k8s-prerequisites:
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Prerequisites
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-------------
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.. include:: /includes/install/install-prereqs.rst
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