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Diffstat (limited to 'playbooks/openstack/advanced-configuration.md')
| -rw-r--r-- | playbooks/openstack/advanced-configuration.md | 127 |
1 files changed, 116 insertions, 11 deletions
diff --git a/playbooks/openstack/advanced-configuration.md b/playbooks/openstack/advanced-configuration.md index 2c9b70b5f..e8f4cfc32 100644 --- a/playbooks/openstack/advanced-configuration.md +++ b/playbooks/openstack/advanced-configuration.md @@ -1,9 +1,8 @@ ## Dependencies for localhost (ansible control/admin node) -* [Ansible 2.3](https://pypi.python.org/pypi/ansible) -* [Ansible-galaxy](https://pypi.python.org/pypi/ansible-galaxy-local-deps) -* [jinja2](http://jinja.pocoo.org/docs/2.9/) -* [shade](https://pypi.python.org/pypi/shade) +* [Ansible](https://pypi.python.org/pypi/ansible) version >=2.4.0 +* [jinja2](http://jinja.pocoo.org/docs/2.9/) version >= 2.10 +* [shade](https://pypi.python.org/pypi/shade) version >= 1.26 * python-jmespath / [jmespath](https://pypi.python.org/pypi/jmespath) * python-dns / [dnspython](https://pypi.python.org/pypi/dnspython) * Become (sudo) is not required. @@ -133,7 +132,7 @@ You can also access the OpenShift cluster with a web browser by going to: https://master-0.openshift.example.com:8443 Note that for this to work, the OpenShift nodes must be accessible -from your computer and it's DNS configuration must use the cruster's +from your computer and its DNS configuration must use the cluster's DNS. @@ -153,7 +152,7 @@ openstack stack delete --wait --yes openshift.example.com Pay special attention to the values in the first paragraph -- these will depend on your OpenStack environment. -Note that the provsisioning playbooks update the original Neutron subnet +Note that the provisioning playbooks update the original Neutron subnet created with the Heat stack to point to the configured DNS servers. So the provisioned cluster nodes will start using those natively as default nameservers. Technically, this allows to deploy OpenShift clusters @@ -162,7 +161,7 @@ without dnsmasq proxies. The `openshift_openstack_clusterid` and `openshift_openstack_public_dns_domain` will form the cluster's public DNS domain all your servers will be under. With the default values, this will be `openshift.example.com`. For workloads, the -default subdomain is 'apps'. That sudomain can be set as well by the +default subdomain is 'apps'. That subdomain can be set as well by the `openshift_openstack_app_subdomain` variable in the inventory. If you want to use a two sets of hostnames for public and private/prefixed DNS @@ -334,7 +333,7 @@ or your trusted network. The most important is the `openshift_openstack_node_ing that restricts public access to the deployed DNS server and cluster nodes' ephemeral ports range. -Note, the command ``curl https://api.ipify.org`` helps fiding an external +Note, the command ``curl https://api.ipify.org`` helps finding an external IP address of your box (the ansible admin node). There is also the `manage_packages` variable (defaults to True) you @@ -372,6 +371,112 @@ In order to set a custom entrypoint, update `openshift_master_cluster_public_hos Note than an empty hostname does not work, so if your domain is `openshift.example.com`, you cannot set this value to simply `openshift.example.com`. + +## Using Cinder-backed Persistent Volumes + +You will need to set up OpenStack credentials. You can try putting this in your +`inventory/group_vars/OSEv3.yml`: + + openshift_cloudprovider_kind: openstack + openshift_cloudprovider_openstack_auth_url: "{{ lookup('env','OS_AUTH_URL') }}" + openshift_cloudprovider_openstack_username: "{{ lookup('env','OS_USERNAME') }}" + openshift_cloudprovider_openstack_password: "{{ lookup('env','OS_PASSWORD') }}" + openshift_cloudprovider_openstack_tenant_name: "{{ lookup('env','OS_PROJECT_NAME') }}" + openshift_cloudprovider_openstack_domain_name: "{{ lookup('env','OS_USER_DOMAIN_NAME') }}" + openshift_cloudprovider_openstack_blockstorage_version: v2 + +**NOTE**: you must specify the Block Storage version as v2, because OpenShift +does not support the v3 API yet and the version detection is currently not +working properly. + +For more information, consult the [Configuring for OpenStack page in the OpenShift documentation][openstack-credentials]. + +[openstack-credentials]: https://docs.openshift.org/latest/install_config/configuring_openstack.html#install-config-configuring-openstack + +**NOTE** the OpenStack integration currently requires DNS to be configured and +running and the `openshift_hostname` variable must match the Nova server name +for each node. The cluster deployment will fail without it. If you use the +provided OpenStack dynamic inventory and configure the +`openshift_openstack_dns_nameservers` Ansible variable, this will be handled +for you. + +After a successful deployment, the cluster is configured for Cinder persistent +volumes. + +### Validation + +1. Log in and create a new project (with `oc login` and `oc new-project`) +2. Create a file called `cinder-claim.yaml` with the following contents: + +```yaml +apiVersion: "v1" +kind: "PersistentVolumeClaim" +metadata: + name: "claim1" +spec: + accessModes: + - "ReadWriteOnce" + resources: + requests: + storage: "1Gi" +``` +3. Run `oc create -f cinder-claim.yaml` to create the Persistent Volume Claim object in OpenShift +4. Run `oc describe pvc claim1` to verify that the claim was created and its Status is `Bound` +5. Run `openstack volume list` + * A new volume called `kubernetes-dynamic-pvc-UUID` should be created + * Its size should be `1` + * It should not be attached to any server +6. Create a file called `mysql-pod.yaml` with the following contents: + +```yaml +apiVersion: v1 +kind: Pod +metadata: + name: mysql + labels: + name: mysql +spec: + containers: + - resources: + limits : + cpu: 0.5 + image: openshift/mysql-55-centos7 + name: mysql + env: + - name: MYSQL_ROOT_PASSWORD + value: yourpassword + - name: MYSQL_USER + value: wp_user + - name: MYSQL_PASSWORD + value: wp_pass + - name: MYSQL_DATABASE + value: wp_db + ports: + - containerPort: 3306 + name: mysql + volumeMounts: + - name: mysql-persistent-storage + mountPath: /var/lib/mysql/data + volumes: + - name: mysql-persistent-storage + persistentVolumeClaim: + claimName: claim1 +``` + +7. Run `oc create -f mysql-pod.yaml` to create the pod +8. Run `oc describe pod mysql` + * Its events should show that the pod has successfully attached the volume above + * It should show no errors + * `openstack volume list` should show the volume attached to an OpenShift app node + * NOTE: this can take several seconds +9. After a while, `oc get pod` should show the `mysql` pod as running +10. Run `oc delete pod mysql` to remove the pod + * The Cinder volume should no longer be attached +11. Run `oc delete pvc claim1` to remove the volume claim + * The Cinder volume should be deleted + + + ## Creating and using a Cinder volume for the OpenShift registry You can optionally have the playbooks create a Cinder volume and set @@ -415,7 +520,7 @@ OpenStack)[openstack] for more information. [openstack]: https://docs.openshift.org/latest/install_config/configuring_openstack.html -Next, we need to instruct OpenShift to use the Cinder volume for it's +Next, we need to instruct OpenShift to use the Cinder volume for its registry. Again in `OSEv3.yml`: #openshift_hosted_registry_storage_kind: openstack @@ -470,12 +575,12 @@ The **Cinder volume ID**, **filesystem** and **volume size** variables must correspond to the values in your volume. The volume ID must be the **UUID** of the Cinder volume, *not its name*. -We can do formate the volume for you if you ask for it in +The volume can also be formatted if you configure it in `inventory/group_vars/all.yml`: openshift_openstack_prepare_and_format_registry_volume: true -**NOTE:** doing so **will destroy any data that's currently on the volume**! +**NOTE:** Formatting **will destroy any data that's currently on the volume**! You can also run the registry setup playbook directly: |