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diff --git a/playbooks/openstack/advanced-configuration.md b/playbooks/openstack/advanced-configuration.md new file mode 100644 index 000000000..db2a13d38 --- /dev/null +++ b/playbooks/openstack/advanced-configuration.md @@ -0,0 +1,630 @@ +## 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) +* python-jmespath / [jmespath](https://pypi.python.org/pypi/jmespath) +* python-dns / [dnspython](https://pypi.python.org/pypi/dnspython) +* Become (sudo) is not required. + +**NOTE**: You can use a Docker image with all dependencies set up. +Find more in the [Deployment section](#deployment). + +### Optional Dependencies for localhost +**Note**: When using rhel images, `rhel-7-server-openstack-10-rpms` repository is required in order to install these packages. + +* `python-openstackclient` +* `python-heatclient` + +## Dependencies for OpenStack hosted cluster nodes (servers) + +There are no additional dependencies for the cluster nodes. Required +configuration steps are done by Heat given a specific user data config +that normally should not be changed. + +## Accessing the OpenShift Cluster + +### Configure DNS + +OpenShift requires a two public DNS records to function fully. The first one points to +the master/load balancer and provides the UI/API access. The other one is a +wildcard domain that resolves app route requests to the infra node. A private DNS +server and records are not required and not managed here. + +If you followed the default installation from the README section, there is no +DNS configured. You should add two entries to the `/etc/hosts` file on the +Ansible host (where you to do a quick validation. A real deployment will +however require a DNS server with the following entries set. + +First, run the `openstack server list` command and note the floating IP +addresses of the *master* and *infra* nodes (we will use `10.40.128.130` for +master and `10.40.128.134` for infra here). + +Then add the following entries to your `/etc/hosts`: + +``` +10.40.128.130 console.openshift.example.com +10.40.128.134 cakephp-mysql-example-test.apps.openshift.example.com +``` + +This points the cluster domain (as defined in the +`openshift_master_cluster_public_hostname` Ansible variable in `OSEv3`) to the +master node and any routes for deployed apps to the infra node. + +If you deploy another app, it will end up with a different URL (e.g. +myapp-test.apps.openshift.example.com) and you will need to add that too. This +is why a real deployment should always run a DNS where the second entry will be +a wildcard `*.apps.openshift.example.com). + +This will be sufficient to validate the cluster here. + +Take a look at the [External DNS](#dns-configuration-variables) section for +configuring a DNS service. + + +### Get the `oc` Client + +**NOTE**: You can skip this section if you're using the Docker image +-- it already has the `oc` binary. + +You need to download the OpenShift command line client (called `oc`). +You can download and extract `openshift-origin-client-tools` from the +OpenShift release page: + +https://github.com/openshift/origin/releases/latest/ + +Or you can now copy it from the master node: + + $ ansible -i inventory masters[0] -m fetch -a "src=/bin/oc dest=oc" + +Either way, find the `oc` binary and put it in your `PATH`. + + +### Logging in Using the Command Line + + +``` +oc login --insecure-skip-tls-verify=true https://master-0.openshift.example.com:8443 -u user -p password +oc new-project test +oc new-app --template=cakephp-mysql-example +oc status -v +curl http://cakephp-mysql-example-test.apps.openshift.example.com +``` + +This will trigger an image build. You can run `oc logs -f +bc/cakephp-mysql-example` to follow its progress. + +Wait until the build has finished and both pods are deployed and running: + +``` +$ oc status -v +In project test on server https://master-0.openshift.example.com:8443 + +http://cakephp-mysql-example-test.apps.openshift.example.com (svc/cakephp-mysql-example) + dc/cakephp-mysql-example deploys istag/cakephp-mysql-example:latest <- + bc/cakephp-mysql-example source builds https://github.com/openshift/cakephp-ex.git on openshift/php:7.0 + deployment #1 deployed about a minute ago - 1 pod + +svc/mysql - 172.30.144.36:3306 + dc/mysql deploys openshift/mysql:5.7 + deployment #1 deployed 3 minutes ago - 1 pod + +Info: + * pod/cakephp-mysql-example-1-build has no liveness probe to verify pods are still running. + try: oc set probe pod/cakephp-mysql-example-1-build --liveness ... +View details with 'oc describe <resource>/<name>' or list everything with 'oc get all'. + +``` + +You can now look at the deployed app using its route: + +``` +$ curl http://cakephp-mysql-example-test.apps.openshift.example.com +``` + +Its `title` should say: "Welcome to OpenShift". + + +### Accessing the UI + +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 +DNS. + + +## Removing the OpenShift Cluster + +Everything in the cluster is contained within a Heat stack. To +completely remove the cluster and all the related OpenStack resources, +run this command: + +```bash +openstack stack delete --wait --yes openshift.example.com +``` + + +## DNS configuration variables + +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 +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 +without dnsmasq proxies. + +The `openshift_openstack_clusterid` and `openshift_openstack_public_dns_domain` will form the cluster's 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 `openshift_openstack_app_subdomain` variable in +the inventory. + +The `openstack_<role name>_hostname` is a set of variables used for customising +public names of Nova servers provisioned with a given role. When such a variable stays commented, +default value (usually the role name) is used. + +The `openshift_openstack_dns_nameservers` is a list of DNS servers accessible from all +the created Nova servers. These will provide the internal name resolution for +your OpenShift nodes (as well as upstream name resolution for installing +packages, etc.). + +The `openshift_use_dnsmasq` controls either dnsmasq is deployed or not. +By default, dnsmasq is deployed and comes as the hosts' /etc/resolv.conf file +first nameserver entry that points to the local host instance of the dnsmasq +daemon that in turn proxies DNS requests to the authoritative DNS server. +When Network Manager is enabled for provisioned cluster nodes, which is +normally the case, you should not change the defaults and always deploy dnsmasq. + +`openshift_openstack_external_nsupdate_keys` describes an external authoritative DNS server(s) +processing dynamic records updates in the public only cluster view: + + openshift_openstack_external_nsupdate_keys: + public: + key_secret: <some nsupdate key> + key_algorithm: 'hmac-md5' + key_name: 'update-key' + server: <public DNS server IP> + +Here, for the public view section, we specified another key algorithm and +optional `key_name`, which normally defaults to the cluster's DNS domain. +This just illustrates a compatibility mode with a DNS service deployed +by OpenShift on OSP10 reference architecture, and used in a mixed mode with +another external DNS server. + +## Flannel networking + +In order to configure the +[flannel networking](https://docs.openshift.com/container-platform/3.6/install_config/configuring_sdn.html#using-flannel), +uncomment and adjust the appropriate `inventory/group_vars/OSEv3.yml` group vars. +Note that the `osm_cluster_network_cidr` must not overlap with the default +Docker bridge subnet of 172.17.0.0/16. Or you should change the docker0 default +CIDR range otherwise. For example, by adding `--bip=192.168.2.1/24` to +`DOCKER_NETWORK_OPTIONS` located in `/etc/sysconfig/docker-network`. + +Also note that the flannel network will be provisioned on a separate isolated Neutron +subnet defined from `osm_cluster_network_cidr` and having ports security disabled. +Use the `openstack_private_data_network_name` variable to define the network +name for the heat stack resource. + +After the cluster deployment done, you should run an additional post installation +step for flannel and docker iptables configuration: + + ansible-playbook openshift-ansible-contrib/playbooks/provisioning/openstack/post-install.yml + +## Other configuration variables + +`openshift_openstack_keypair_name` is a Nova keypair - you can see your +keypairs with `openstack keypair list`. It must correspond to the +private SSH key Ansible will use to log into the created VMs. This is +`~/.ssh/id_rsa` by default, but you can use a different key by passing +`--private-key` to `ansible-playbook`. + +`openshift_openstack_default_image_name` is the default name of the Glance image the +servers will use. You can see your images with `openstack image list`. +In order to set a different image for a role, uncomment the line with the +corresponding variable (e.g. `openshift_openstack_lb_image_name` for load balancer) and +set its value to another available image name. `openshift_openstack_default_image_name` +must stay defined as it is used as a default value for the rest of the roles. + +`openshift_openstack_default_flavor` is the default Nova flavor the servers will use. +You can see your flavors with `openstack flavor list`. +In order to set a different flavor for a role, uncomment the line with the +corresponding variable (e.g. `openshift_openstack_lb_flavor` for load balancer) and +set its value to another available flavor. `openshift_openstack_default_flavor` must +stay defined as it is used as a default value for the rest of the roles. + +`openshift_openstack_external_network_name` is the name of the Neutron network +providing external connectivity. It is often called `public`, +`external` or `ext-net`. You can see your networks with `openstack +network list`. + +`openshift_openstack_private_network_name` is the name of the private Neutron network +providing admin/control access for ansible. It can be merged with other +cluster networks, there are no special requirements for networking. + +The `openshift_openstack_num_masters`, `openshift_openstack_num_infra` and +`openshift_openstack_num_nodes` values specify the number of Master, Infra and +App nodes to create. + +The `openshift_openstack_cluster_node_labels` defines custom labels for your openshift +cluster node groups. It currently supports app and infra node groups. +The default value of this variable sets `region: primary` to app nodes and +`region: infra` to infra nodes. +An example of setting a customised label: +``` +openshift_openstack_cluster_node_labels: + app: + mylabel: myvalue +``` + +The `openshift_openstack_nodes_to_remove` allows you to specify the numerical indexes +of App nodes that should be removed; for example, ['0', '2'], + +The `docker_volume_size` is the default Docker volume size the servers will use. +In order to set a different volume size for a role, +uncomment the line with the corresponding variable (e. g. `docker_master_volume_size` +for master) and change its value. `docker_volume_size` must stay defined as it is +used as a default value for some of the servers (master, infra, app node). +The rest of the roles (etcd, load balancer, dns) have their defaults hard-coded. + +**Note**: If the `openshift_openstack_ephemeral_volumes` is set to `true`, the `*_volume_size` variables +will be ignored and the deployment will not create any cinder volumes. + +The `openshift_openstack_flat_secgrp`, controls Neutron security groups creation for Heat +stacks. Set it to true, if you experience issues with sec group rules +quotas. It trades security for number of rules, by sharing the same set +of firewall rules for master, node, etcd and infra nodes. + +The `openshift_openstack_required_packages` variable also provides a list of the additional +prerequisite packages to be installed before to deploy an OpenShift cluster. +Those are ignored though, if the `manage_packages: False`. + +## Multi-master configuration + +Please refer to the official documentation for the +[multi-master setup](https://docs.openshift.com/container-platform/3.6/install_config/install/advanced_install.html#multiple-masters) +and define the corresponding [inventory +variables](https://docs.openshift.com/container-platform/3.6/install_config/install/advanced_install.html#configuring-cluster-variables) +in `inventory/group_vars/OSEv3.yml`. For example, given a load balancer node +under the ansible group named `ext_lb`: + + openshift_master_cluster_hostname: "{{ groups.ext_lb.0 }}" + openshift_master_cluster_public_hostname: "{{ groups.ext_lb.0 }}" + +## Provider Network + +Normally, the playbooks create a new Neutron network and subnet and attach +floating IP addresses to each node. If you have a provider network set up, this +is all unnecessary as you can just access servers that are placed in the +provider network directly. + +To use a provider network, set its name in `openshift_openstack_provider_network_name` in +`inventory/group_vars/all.yml`. + +If you set the provider network name, the `openshift_openstack_external_network_name` and +`openshift_openstack_private_network_name` fields will be ignored. + +**NOTE**: this will not update the nodes' DNS, so running openshift-ansible +right after provisioning will fail (unless you're using an external DNS server +your provider network knows about). You must make sure your nodes are able to +resolve each other by name. + +## Security notes + +Configure required `*_ingress_cidr` variables to restrict public access +to provisioned servers from your laptop (a /32 notation should be used) +or your trusted network. The most important is the `openshift_openstack_node_ingress_cidr` +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 +IP address of your box (the ansible admin node). + +There is also the `manage_packages` variable (defaults to True) you +may want to turn off in order to speed up the provisioning tasks. This may +be the case for development environments. When turned off, the servers will +be provisioned omitting the ``yum update`` command. This brings security +implications though, and is not recommended for production deployments. + +## Configure the OpenShift parameters + +Finally, you need to update the DNS entry in +`inventory/group_vars/OSEv3.yml` (look at +`openshift_master_default_subdomain`). + +In addition, this is the place where you can customise your OpenShift +installation for example by specifying the authentication. + +The full list of options is available in this sample inventory: + +https://github.com/openshift/openshift-ansible/blob/master/inventory/byo/hosts.ose.example + +Note, that in order to deploy OpenShift origin, you should update the following +variables for the `inventory/group_vars/OSEv3.yml`, `all.yml`: + + deployment_type: origin + openshift_deployment_type: "{{ deployment_type }}" + + +## Setting a custom entrypoint + +In order to set a custom entrypoint, update `openshift_master_cluster_public_hostname` + + openshift_master_cluster_public_hostname: api.openshift.example.com + +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`. + +## Creating and using a Cinder volume for the OpenShift registry + +You can optionally have the playbooks create a Cinder volume and set +it up as the OpenShift hosted registry. + +To do that you need specify the desired Cinder volume name and size in +Gigabytes in `inventory/group_vars/all.yml`: + + openshift_openstack_cinder_hosted_registry_name: cinder-registry + openshift_openstack_cinder_hosted_registry_size_gb: 10 + +With this, the playbooks will create the volume and set up its +filesystem. If there is an existing volume of the same name, we will +use it but keep the existing data on it. + +To use the volume for the registry, you must first configure it with +the OpenStack credentials by putting the following to `OSEv3.yml`: + + openshift_cloudprovider_openstack_username: "{{ lookup('env','OS_USERNAME') }}" + openshift_cloudprovider_openstack_password: "{{ lookup('env','OS_PASSWORD') }}" + openshift_cloudprovider_openstack_auth_url: "{{ lookup('env','OS_AUTH_URL') }}" + openshift_cloudprovider_openstack_tenant_name: "{{ lookup('env','OS_TENANT_NAME') }}" + +This will use the credentials from your shell environment. If you want +to enter them explicitly, you can. You can also use credentials +different from the provisioning ones (say for quota or access control +reasons). + +**NOTE**: If you're testing this on (DevStack)[devstack], you must +explicitly set your Keystone API version to v2 (e.g. +`OS_AUTH_URL=http://10.34.37.47/identity/v2.0`) instead of the default +value provided by `openrc`. You may also encounter the following issue +with Cinder: + +https://github.com/kubernetes/kubernetes/issues/50461 + +You can read the (OpenShift documentation on configuring +OpenStack)[openstack] for more information. + +[devstack]: https://docs.openstack.org/devstack/latest/ +[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 +registry. Again in `OSEv3.yml`: + + #openshift_hosted_registry_storage_kind: openstack + #openshift_hosted_registry_storage_access_modes: ['ReadWriteOnce'] + #openshift_hosted_registry_storage_openstack_filesystem: xfs + +The filesystem value here will be used in the initial formatting of +the volume. + +If you're using the dynamic inventory, you must uncomment these two values as +well: + + #openshift_hosted_registry_storage_openstack_volumeID: "{{ lookup('os_cinder', openshift_openstack_cinder_hosted_registry_name).id }}" + #openshift_hosted_registry_storage_volume_size: "{{ openshift_openstack_cinder_hosted_registry_size_gb }}Gi" + +But note that they use the `os_cinder` lookup plugin we provide, so you must +tell Ansible where to find it either in `ansible.cfg` (the one we provide is +configured properly) or by exporting the +`ANSIBLE_LOOKUP_PLUGINS=openshift-ansible-contrib/lookup_plugins` environment +variable. + + + +## Use an existing Cinder volume for the OpenShift registry + +You can also use a pre-existing Cinder volume for the storage of your +OpenShift registry. + +To do that, you need to have a Cinder volume. You can create one by +running: + + openstack volume create --size <volume size in gb> <volume name> + +The volume needs to have a file system created before you put it to +use. + +As with the automatically-created volume, you have to set up the +OpenStack credentials in `inventory/group_vars/OSEv3.yml` as well as +registry values: + + #openshift_hosted_registry_storage_kind: openstack + #openshift_hosted_registry_storage_access_modes: ['ReadWriteOnce'] + #openshift_hosted_registry_storage_openstack_filesystem: xfs + #openshift_hosted_registry_storage_openstack_volumeID: e0ba2d73-d2f9-4514-a3b2-a0ced507fa05 + #openshift_hosted_registry_storage_volume_size: 10Gi + +Note the `openshift_hosted_registry_storage_openstack_volumeID` and +`openshift_hosted_registry_storage_volume_size` values: these need to +be added in addition to the previous variables. + +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 +`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**! + +You can also run the registry setup playbook directly: + + ansible-playbook -i inventory playbooks/provisioning/openstack/prepare-and-format-cinder-volume.yaml + +(the provisioning phase must be completed, first) + + + +## Using Docker on the Ansible host + +If you don't want to worry about the dependencies, you can use the +[OpenStack Control Host image][control-host-image]. + +[control-host-image]: https://hub.docker.com/r/redhatcop/control-host-openstack/ + +It has all the dependencies installed, but you'll need to map your +code and credentials to it. Assuming your SSH keys live in `~/.ssh` +and everything else is in your current directory (i.e. `ansible.cfg`, +`keystonerc`, `inventory`, `openshift-ansible`, +`openshift-ansible-contrib`), this is how you run the deployment: + + sudo docker run -it -v ~/.ssh:/mnt/.ssh:Z \ + -v $PWD:/root/openshift:Z \ + -v $PWD/keystonerc:/root/.config/openstack/keystonerc.sh:Z \ + redhatcop/control-host-openstack bash + +(feel free to replace `$PWD` with an actual path to your inventory and +checkouts, but note that relative paths don't work) + +The first run may take a few minutes while the image is being +downloaded. After that, you'll be inside the container and you can run +the playbooks: + + cd openshift + ansible-playbook openshift-ansible-contrib/playbooks/provisioning/openstack/provision.yaml + + +## Running Custom Post-Provision Actions + +A custom playbook can be run like this: + +``` +ansible-playbook --private-key ~/.ssh/openshift -i inventory/ openshift-ansible-contrib/playbooks/provisioning/openstack/custom-actions/custom-playbook.yml +``` + +If you'd like to limit the run to one particular host, you can do so as follows: + +``` +ansible-playbook --private-key ~/.ssh/openshift -i inventory/ openshift-ansible-contrib/playbooks/provisioning/openstack/custom-actions/custom-playbook.yml -l app-node-0.openshift.example.com +``` + +You can also create your own custom playbook. Here are a few examples: + +### Adding additional YUM repositories + +``` +--- +- hosts: app + tasks: + + # enable EPL + - name: Add repository + yum_repository: + name: epel + description: EPEL YUM repo + baseurl: https://download.fedoraproject.org/pub/epel/$releasever/$basearch/ +``` + +This example runs against app nodes. The list of options include: + + - cluster_hosts (all hosts: app, infra, masters, dns, lb) + - OSEv3 (app, infra, masters) + - app + - dns + - masters + - infra_hosts + +### Attaching additional RHN pools + +``` +--- +- hosts: cluster_hosts + tasks: + - name: Attach additional RHN pool + become: true + command: "/usr/bin/subscription-manager attach --pool=<pool ID>" + register: attach_rhn_pool_result + until: attach_rhn_pool_result.rc == 0 + retries: 10 + delay: 1 +``` + +This playbook runs against all cluster nodes. In order to help prevent slow connectivity +problems, the task is retried 10 times in case of initial failure. +Note that in order for this example to work in your deployment, your servers must use the RHEL image. + +### Adding extra Docker registry URLs + +This playbook is located in the [custom-actions](https://github.com/openshift/openshift-ansible-contrib/tree/master/playbooks/provisioning/openstack/custom-actions) directory. + +It adds URLs passed as arguments to the docker configuration program. +Going into more detail, the configuration program (which is in the YAML format) is loaded into an ansible variable +([lines 27-30](https://github.com/openshift/openshift-ansible-contrib/blob/master/playbooks/provisioning/openstack/custom-actions/add-docker-registry.yml#L27-L30)) +and in its structure, `registries` and `insecure_registries` sections are expanded with the newly added items +([lines 56-76](https://github.com/openshift/openshift-ansible-contrib/blob/master/playbooks/provisioning/openstack/custom-actions/add-docker-registry.yml#L56-L76)). +The new content is then saved into the original file +([lines 78-82](https://github.com/openshift/openshift-ansible-contrib/blob/master/playbooks/provisioning/openstack/custom-actions/add-docker-registry.yml#L78-L82)) +and docker is restarted. + +Example usage: +``` +ansible-playbook -i <inventory> openshift-ansible-contrib/playbooks/provisioning/openstack/custom-actions/add-docker-registry.yml --extra-vars '{"registries": "reg1", "insecure_registries": ["ins_reg1","ins_reg2"]}' +``` + +### Adding extra CAs to the trust chain + +This playbook is also located in the [custom-actions](https://github.com/openshift/openshift-ansible-contrib/blob/master/playbooks/provisioning/openstack/custom-actions) directory. +It copies passed CAs to the trust chain location and updates the trust chain on each selected host. + +Example usage: +``` +ansible-playbook -i <inventory> openshift-ansible-contrib/playbooks/provisioning/openstack/custom-actions/add-cas.yml --extra-vars '{"ca_files": [<absolute path to ca1 file>, <absolute path to ca2 file>]}' +``` + +Please consider contributing your custom playbook back to openshift-ansible-contrib! + +A library of custom post-provision actions exists in `openshift-ansible-contrib/playbooks/provisioning/openstack/custom-actions`. Playbooks include: + +* [add-yum-repos.yml](https://github.com/openshift/openshift-ansible-contrib/blob/master/playbooks/provisioning/openstack/custom-actions/add-yum-repos.yml): adds a list of custom yum repositories to every node in the cluster +* [add-rhn-pools.yml](https://github.com/openshift/openshift-ansible-contrib/blob/master/playbooks/provisioning/openstack/custom-actions/add-rhn-pools.yml): attaches a list of additional RHN pools to every node in the cluster +* [add-docker-registry.yml](https://github.com/openshift/openshift-ansible-contrib/blob/master/playbooks/provisioning/openstack/custom-actions/add-docker-registry.yml): adds a list of docker registries to the docker configuration on every node in the cluster +* [add-cas.yml](https://github.com/openshift/openshift-ansible-contrib/blob/master/playbooks/provisioning/openstack/custom-actions/add-rhn-pools.yml): adds a list of CAs to the trust chain on every node in the cluster + + +## Install OpenShift + +Once it succeeds, you can install openshift by running: + + ansible-playbook openshift-ansible/playbooks/byo/config.yml + +## Access UI + +OpenShift UI may be accessed via the 1st master node FQDN, port 8443. + +## Scale Deployment up/down + +### Scaling up + +One can scale up the number of application nodes by executing the ansible playbook +`openshift-ansible-contrib/playbooks/provisioning/openstack/scale-up.yaml`. +This process can be done even if there is currently no deployment available. +The `increment_by` variable is used to specify by how much the deployment should +be scaled up (if none exists, it serves as a target number of application nodes). +The path to `openshift-ansible` directory can be customised by the `openshift_ansible_dir` +variable. Its value must be an absolute path to `openshift-ansible` and it cannot +contain the '/' symbol at the end. + +Usage: + +``` +ansible-playbook -i <path to inventory> openshift-ansible-contrib/playbooks/provisioning/openstack/scale-up.yaml` [-e increment_by=<number>] [-e openshift_ansible_dir=<path to openshift-ansible>] +``` |