How to use OpenStack with Juju
- Add an OpenStack cloud
- Add an OpenStack credential
- Create a Juju controller for OpenStack
There are two methods to define a cloud for Juju:
- an interactive prompt
- a pre-populated YAML file
Both methods make use of the
juju add-cloud command. You will need to supply a name you wish to call your cloud.
Assuming that you have a cloud admin init file available to you, load the variables into your environment. This will allow Juju to automatically detect values from common OpenStack environment variables:
The environment variables are:
OS_AUTH_URL: the cloud API endpoint URL (Keystone)
OS_CACERT: the file containing the cloud’s CA certificate (if needed/present). It is now common to install the
openstackCLI client via a snap. In this case the certificate should be found in
OS_REGION_NAME: the region name
Begin an interactive session by invoking the
add-cloud command without specifying a YAML file:
juju add-cloud --client
Here is an example user session specifying
openstack-cloud as the cloud name:
Cloud Types lxd maas manual openstack vsphere Select cloud type: openstack Enter a name for your openstack cloud: openstack-cloud Enter the API endpoint url for the cloud [https://x.x.x.x:5000/v3]: Enter the filename of the CA certificate to access OpenStack cloud (optional) [/home/ubuntu/cacert.pem]: Auth Types access-key userpass Select one or more auth types separated by commas: userpass Enter region [dev1]: Enter the API endpoint url for the region [use cloud api url]: Enter another region? (Y/n): n Successfully read CA Certificate from /home/ubuntu/test_certs/cacert.pem Cloud "openstack-cloud" successfully added to your local client.
It is possible to choose more than one authorisation method by separating the values with commas.
The manual method makes use of configuration files defined in YAML. To define a configuration file that mimics the parameters provided by the interactive example, use this:
clouds: mystack: type: openstack auth-types: [access-key,userpass] regions: dev1: endpoint: https://openstack.example.com:35574/v3.0/
Adding a cloud manually can be done locally or, since
v.2.6.0, remotely (on a controller). Here, we’ll show how to do it locally (client cache).
To add cloud ‘openstack-cloud’, assuming the configuration file is
openstack-cloud.yaml in the current directory, we would run:
juju add-cloud --local openstack-cloud openstack-cloud.yaml
See the Adding clouds manually page for further information.
Ask Juju to report the clouds that it has registered:
juju clouds --local
add-credential command to interactively add your credentials to the new cloud:
juju add-credential openstack-cloud
For more information about credentials, read through the Credentials page.
To view the credentials that Juju knows about, use the
credentials command and inspect both remote and locally stored credentials:
juju credentials juju credentials --local
You are now ready to create a Juju controller for
juju bootstrap openstack-cloud
This provisions an instance in your cloud and installs the Juju controller within it.
Some scenarios may require a more advanced configuration.
OpenStack requires access to images to provision instances. Configuring this correctly is covered on the Cloud image metadata page.
If your image metadata is available locally the
--metadata-source option is available to you.
juju bootstrap <cloud> <controller name> \ --metadata-source /path/to/simplestream/images
For clouds that have multiple private networks you will need to specify the one that you want the instances to boot from:
juju bootstrap <cloud> <controller-name> \ --model-default network=<network-uuid-or-name>
OpenStack networks (public and private) can be listed with:
openstack network list
The cloud’s topology may require that its instances are accessed via floating IP addresses:
juju bootstrap <cloud> <controller-name> \ --bootstrap-constraints="allocate-public-ip=true"
Last updated 6 months ago.