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Ansible Keycloak Role

This role is designed to deploy Keycloak on a systemd managed system for testing and development purposes. The role will install Keycloak from an official downloaded Keycloak zip archive on the target system.

The Keycloak server will be configured as a systemd service named keycloak, running as a keycloak system user. The role will handle the creation of the system user and the service.

This role also handles some of the initial Keycloak server configuration. This includes configuring what ports to listen on, creating an initial admin user, and configuring TLS via self-signed or provided certificates. Firewall configuration is also handled.

Usage

Choose a playbook for whichever TLS scenario you are interested in. The following example playbooks are included in this repo:

  • tls-self-signed.yml - TLS via auto-generated self-signed certificate
  • tls-cert-key.yml - TLS via provided cert/key files
  • tls-pkcs12.yml - TLS via provided PKCS12 bundle

All of the example playbooks use ansible-vault for security sensitive variables. The examples use password for all secrets, including the vault password itself. New secrets should be generated and updated in the playbooks to avoid using the hard-coded example. Instructions for doing this are in comments in the example playbooks.

To execute your chosen playbook, be sure to add the --ask-vault-pass option as in this example:

ansible-playbook --ask-vault-pass -i <inventory/host list> <playbook>

If a deployment of the same version of Keycloak exists on the target system, the playbook will fail to prevent losing data within Keycloak's database. A force variable can be set to overwrite the existing deployment. This can be either be set as a variable in the playbook, or added on the command line as an extra-var:

ansible-playbook ... --extra-vars "keycloak_force_install=yes"

Controlling the location of the Keycloak archive

By default the Keycloak archive will be downloaded to the local system where the playbook is being run from. It will reside in the directory specified by the variable keycloak_local_download_dest. When the archive is extracted on the target system the archive will be read on the local system and the files created on the destination target. This behavior has the advantage of downloading the archive only once and not storing the archive on the target but it incurs a network penalty of transferring the archive contents again for every target during the extraction process. If you have a slow upload network link on the host running the playbook the non-local extraction may be untenable.

Alternately you have the option to download the archive directly to the target and extract the archive on the target, this is controlled by the keycloak_archive_on_target variable. This has the advantage of transferring the archive data only once. The archive extraction will be fast because there is no network traffic during the extraction because all data is local to the target. However it will leave the archive on the target after extraction.

To change the location of the archive on the command line add this argument to your playbook command line:

-e "{keycloak_archive_on_target: True}"

Variables

You can choose what version of Keycloak to install by setting the following variable. This will be used to determine the download URL to use from https://www.keycloak.org/downloads.html:

  • keycloak_version (default: 4.8.2.Final)

The following variable always needs to be provided, as the role does not hardcode a default:

  • keycloak_admin_password (use ansible-vault to protect)

You can choose a non-default admin account name by setting the following variable:

  • keycloak_admin_user (default: admin)

To configure the interface and ports that the Keycloak server listens on, the following variables can be set:

  • keycloak_bind_address (default: 0.0.0.0)
  • keycloak_http_port (default: 8080)
  • keycloak_https_port (default: 8443)

For TLS via PKCS12 bundle, the following additional variables must be provided:

  • keycloak_tls_pkcs12 (path to PKCS12 bundle)
  • keycloak_tls_pkcs12_passphrase (use ansible-vault to protect)
  • keycloak_tls_pkcs12_alias (name of key/cert in keycloak_tls_pkcs12)

For TLS via key/cert files, the following additional variables must be provided:

  • keycloak_tls_cert (path to TLS server cert file)
  • keycloak_tls_key (path to TLS server key file)

NOTE: the source TLS files (keycloak_tls_pkcs12, keycloak_tls_cert, keycloak_tls_key) used to create the Keycloak keystore may reside either on the Ansible controller (i.e. local) or on the remote target host. By default the role assumes the source TLS files are local. If however the source TLS files are located on the remote target set the variable keycloak_tls_files_on_target to True.

You can control timeout values with the following variables:

keycloak_startup_timeout: Number of seconds to wait for Keycloak to start.

keycloak_jboss_config_connect_timeout: Number of milliseconds to wait for jboss configuration utilityto connect to wildfly server.

keycloak_jboss_config_command_timeout: Number of seconds to wait for jboss configuration utility to complete each command executed in configuration file

See roles/keycloak/defaults/main.yml for a list of other variable defaults that one may want to override.

Testing

In-tree tests are provided that use molecule to test the role against docker containers. These tests are designed to be used by CI, but they can also be run locally to test it out while developing.

Role name issue

WARNING: For in-tree testing the directory name must match the Ansible Galaxy role name

NOTE: In these examples it is assumed the repo has been cloned into ~/src/

Ansible expects a role to have a prescribed directory structure. For example if the role is named my_role Ansible will expect to find a directory named my_role in the ANSIBLE_ROLES_PATH with sub-directories similar to this:

my_role/
├── defaults
├── files
├── handlers
├── meta
├── tasks
├── templates
├── tests
└── vars

By convention most Galaxy roles are created in a git repo whose top level directory contains the above role sub-directories thus the directory created when cloning the git repo becomes the role name. Using the above example the git repo would be named my_role. However, most git repositories are not named identically as their Galaxy role name. If you try to run molecule test at top level of a git tree cloned with the default repo name you will get a role not found error like this:

ERROR! the role 'nkinder.keycloak' was not found in /home/$USER/src/ansible-keycloak/molecule/default/roles:/tmp/molecule/ansible-keycloak/default/roles:/home/$USER/src:/home/$USER/src/ansible-keycloak/molecule/default

The error appears to have been in '/home/$USER/src/ansible-keycloak/molecule/default/playbook.yml': line 6, column 7, but may
be elsewhere in the file depending on the exact syntax problem.

The offending line appears to be:

  roles:
    - role: nkinder.keycloak
      ^ here

The solution to this is simple, when cloning the git repo provide a directory name that matches the role name in the molecule/default/playbook.yml file.

To determine the role name molecule will use find it's definition in molecule/default/playbook.yml:

  roles:
    - role: nkinder.keycloak

Hence the role name molecule will use is nkinder.keycloak.

Thus to clone this repo do this:

$ cd ~/src
$ git clone git@github.com:nkinder/ansible-keycloak.git nkinder.keycloak

Of course if you're cloning from a github fork you'll need to adjust the repo URL accordingly.

You'll need to cd into the cloned git repo:

$ cd nkinder.keycloak

When you run molecule test from the top level directory of the git repo molecule will get the current working directory path and from that find the parent directory path, it will then set the ANSIBLE_ROLES_PATH to include the parent directory of the role repo. Thus when ansible runs it will find your role via the directory name of your git repo. For example:

ANSIBLE_ROLES_PATH: /tmp/molecule/ansible-keycloak/default/roles:/home/$USER/src

Because ansible is looking for a role named nkinder.keycloak it will search the directories listed in ANSIBLE_ROLES_PATH and utilize the files in finds in /home/$USER/src/nkinder.keycloak.

NOTE: molecule will stage some files in a temporary directory for the duration of a test run, this is the MOLECULE_EPHEMERAL_DIRECTORY and in our examples it is /tmp/molecule/ansible-keycloak/default, hence the first path in the above ANSIBLE_ROLES_PATH.

NOTE: git does not require the directory name of the top level directory in the repo match the name of the git repo. Even though the directory name of the cloned repo will be different than the repo name all git operations will work as expected because the repo URL is specified as a remote in .git/config.

Testing is best done by installing molecule in a virtualenv:

  $ virtualenv .venv
  $ source .venv/bin/activate
  $ pip install molecule docker

NOTE: You must name the virtualenv directory .venv because molecule expects this.

WARNING: If you had already cloned the repo under as the repo name instead of the role name you can rename the repo directory however if you had created .venv before the rename you must remove .venv and recreate it because the virtualenv will have embedded the old pathnames.

By default molecule uses docker to build and run test images. You will need docker installed and have the docker daemon running:

# To install the docker package
$ sudo dnf install docker

#To start the Docker service use:
$ sudo systemctl start docker

# Verify that Docker was correctly installed and is running by running
# the Docker hello-world image.

$ sudo docker run hello-world

# To optionally start the Docker daemon at boot
$ sudo systemctl enable docker

It is required to run the tests as a user who is authorized to run the docker command without using sudo. This is typically accomplished by adding your user to the 'docker' group on your system.

$ sudo groupadd docker
$ sudo gpasswd -a $USER docker
$ sudo systemctl restart docker

# Group membership is evaluated when you create a new login session.
# Unless you log out and back in again you'll need to use `newgrp`
# to add your `docker` group membership in the current login session.
$ newgrp docker

Additionally, there is a challenge around python-libselinux on platforms that use SELinux. If you are using a virtualenv, you need to make sure that the selinux python module is available in the virtualenv. Even if it is installed on your ansible controller host and the target host, some of the tasks that are delegated to the locahost will use the virtualenv. The selinux module can't be installed via pip. A workaround for this is to copy the entire selinux directory from your system site-packages location (/usr/lib64/$PY_VERSION/site-packages/selinux on x86_64) into the virtualenv site-packages directory. You will also need to copy the selinux.so binary from file from site-packages directory (it is not located inside the selinux directory). The name of the selunux.so varies between Python2 and Python3.

In Python2 the basename of the .so is _selinux.so, for Python 2.7 on x86_64 this would be this .so:

/usr/lib64/python2.7/site-packages/_selinux.so

In Python3 the basename of the .so appends cpython, the python version, the arch and the OS, for Python 3.7 on x86_64 it would look like this:

/usr/lib64/python3.7/site-packages/_selinux.cpython-37m-x86_64-linux-gnu.so

Once your virtualenv is properly set up, the tests can be run with these commands:

$ cd nkinder.keycloak # Your repo whose directory matches the Galaxy role name
$ molecule test

HINT: Adding --debug to the molecule command can aid in diagnosing problems as well as capturing the output in a log file, you might want to do this:

$ molecule --debug test 2>&1 | tee molecule.log

By default, the test target will be the latest centos image from Docker Hub. You can test against a different image/tag like so:

$ MOLECULE_DISTRO="fedora:28" molecule test`

TODO

  • Add example playbook that uses ansible-freeipa to create keycloak service and get cert
  • Add example playbook that creates realm/client using keycloak_client module
  • Add ability to configure IdM as an identity backend for keycloak via SSSD provider