Galaxy User Guide

Ansible Galaxy refers to the Galaxy website, a free site for finding, downloading, and sharing community developed roles.

Use Galaxy to jump-start your automation project with great content from the Ansible community. Galaxy provides pre-packaged units of work such as roles, and new in Galaxy 3.2, collections You can find roles for provisioning infrastructure, deploying applications, and all of the tasks you do everyday. The collection format provides a comprehensive package of automation that may include multiple playbooks, roles, modules, and plugins.

Finding collections on Galaxy

To find collections on Galaxy:

  1. Click the Search icon in the left-hand navigation.

  2. Set the filter to collection.

  3. Set other filters and press enter.

Galaxy presents a list of collections that match your search criteria.

Installing collections

Installing a collection from Galaxy

By default, ansible-galaxy collection install uses https://galaxy.ansible.com as the Galaxy server (as listed in the ansible.cfg file under GALAXY_SERVER). You do not need any further configuration.

See Configuring the ansible-galaxy client if you are using any other Galaxy server, such as Red Hat Automation Hub.

To install a collection hosted in Galaxy:

ansible-galaxy collection install my_namespace.my_collection

To upgrade a collection to the latest available version from the Galaxy server you can use the --upgrade option:

ansible-galaxy collection install my_namespace.my_collection --upgrade

You can also directly use the tarball from your build:

ansible-galaxy collection install my_namespace-my_collection-1.0.0.tar.gz -p ./collections

You can build and install a collection from a local source directory. The ansible-galaxy utility builds the collection using the MANIFEST.json or galaxy.yml metadata in the directory.

ansible-galaxy collection install /path/to/collection -p ./collections

You can also install multiple collections in a namespace directory.

ns/
├── collection1/
│   ├── MANIFEST.json
│   └── plugins/
└── collection2/
    ├── galaxy.yml
    └── plugins/

ansible-galaxy collection install /path/to/ns -p ./collections

Note

The install command automatically appends the path ansible_collections to the one specified with the -p option unless the parent directory is already in a folder called ansible_collections.

When using the -p option to specify the install path, use one of the values configured in COLLECTIONS_PATHS, as this is where Ansible itself will expect to find collections. If you don’t specify a path, ansible-galaxy collection install installs the collection to the first path defined in COLLECTIONS_PATHS, which by default is ~/.ansible/collections

You can also keep a collection adjacent to the current playbook, under a collections/ansible_collections/ directory structure.

./
├── play.yml
├── collections/
│   └── ansible_collections/
│               └── my_namespace/
│                   └── my_collection/<collection structure lives here>

See Collection structure for details on the collection directory structure.

Downloading a collection from Automation Hub

You can download collections from Automation Hub at the command line. Automation Hub content is available to subscribers only, so you must download an API token and configure your local environment to provide it before you can you download collections. To download a collection from Automation Hub with the ansible-galaxy command:

  1. Get your Automation Hub API token. Go to https://cloud.redhat.com/ansible/automation-hub/token/ and click Load token from the version dropdown to copy your API token.

  2. Configure Red Hat Automation Hub server in the server_list option under the [galaxy] section in your ansible.cfg file.

[galaxy]
server_list = automation_hub

[galaxy_server.automation_hub]
url=https://console.redhat.com/api/automation-hub/
auth_url=https://sso.redhat.com/auth/realms/redhat-external/protocol/openid-connect/token
token=my_ah_token

  1. Download the collection hosted in Automation Hub.

ansible-galaxy collection install my_namespace.my_collection

See also

Getting started with Automation Hub

An introduction to Automation Hub

Installing an older version of a collection

You can only have one version of a collection installed at a time. By default ansible-galaxy installs the latest available version. If you want to install a specific version, you can add a version range identifier. For example, to install the 1.0.0-beta.1 version of the collection:

ansible-galaxy collection install my_namespace.my_collection:==1.0.0-beta.1

You can specify multiple range identifiers separated by ,. Use single quotes so the shell passes the entire command, including >, !, and other operators, along. For example, to install the most recent version that is greater than or equal to 1.0.0 and less than 2.0.0:

ansible-galaxy collection install 'my_namespace.my_collection:>=1.0.0,<2.0.0'

Ansible will always install the most recent version that meets the range identifiers you specify. You can use the following range identifiers:

  • *: The most recent version. This is the default.

  • !=: Not equal to the version specified.

  • ==: Exactly the version specified.

  • >=: Greater than or equal to the version specified.

  • >: Greater than the version specified.

  • <=: Less than or equal to the version specified.

  • <: Less than the version specified.

Note

By default ansible-galaxy ignores pre-release versions. To install a pre-release version, you must use the == range identifier to require it explicitly.

Install multiple collections with a requirements file

You can set up a requirements.yml file to install multiple collections in one command. This file is a YAML file in the format:

---
collections:
# With just the collection name
- my_namespace.my_collection

# With the collection name, version, and source options
- name: my_namespace.my_other_collection
  version: ">=1.2.0" # Version range identifiers (default: ``*``)
  source: ... # The Galaxy URL to pull the collection from (default: ``--api-server`` from cmdline)

You can specify the following keys for each collection entry:

  • name

  • version

  • signatures

  • source

  • type

The version key uses the same range identifier format documented in Installing an older version of a collection.

The signatures key accepts a list of signature sources that are used to supplement those found on the Galaxy server during collection installation and ansible-galaxy collection verify. Signature sources should be URIs that contain the detached signature. The --keyring CLI option must be provided if signatures are specified.

Signatures are only used to verify collections on Galaxy servers. User-provided signatures are not used to verify collections installed from git repositories, source directories, or URLs/paths to tar.gz files.

collections:
  - name: namespace.name
    version: 1.0.0
    type: galaxy
    signatures:
      - https://examplehost.com/detached_signature.asc
      - file:///path/to/local/detached_signature.asc

The type key can be set to file, galaxy, git, url, dir, or subdirs. If type is omitted, the name key is used to implicitly determine the source of the collection.

When you install a collection with type: git, the version key can refer to a branch or to a git commit-ish object (commit or tag). For example:

collections:
  - name: https://github.com/organization/repo_name.git
    type: git
    version: devel

You can also add roles to a requirements.yml file, under the roles key. The values follow the same format as a requirements file used in older Ansible releases.

---
roles:
  # Install a role from Ansible Galaxy.
  - name: geerlingguy.java
    version: "1.9.6" # note that ranges are not supported for roles


collections:
  # Install a collection from Ansible Galaxy.
  - name: geerlingguy.php_roles
    version: ">=0.9.3"
    source: https://galaxy.ansible.com

To install both roles and collections at the same time with one command, run the following:

$ ansible-galaxy install -r requirements.yml

Running ansible-galaxy collection install -r or ansible-galaxy role install -r will only install collections, or roles respectively.

Note

Installing both roles and collections from the same requirements file will not work when specifying a custom collection or role install path. In this scenario the collections will be skipped and the command will process each like ansible-galaxy role install would.

Downloading a collection for offline use

To download the collection tarball from Galaxy for offline use:

  1. Navigate to the collection page.

  2. Click on Download tarball.

You may also need to manually download any dependent collections.

Installing a collection from source files

Ansible can also install from a source directory in several ways:

collections:
  # directory containing the collection
  - source: ./my_namespace/my_collection/
    type: dir

  # directory containing a namespace, with collections as subdirectories
  - source: ./my_namespace/
    type: subdirs

Ansible can also install a collection collected with ansible-galaxy collection build or downloaded from Galaxy for offline use by specifying the output file directly:

collections:
  - name: /tmp/my_namespace-my_collection-1.0.0.tar.gz
    type: file

Note

Relative paths are calculated from the current working directory (where you are invoking ansible-galaxy install -r from). They are not taken relative to the requirements.yml file.

Installing a collection from a git repository

You can install a collection from a git repository instead of from Galaxy or Automation Hub. As a developer, installing from a git repository lets you review your collection before you create the tarball and publish the collection. As a user, installing from a git repository lets you use collections or versions that are not in Galaxy or Automation Hub yet.

The repository must contain a galaxy.yml or MANIFEST.json file. This file provides metadata such as the version number and namespace of the collection.

Installing a collection from a git repository at the command line

To install a collection from a git repository at the command line, use the URI of the repository instead of a collection name or path to a tar.gz file. Use the prefix git+, unless you’re using SSH authentication with the user git (for example, git@github.com:ansible-collections/ansible.windows.git). You can specify a branch, commit, or tag using the comma-separated git commit-ish syntax.

For example:

# Install a collection in a repository using the latest commit on the branch 'devel'
ansible-galaxy collection install git+https://github.com/organization/repo_name.git,devel

# Install a collection from a private github repository
ansible-galaxy collection install [email protected]:organization/repo_name.git

# Install a collection from a local git repository
ansible-galaxy collection install git+file:///home/user/path/to/repo_name.git

Warning

Embedding credentials into a git URI is not secure. Use safe authentication options to prevent your credentials from being exposed in logs or elsewhere.

Specifying the collection location within the git repository

When you install a collection from a git repository, Ansible uses the collection galaxy.yml or MANIFEST.json metadata file to build the collection. By default, Ansible searches two paths for collection galaxy.yml or MANIFEST.json metadata files:

  • The top level of the repository.

  • Each directory in the repository path (one level deep).

If a galaxy.yml or MANIFEST.json file exists in the top level of the repository, Ansible uses the collection metadata in that file to install an individual collection.

├── galaxy.yml
├── plugins/
│   ├── lookup/
│   ├── modules/
│   └── module_utils/
└─── README.md

If a galaxy.yml or MANIFEST.json file exists in one or more directories in the repository path (one level deep), Ansible installs each directory with a metadata file as a collection. For example, Ansible installs both collection1 and collection2 from this repository structure by default:

├── collection1
│   ├── docs/
│   ├── galaxy.yml
│   └── plugins/
│       ├── inventory/
│       └── modules/
└── collection2
    ├── docs/
    ├── galaxy.yml
    ├── plugins/
    |   ├── filter/
    |   └── modules/
    └── roles/

If you have a different repository structure or only want to install a subset of collections, you can add a fragment to the end of your URI (before the optional comma-separated version) to indicate the location of the metadata file or files. The path should be a directory, not the metadata file itself. For example, to install only collection2 from the example repository with two collections:

ansible-galaxy collection install git+https://github.com/organization/repo_name.git#/collection2/

In some repositories, the main directory corresponds to the namespace:

namespace/
├── collectionA/
|   ├── docs/
|   ├── galaxy.yml
|   ├── plugins/
|   │   ├── README.md
|   │   └── modules/
|   ├── README.md
|   └── roles/
└── collectionB/
    ├── docs/
    ├── galaxy.yml
    ├── plugins/
    │   ├── connection/
    │   └── modules/
    ├── README.md
    └── roles/

You can install all collections in this repository, or install one collection from a specific commit:

# Install all collections in the namespace
ansible-galaxy collection install git+https://github.com/organization/repo_name.git#/namespace/

# Install an individual collection using a specific commit
ansible-galaxy collection install git+https://github.com/organization/repo_name.git#/namespace/collectionA/,7b60ddc245bc416b72d8ea6ed7b799885110f5e5

Listing installed collections

To list installed collections, run ansible-galaxy collection list. See Listing collections for more details.

Configuring the ansible-galaxy client

By default, ansible-galaxy uses https://galaxy.ansible.com as the Galaxy server (as listed in the ansible.cfg file under GALAXY_SERVER).

You can use either option below to configure ansible-galaxy collection to use other servers (such as a custom Galaxy server):

To configure a Galaxy server list in ansible.cfg:

  1. Add the server_list option under the [galaxy] section to one or more server names.

  2. Create a new section for each server name.

  3. Set the url option for each server name.

  4. Optionally, set the API token for each server name. Go to https://galaxy.ansible.com/me/preferences and click Show API key.

Note

The url option for each server name must end with a forward slash /. If you do not set the API token in your Galaxy server list, use the --api-key argument to pass in the token to the ansible-galaxy collection publish command.

The following example shows how to configure multiple servers:

[galaxy]
server_list = my_org_hub, release_galaxy, test_galaxy, my_galaxy_ng

[galaxy_server.my_org_hub]
url=https://automation.my_org/
username=my_user
password=my_pass

[galaxy_server.release_galaxy]
url=https://galaxy.ansible.com/
token=my_token

[galaxy_server.test_galaxy]
url=https://galaxy-dev.ansible.com/
token=my_test_token

[galaxy_server.my_galaxy_ng]
url=http://my_galaxy_ng:8000/api/automation-hub/
auth_url=http://my_keycloak:8080/auth/realms/myco/protocol/openid-connect/token
client_id=galaxy-ng
token=my_keycloak_access_token

Note

You can use the --server command line argument to select an explicit Galaxy server in the server_list and the value of this argument should match the name of the server. To use a server not in the server list, set the value to the URL to access that server (all servers in the server list will be ignored). Also you cannot use the --api-key argument for any of the predefined servers. You can only use the api_key argument if you did not define a server list or if you specify a URL in the --server argument.

Galaxy server list configuration options

The GALAXY_SERVER_LIST option is a list of server identifiers in a prioritized order. When searching for a collection, the install process will search in that order, for example, automation_hub first, then my_org_hub, release_galaxy, and finally test_galaxy until the collection is found. The actual Galaxy instance is then defined under the section [galaxy_server.{{ id }}] where {{ id }} is the server identifier defined in the list. This section can then define the following keys:

  • url: The URL of the Galaxy instance to connect to. Required.

  • token: An API token key to use for authentication against the Galaxy instance. Mutually exclusive with username.

  • username: The username to use for basic authentication against the Galaxy instance. Mutually exclusive with token.

  • password: The password to use, in conjunction with username, for basic authentication.

  • auth_url: The URL of a Keycloak server ‘token_endpoint’ if using SSO authentication (for example, galaxyNG). Mutually exclusive with username. Requires token.

  • validate_certs: Whether or not to verify TLS certificates for the Galaxy server. This defaults to True unless the --ignore-certs option is provided or GALAXY_IGNORE_CERTS is configured to True.

  • client_id: The Keycloak token’s client_id to use for authentication. Requires auth_url and token. The default client_id is cloud-services to work with Red Hat SSO.

As well as defining these server options in the ansible.cfg file, you can also define them as environment variables. The environment variable is in the form ANSIBLE_GALAXY_SERVER_{{ id }}_{{ key }} where {{ id }} is the upper case form of the server identifier and {{ key }} is the key to define. For example I can define token for release_galaxy by setting ANSIBLE_GALAXY_SERVER_RELEASE_GALAXY_TOKEN=secret_token.

For operations that use only one Galaxy server (for example, the publish, info, or install commands). the ansible-galaxy collection command uses the first entry in the server_list, unless you pass in an explicit server with the --server argument.

Note

ansible-galaxy can seek out dependencies on other configured Galaxy instances to support the use case where a collection can depend on a collection from another Galaxy instance.

Finding roles on Galaxy

Search the Galaxy database by tags, platforms, author and multiple keywords. For example:

$ ansible-galaxy search elasticsearch --author geerlingguy

The search command will return a list of the first 1000 results matching your search:

Found 2 roles matching your search:

Name                              Description
----                              -----------
geerlingguy.elasticsearch         Elasticsearch for Linux.
geerlingguy.elasticsearch-curator Elasticsearch curator for Linux.

Get more information about a role

Use the info command to view more detail about a specific role:

$ ansible-galaxy info username.role_name

This returns everything found in Galaxy for the role:

Role: username.role_name
    description: Installs and configures a thing, a distributed, highly available NoSQL thing.
    active: True
    commit: c01947b7bc89ebc0b8a2e298b87ab416aed9dd57
    commit_message: Adding travis
    commit_url: https://github.com/username/repo_name/commit/c01947b7bc89ebc0b8a2e298b87ab
    company: My Company, Inc.
    created: 2015-12-08T14:17:52.773Z
    download_count: 1
    forks_count: 0
    github_branch:
    github_repo: repo_name
    github_user: username
    id: 6381
    is_valid: True
    issue_tracker_url:
    license: Apache
    min_ansible_version: 1.4
    modified: 2015-12-08T18:43:49.085Z
    namespace: username
    open_issues_count: 0
    path: /Users/username/projects/roles
    scm: None
    src: username.repo_name
    stargazers_count: 0
    travis_status_url: https://travis-ci.org/username/repo_name.svg?branch=main
    version:
    watchers_count: 1

Installing roles from Galaxy

The ansible-galaxy command comes bundled with Ansible, and you can use it to install roles from Galaxy or directly from a git based SCM. You can also use it to create a new role, remove roles, or perform tasks on the Galaxy website.

The command line tool by default communicates with the Galaxy website API using the server address https://galaxy.ansible.com. If you run your own internal Galaxy server and want to use it instead of the default one, pass the --server option following the address of this galaxy server. You can set permanently this option by setting the Galaxy server value in your ansible.cfg file to use it . For information on setting the value in ansible.cfg see GALAXY_SERVER.

Installing roles

Use the ansible-galaxy command to download roles from the Galaxy website

$ ansible-galaxy install namespace.role_name

Setting where to install roles

By default, Ansible downloads roles to the first writable directory in the default list of paths ~/.ansible/roles:/usr/share/ansible/roles:/etc/ansible/roles. This installs roles in the home directory of the user running ansible-galaxy.

You can override this with one of the following options:

  • Set the environment variable ANSIBLE_ROLES_PATH in your session.

  • Use the --roles-path option for the ansible-galaxy command.

  • Define roles_path in an ansible.cfg file.

The following provides an example of using --roles-path to install the role into the current working directory:

$ ansible-galaxy install --roles-path . geerlingguy.apache

See also

Configuring Ansible

All about configuration files

Installing a specific version of a role

When the Galaxy server imports a role, it imports any git tags matching the Semantic Version format as versions. In turn, you can download a specific version of a role by specifying one of the imported tags.

To see the available versions for a role:

  1. Locate the role on the Galaxy search page.

  2. Click on the name to view more details, including the available versions.

You can also navigate directly to the role using the /<namespace>/<role name>. For example, to view the role geerlingguy.apache, go to https://galaxy.ansible.com/geerlingguy/apache.

To install a specific version of a role from Galaxy, append a comma and the value of a GitHub release tag. For example:

$ ansible-galaxy install geerlingguy.apache,1.0.0

It is also possible to point directly to the git repository and specify a branch name or commit hash as the version. For example, the following will install a specific commit:

$ ansible-galaxy install git+https://github.com/geerlingguy/ansible-role-apache.git,0b7cd353c0250e87a26e0499e59e7fd265cc2f25

Installing multiple roles from a file

You can install multiple roles by including the roles in a requirements.yml file. The format of the file is YAML, and the file extension must be either .yml or .yaml.

Use the following command to install roles included in requirements.yml:

$ ansible-galaxy install -r requirements.yml

Again, the extension is important. If the .yml extension is left off, the ansible-galaxy CLI assumes the file is in an older, now deprecated, “basic” format.

Each role in the file will have one or more of the following attributes:

src

The source of the role. Use the format namespace.role_name, if downloading from Galaxy; otherwise, provide a URL pointing to a repository within a git based SCM. See the examples below. This is a required attribute.

scm

Specify the SCM. As of this writing only git or hg are allowed. See the examples below. Defaults to git.

version:

The version of the role to download. Provide a release tag value, commit hash, or branch name. Defaults to the branch set as a default in the repository, otherwise defaults to the master.

name:

Download the role to a specific name. Defaults to the Galaxy name when downloading from Galaxy, otherwise it defaults to the name of the repository.

Use the following example as a guide for specifying roles in requirements.yml:

# from galaxy
- name: yatesr.timezone

# from locally cloned git repository (git+file:// requires full paths)
- src: git+file:///home/bennojoy/nginx

# from GitHub
- src: https://github.com/bennojoy/nginx

# from GitHub, overriding the name and specifying a specific tag
- name: nginx_role
  src: https://github.com/bennojoy/nginx
  version: main

# from GitHub, specifying a specific commit hash
- src: https://github.com/bennojoy/nginx
  version: "ee8aa41"

# from a webserver, where the role is packaged in a tar.gz
- name: http-role-gz
  src: https://some.webserver.example.com/files/main.tar.gz

# from a webserver, where the role is packaged in a tar.bz2
- name: http-role-bz2
  src: https://some.webserver.example.com/files/main.tar.bz2

# from a webserver, where the role is packaged in a tar.xz (Python 3.x only)
- name: http-role-xz
  src: https://some.webserver.example.com/files/main.tar.xz

# from Bitbucket
- src: git+https://bitbucket.org/willthames/git-ansible-galaxy
  version: v1.4

# from Bitbucket, alternative syntax and caveats
- src: https://bitbucket.org/willthames/hg-ansible-galaxy
  scm: hg

# from GitLab or other git-based scm, using git+ssh
- src: [email protected]:mygroup/ansible-core.git
  scm: git
  version: "0.1"  # quoted, so YAML doesn't parse this as a floating-point value

Warning

Embedding credentials into a SCM URL is not secure. Make sure to use safe auth options for security reasons. For example, use SSH, netrc or http.extraHeader/url.<base>.pushInsteadOf in Git config to prevent your creds from being exposed in logs.

Installing roles and collections from the same requirements.yml file

You can install roles and collections from the same requirements files

---
roles:
  # Install a role from Ansible Galaxy.
  - name: geerlingguy.java
    version: "1.9.6" # note that ranges are not supported for roles

collections:
  # Install a collection from Ansible Galaxy.
  - name: geerlingguy.php_roles
    version: ">=0.9.3"
    source: https://galaxy.ansible.com

Installing multiple roles from multiple files

For large projects, the include directive in a requirements.yml file provides the ability to split a large file into multiple smaller files.

For example, a project may have a requirements.yml file, and a webserver.yml file.

Below are the contents of the webserver.yml file:

# from github
- src: https://github.com/bennojoy/nginx

# from Bitbucket
- src: git+https://bitbucket.org/willthames/git-ansible-galaxy
  version: v1.4

The following shows the contents of the requirements.yml file that now includes the webserver.yml file:

# from galaxy
- name: yatesr.timezone
- include: <path_to_requirements>/webserver.yml

To install all the roles from both files, pass the root file, in this case requirements.yml on the command line, as follows:

$ ansible-galaxy install -r requirements.yml

Dependencies

Roles can also be dependent on other roles, and when you install a role that has dependencies, those dependencies will automatically be installed to the roles_path.

There are two ways to define the dependencies of a role:

  • using meta/requirements.yml

  • using meta/main.yml

Using meta/requirements.yml

New in version 2.10.

You can create the file meta/requirements.yml and define dependencies in the same format used for requirements.yml described in the Installing multiple roles from a file section.

From there, you can import or include the specified roles in your tasks.

Using meta/main.yml

Alternatively, you can specify role dependencies in the meta/main.yml file by providing a list of roles under the dependencies section. If the source of a role is Galaxy, you can simply specify the role in the format namespace.role_name. You can also use the more complex format in requirements.yml, allowing you to provide src, scm, version, and name.

Dependencies installed that way, depending on other factors described below, will also be executed before this role is executed during play execution. To better understand how dependencies are handled during play execution, see Roles.

The following shows an example meta/main.yml file with dependent roles:

---
dependencies:
  - geerlingguy.java

galaxy_info:
  author: geerlingguy
  description: Elasticsearch for Linux.
  company: "Midwestern Mac, LLC"
  license: "license (BSD, MIT)"
  min_ansible_version: 2.4
  platforms:
  - name: EL
    versions:
    - all
  - name: Debian
    versions:
    - all
  - name: Ubuntu
    versions:
    - all
  galaxy_tags:
    - web
    - system
    - monitoring
    - logging
    - lucene
    - elk
    - elasticsearch

Tags are inherited down the dependency chain. In order for tags to be applied to a role and all its dependencies, the tag should be applied to the role, not to all the tasks within a role.

Roles listed as dependencies are subject to conditionals and tag filtering, and may not execute fully depending on what tags and conditionals are applied.

If the source of a role is Galaxy, specify the role in the format namespace.role_name:

dependencies:
  - geerlingguy.apache
  - geerlingguy.ansible

Alternately, you can specify the role dependencies in the complex form used in requirements.yml as follows:

dependencies:
  - name: geerlingguy.ansible
  - name: composer
    src: git+https://github.com/geerlingguy/ansible-role-composer.git
    version: 775396299f2da1f519f0d8885022ca2d6ee80ee8

Note

Galaxy expects all role dependencies to exist in Galaxy, and therefore dependencies to be specified in the namespace.role_name format. If you import a role with a dependency where the src value is a URL, the import process will fail.

List installed roles

Use list to show the name and version of each role installed in the roles_path.

$ ansible-galaxy list
  - ansible-network.network-engine, v2.7.2
  - ansible-network.config_manager, v2.6.2
  - ansible-network.cisco_nxos, v2.7.1
  - ansible-network.vyos, v2.7.3
  - ansible-network.cisco_ios, v2.7.0

Remove an installed role

Use remove to delete a role from roles_path:

$ ansible-galaxy remove namespace.role_name

See also

Using Ansible collections

Shareable collections of modules, playbooks and roles

Roles

Reusable tasks, handlers, and other files in a known directory structure

Working with command line tools

Perform other related operations