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Install machine runner 3 on Linux

1 month ago
Cloud Server v4.4+

This page describes how to install CircleCI’s machine runner 3 on Linux.

Prerequisites

To install machine runners and run jobs, you will need to have root access, and have the following utilities and tools installed on your system:

  • Coreutils

  • curl

  • sha256sum (if not pre-installed):

    • sudo apt install coreutils for Ubuntu/Debian

    • sudo yum install coreutils for Red Hat

  • tar

  • Gzip

  • sepolicy (RHEL 8 only)

  • rpmbuild (RHEL 8 only)

  • GPG 2.1+

  • The CircleCI CLI if you wish to install runners from the command line.

Self-hosted runner terms agreement

  • Web app installation

  • CLI installation

Before you can install self-hosted runners through the web app, you will need to agree to the CircleCI Runner Terms. To access the Runners section of the CircleCI web app an organization admin must agree to the terms at Org  Runners.

Runner terms and conditions
Figure 1. Runner terms and conditions

Once the terms have been accepted, Runners will appear permanently in the side navigation.

Your role within your org is determined differently depending on how you integrate with your code, as follows:

  • If you have a github or bitbucket type organization, CircleCI mirrors VCS permissions for organizations. If you are an admin on your organization’s VCS, you are an admin on CircleCI. If you are unsure, check the admin permissions on your VCS.

  • If you have a circleci type organization, you can check roles by navigating to Org  People. Full details on roles and permissions are available in the Roles and Permissions Overview.

Find out about organization types in the Users, Organizations and Integrations Guide.

If you are installing and using self-hosted runners through the CLI, you are agreeing to the CircleCI Runner Terms.

1. Create namespace and resource class

  • Web app installation

  • CLI installation

To install self-hosted runners, you need to create a CircleCI namespace and resource class. Once set up you will receive a resource class token. You must be an organization admin to complete this process. View your installed runners on the inventory page in the web app by selecting Runners from the sidebar.

If you already create orb in your organization you will already have a namespace configured. You must use this same namespace for runners. Each organization can only create a single namespace.

  1. On the CircleCI web app, navigate to Runners and select Create Resource Class.

    Runner set up
    Figure 2. Runner set up, step one - Get started

  2. Create a custom Resource Class. You will configure jobs to use this resource class when you want them to run on your self-hosted runner.

    We suggest using a lowercase representation of your CircleCI account name for your namespace. CircleCI will populate your org name as the suggested namespace by default in the UI.

    Namespace and resource classes must follow specific naming conventions:

    • The namespace can contain lowercase letters, numbers, underscores, and dashes.

    • The resource class name can contain uppercase and lowercase letters, numbers, colons, underscores, dashes, and plus signs.

      Runner set up
      Figure 3. Runner set up, step two - Create a namespace and resource class

  3. Enter a description for your resource class. This is an optional field.

  4. Select Save and continue to save and view your resource class token.

  5. Copy and save the resource class token. Self-hosted runners use this token to claim work for the associated resource class.

    The token is only displayed once, be sure to store it safely.
    Runner set up
    Figure 4. Runner set up, step three - Create a resource class token

  6. Select the Machine tab and progress on to the platform-specific instructions in the next section of this installation guide.

If you are installing self-hosted runners for server, the CircleCI CLI needs to be configured using your server API key. Run circleci setup to configure the CLI and access the option to supply a new API token if required.

To install self-hosted runners, you need to create a CircleCI namespace and resource class. Once set up you will receive a resource class token. You must be an organization admin to complete this process. View your installed runners on the inventory page in the web app by selecting Runners from the sidebar.

If you already create orb in your organization you will already have a namespace configured. You must use this same namespace for runners. Each organization can only create a single namespace.

  1. Create a namespace for your organization’s self-hosted runners if you do not already have one configured. We suggest using a lowercase representation of your CircleCI organization’s account name.

    Use the following command to create your CircleCI organization’s namespace:

    $ circleci namespace create <name> --org-id <your-organization-id>

  2. Create a resource class for your runner using the following command. You will configure jobs to use this resource class when you want them to run on your slef-hosted runner:

    $ circleci runner resource-class create <namespace>/<resource-class> <description> --generate-token

    Make sure to replace <namespace> and <resource-class> with your org namespace and desired resource class name, respectively. You can add a description but this is optional.

    Resource class names must follow specific naming conventions.

    • The namespace can contain lowercase letters, numbers, underscores, and dashes.

    • The resource class name can contain uppercase and lowercase letters, numbers, colons, underscores, dashes, and plus signs.

      The resource class token is returned after the runner resource class is successfully created.

      The token is only displayed once, so be sure to store it safely.

2. Install CircleCI runner

  • Debian

  • rpm

The easiest way to install runner on a Debian or Ubuntu system is to use CircleCI’s pre-built packages.

  1. On the target machine, install the CircleCI registry. This script will automatically run apt-get update:

    curl -s https://packagecloud.io/install/repositories/circleci/runner/script.deb.sh?any=true | sudo bash

  2. Next, install the circleci-runner package:

    sudo apt-get install -y circleci-runner

  3. Replace << AUTH_TOKEN >> with the token generated in the steps above. You may use your text editor to do this, or edit and run the following commands to replace the token automatically:

    export RUNNER_AUTH_TOKEN="your-runner-auth-token-here"
sudo sed -i "s/<< AUTH_TOKEN >>/$RUNNER_AUTH_TOKEN/g" /etc/circleci-runner/circleci-runner-config.yaml

  4. If you are using CircleCI Server you will need to provide the URL for your installation. You can do this by either setting the CIRCLECI_RUNNER_API_URL environment variable:

    export CIRCLECI_RUNNER_API_URL="your server domain"

    Or by adding the URL to /etc/circleci-runner/circleci-runner-config.yaml using text editor of your choice.

    api:
  auth_token: << AUTH_TOKEN >>
  # On server, set url to the hostname of your server installation.
  url: https://your.domain.here

  5. Start the circleci-runner service, and check that it is currently running:

    sudo systemctl enable circleci-runner && sudo systemctl start circleci-runner

# Check status
sudo systemctl status circleci-runner

The easiest way to install runner on a Red Hat, CentOS, or Fedora system is to use CircleCI’s pre-built packages.

  1. On the target machine, install the CircleCI registry:

    curl -s https://packagecloud.io/install/repositories/circleci/runner/script.rpm.sh?any=true | sudo bash

  2. Next, install the circleci-runner package:

    sudo yum install circleci-runner -y

  3. Replace << AUTH_TOKEN >> with the token generated in the steps above. You may use your text editor to do this, or edit and run the following commands to replace the token automatically:

    export RUNNER_AUTH_TOKEN="your-runner-auth-token-here"
sudo sed -i "s/<< AUTH_TOKEN >>/$RUNNER_AUTH_TOKEN/g" /etc/circleci-runner/circleci-runner-config.yaml

  4. Enable and start the circleci-runner service, and check that it is currently running:

    sudo systemctl enable circleci-runner && sudo systemctl start circleci-runner

# Check status
sudo systemctl status circleci-runner

Machine runner configuration example

Once you have installed the runner, select Continue in the CircleCI web app. You will be presented with an example configuration snippet showing a job configured to use your new self-hosted runner resource class.

Runner set up
Figure 5. Runner set up, copy code to config file

The fields you must set for a specific job to run using your machine runners are:

  • machine: true

  • resource_class: <namespace>/<resource-class>

Simple example of how you could set up a job:

version: 2.1

workflows:
  build-workflow:
    jobs:
      - runner
jobs:
  runner:
    machine: true
    resource_class: <namespace>/<resource-class>
    steps:
      - run: echo "Hi I'm on Runners!"

The job will then execute using your self-hosted runner when you push the .circleci/config.yml to your VCS provider.

Troubleshooting

Refer to the Troubleshoot Machine Runner section of the Troubleshoot Self-hosted Runner guide if you encounter issues installing or running machine runner on Linux.

Additional resources