Advanced configuration

Advanced configuration settings for Continuous Delivery help you fine-tune aspects of the software that can impact runtime and operation speed.

Improve job performance by caching Git repositories

If you have large Git repositories, you can enable Git repository caching to improve job performance. By default, repository caching is disabled.

The cached repository's files and data are stored on the container running Continuous Delivery at /<DEFAULT_ROOT_STORAGE_DIRECTORY>/repos. The entire repository is cloned from source control, including branches; therefore, caching requires space equivalent to the size of the uncompressed repository.

Cached repositories are not automatically deleted. When attempting to read from the cached repository, if the cached version is missing object ID references, or if the previous cache attempt failed, then the cached version is deleted and re-cloned.

Enable repository caching, as outlined in the Configuration reference, using:

 repo_caching: true

Including the .git directory in cached repositories

The .git directory is automatically omitted when copying cached Git repositories to job hardware. This means that the job cannot perform Git actions on the code. If needed, you can adjust this setting so that the .git directory is included in the cached repository.

Include the .git directory in copies of cached Git repositories sent to job hardware, as outlined in the Configuration reference, using:

include_git_history_for_jobs: true

Use custom TLS certificates

By default, Continuous Delivery uses automatically generated certificates. Your organization's security policies might require using custom certificates or adding additional certificates. Use these steps to configure custom TLS certificates for the Continuous Delivery web UI connection.

Before you begin:
It is recommended to do this after you Install Continuous Delivery, but you could do this during initial setup.
  1. Obtain a custom certificate and accompanying key pair. You need the entire certificate, including the header and footer, and the private key. Most configurations also need a CA certificate chain.

    Make sure you have configured the DNS names you want to use for Continuous Delivery. When you generate and sign the CSR, make sure it includes subject alternative names for all DNS names used to connect to the Continuous Delivery host.

  2. Edit the Hiera section in the data/common.yaml file.
  3. Combine your certificate and CA to create a cert chain and add this to Hiera for the ssl_cert_chain key.
  4. Add your CRL that the provided CA is associated with in the ssl_crl setting in Hiera.
  5. Copy your private key to a file called key.txt and run:
    bolt secret encrypt -- "$(<key.txt)"

    This generates an encrypted string.

  6. Copy the encrypted string from the previous step to the ssl_private_key setting in Hiera.

  7. Update the configuration with the Hiera changes:
    bolt plan run cd4peadm::apply_configuration
  8. Optional: Use OpenSSL or curl commands to verify your certificates.
What to do next
If you want to go back to using the automatically generated certificates, remove the above keys from Hiera and re-run the configure plan.

To use a custom certificate for your Continuous Delivery SAML SSO configuration, refer to Configure SAML.

Enable compiler maintenance mode

You can tell Continuous Delivery to skip offline or unavailable compilers and replicas when deploying code.

With this setting enabled, Code Manager deployments are reported as successful as long as the code was deployed to the primary server. Continuous Delivery does not tell you if it skipped a compiler or replica. You are only notified if the deployment to the primary server failed.

You must manually monitor the status of your compilers and replicas to ensure they're in sync with the primary server. If a compiler or replica is out of sync, you'll need to manually deploy code to that compiler or replica.

To enable this setting:

  1. In the Continuous Delivery web UI, navigate to Settings > Puppet Enterprise.
  2. Locate the PE instance you want to configure and click More actions > Edit integration.
  3. In the Compiler maintenance mode section, enable Ignore unavailable compilers or replicas when deploying code.
  4. Click Save changes.
This setting allows your pipelines to continue while compilers are undergoing maintenance or experiencing transient issues. When enabled, Code Manager deployments report as successful as long as the code was deployed to the primary server. Therefore, you must manually track that the code on your compilers and replicas is in sync.

Use the Code Manager API GET /v1/deploys/status endpoint to make sure your compilers and replicas are in sync with the primary server. The file-sync-client-status portion of the response contains all servers with code synced. In the deployed array for each server, compare the deploy-signature and date for each deployment. The deploy-signature is the hash of the git commit that was last synced to the server. If a compiler or replica has a different hash that the primary, you must Deploy code manually to the desynchronized compiler or replica.