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| -rw-r--r-- | doc/source/admin/image-building.rst | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/doc/source/admin/image-building.rst b/doc/source/admin/image-building.rst index af59e4a2e..4a2c6773b 100644 --- a/doc/source/admin/image-building.rst +++ b/doc/source/admin/image-building.rst @@ -679,6 +679,97 @@ Can I use the ``--template-override`` option for custom templates? Yes! Custom repos ------------ +repos.yaml +^^^^^^^^^^ + +Kolla uses ``kolla/template/repos.yaml`` to define repositories used during +image builds. Each entry is keyed by a logical name and contains the +information needed to configure the repository. + +Repositories marked with ``distro: True`` are default repos that require no +additional configuration. For RPM-based distros they are enabled via +``dnf config-manager --enable``; for Debian-based distros they are a no-op +as the sources are already provided by the base image. Examples include +``crb``, ``extras``, and the base repos ``baseos`` and ``appstream`` for +CentOS and Rocky Linux, as well as ``debian``, ``debian-security``, +``ubuntu``, ``ubuntu-security``. + +Repositories without ``distro: True`` are fully templated into a new +repository file and must provide at least one of ``baseurl``, ``metalink``, +or ``mirrorlist`` (RPM), or ``url`` (Debian/Ubuntu). + +To override repositories (e.g. to point base repos at a local mirror), +provide a custom ``repos.yaml`` via the ``--repos-yaml`` option and supply +entries without ``distro: True`` and with the desired URL. + +Example for Rocky Linux: + +.. code-block:: yaml + + rocky: + baseos: + name: "baseos" + baseurl: "https://my-mirror.example.com/rocky/10/BaseOS/$basearch/os/" + gpgkey: "file:///etc/pki/rpm-gpg/RPM-GPG-KEY-Rocky-10" + appstream: + name: "appstream" + baseurl: "https://my-mirror.example.com/rocky/10/AppStream/$basearch/os/" + gpgkey: "file:///etc/pki/rpm-gpg/RPM-GPG-KEY-Rocky-10" + crb: + name: "crb" + baseurl: "https://my-mirror.example.com/rocky/10/CRB/$basearch/os/" + gpgkey: "file:///etc/pki/rpm-gpg/RPM-GPG-KEY-Rocky-10" + +Example for Debian: + +.. code-block:: yaml + + debian: + debian: + component: "main" + gpg_key: "/usr/share/keyrings/debian-archive-keyring.gpg" + suite: "trixie trixie-updates trixie-backports" + url: "https://my-mirror.example.com/debian" + debian-security: + component: "main" + gpg_key: "/usr/share/keyrings/debian-archive-keyring.gpg" + suite: "trixie-security" + url: "https://my-mirror.example.com/debian-security" + +Example for Ubuntu: + +.. code-block:: yaml + + ubuntu: + ubuntu: + component: "main universe" + gpg_key: "/usr/share/keyrings/ubuntu-archive-keyring.gpg" + suite: "noble noble-updates noble-backports" + url: "https://my-mirror.example.com/ubuntu/" + ubuntu-security: + component: "main universe" + gpg_key: "/usr/share/keyrings/ubuntu-archive-keyring.gpg" + suite: "noble-security" + url: "https://my-mirror.example.com/ubuntu/" + +.. code-block:: ini + + repos_yaml = /path/to/custom-repos.yaml + +When overriding a base repo, any existing ``.repo`` file on the image +containing that repository ID is automatically removed before the new one +is created. + +Some distro repos share a single ``.repo`` file on disk (for example, +``baseos``, ``appstream``, and ``crb`` all live in ``rocky.repo`` on Rocky +Linux). These repos are annotated with a ``file_group`` field in +``repos.yaml`` that names the shared file. If any repo in a ``file_group`` +is overridden, all other repos sharing that ``file_group`` must also be +overridden — otherwise removing the shared file would silently disable them. +Kolla validates this at build time and raises an error listing the missing +overrides. For Rocky Linux this means overriding ``baseos`` or ``appstream`` +requires also overriding ``crb``. + Red Hat ^^^^^^^ |