.. _openshift-pods-driver: .. default-domain:: zuul Openshift Pods Driver --------------------- Selecting the openshift pods driver adds the following options to the :attr:`providers` section of the configuration. .. attr:: providers.[openshiftpods] :type: list The Openshift Pods driver is similar to the Openshift driver, but it only supports pod label. This enables using an unprivileged service account that doesn't require the self-provisioner role. Example: .. code-block:: yaml providers: - name: cluster driver: openshiftpods context: unprivileged-context-name pools: - name: main labels: - name: openshift-pod image: docker.io/fedora:28 .. attr:: context :required: Name of the context configured in ``kube/config``. Before using the driver, Nodepool services need a ``kube/config`` file manually installed. Make sure the context is present in ``oc config get-contexts`` command output. .. attr:: launch-retries :default: 3 The number of times to retry launching a pod before considering the job failed. .. attr:: max-pods :default: infinite :type: int An alias for `max-servers`. .. attr:: max-cores :type: int :default: unlimited Maximum number of cores usable from this provider's pools by default. This can be used to limit usage of the openshift backend. If not defined nodepool can use all cores up to the limit of the backend. .. attr:: max-servers :type: int :default: unlimited Maximum number of pods spawnable from this provider's pools by default. This can be used to limit the number of pods. If not defined nodepool can create as many servers the openshift backend allows. .. attr:: max-ram :type: int :default: unlimited Maximum ram usable from this provider's pools by default. This can be used to limit the amount of ram allocated by nodepool. If not defined nodepool can use as much ram as the openshift backend allows. .. attr:: max-resources :type: dict :default: unlimited A dictionary of other quota resource limits applicable to this provider's pools by default. Arbitrary limits may be supplied with the :attr:`providers.[openshiftpods].pools.labels.extra-resources` attribute. .. attr:: pools :type: list A pool defines a group of resources from an Openshift provider. .. attr:: name :required: The project's (namespace) name that will be used to create the pods. .. attr:: priority :type: int :default: 100 The priority of this provider pool (a lesser number is a higher priority). Nodepool launchers will yield requests to other provider pools with a higher priority as long as they are not paused. This means that in general, higher priority pools will reach quota first before lower priority pools begin to be used. This setting may be specified at the provider level in order to apply to all pools within that provider, or it can be overridden here for a specific pool. .. attr:: node-attributes :type: dict A dictionary of key-value pairs that will be stored with the node data in ZooKeeper. The keys and values can be any arbitrary string. .. attr:: max-cores :type: int Maximum number of cores usable from this pool. This can be used to limit usage of the kubernetes backend. If not defined nodepool can use all cores up to the limit of the backend. .. attr:: max-servers :type: int Maximum number of pods spawnable from this pool. This can be used to limit the number of pods. If not defined nodepool can create as many servers the kubernetes backend allows. .. attr:: max-ram :type: int Maximum ram usable from this pool. This can be used to limit the amount of ram allocated by nodepool. If not defined nodepool can use as much ram as the kubernetes backend allows. .. attr:: max-resources :type: dict :default: unlimited A dictionary of other quota resource limits applicable to this pool. Arbitrary limits may be supplied with the :attr:`providers.[openshiftpods].pools.labels.extra-resources` attribute. .. attr:: default-label-cpu :type: int Specifies specifies a default value for :attr:`providers.[openshiftpods].pools.labels.cpu` for all labels of this pool that do not set their own value. .. attr:: default-label-memory :type: int Specifies a default value in MiB for :attr:`providers.[openshiftpods].pools.labels.memory` for all labels of this pool that do not set their own value. .. attr:: default-label-storage :type: int Specifies a default value in MB for :attr:`providers.[openshiftpods].pools.labels.storage` for all labels of this pool that do not set their own value. .. attr:: default-label-cpu-limit :type: int Specifies specifies a default value for :attr:`providers.[openshiftpods].pools.labels.cpu-limit` for all labels of this pool that do not set their own value. .. attr:: default-label-memory-limit :type: int Specifies a default value in MiB for :attr:`providers.[openshiftpods].pools.labels.memory-limit` for all labels of this pool that do not set their own value. .. attr:: default-label-storage-limit :type: int Specifies a default value in MB for :attr:`providers.[openshiftpods].pools.labels.storage-limit` for all labels of this pool that do not set their own value. .. attr:: labels :type: list Each entry in a pool`s `labels` section indicates that the corresponding label is available for use in this pool. Each entry is a dictionary with the following keys .. attr:: name :required: Identifier for this label; references an entry in the :attr:`labels` section. .. attr:: image The image name. .. attr:: image-pull :default: IfNotPresent :type: str The ImagePullPolicy, can be IfNotPresent, Always or Never. .. attr:: image-pull-secrets :default: [] :type: list The imagePullSecrets needed to pull container images from a private registry. Example: .. code-block:: yaml labels: - name: openshift-pod type: pod image: docker.io/fedora:28 image-pull-secrets: - name: registry-secret .. attr:: labels :type: dict A dictionary of additional values to be added to the namespace or pod metadata. The value of this field is added to the `metadata.labels` field in OpenShift. Note that this field contains arbitrary key/value pairs and is unrelated to the concept of labels in Nodepool. .. attr:: dynamic-labels :type: dict :default: None Similar to :attr:`providers.[openshiftpods].pools.labels.labels`, but is interpreted as a format string with the following values available: * request: Information about the request which prompted the creation of this node (note that the node may ultimately be used for a different request and in that case this information will not be updated). * id: The request ID. * labels: The list of labels in the request. * requestor: The name of the requestor. * requestor_data: Key/value information from the requestor. * relative_priority: The relative priority of the request. * event_id: The external event ID of the request. * created_time: The creation time of the request. * tenant_name: The name of the tenant associated with the request. For example: .. code-block:: yaml labels: - name: pod-fedora dynamic-labels: request_info: "{request.id}" .. attr:: annotations :type: dict A dictionary of additional values to be added to the pod metadata. The value of this field is added to the `metadata.annotations` field in OpenShift. This field contains arbitrary key/value pairs that can be accessed by tools and libraries. E.g custom schedulers can make use of this metadata. .. attr:: cpu :type: int Specifies the number of cpu to request for the pod. If no limit is specified, this will also be used as the limit. .. attr:: memory :type: int Specifies the amount of memory in MiB to request for the pod. If no limit is specified, this will also be used as the limit. .. attr:: storage :type: int Specifies the amount of ephemeral-storage in MB to request for the pod. If no limit is specified, this will also be used as the limit. .. attr:: extra-resources :type: dict Specifies any extra resources that Nodepool should consider in its quota calculation other than the resources described above (cpu, memory, storage). .. attr:: cpu-limit :type: int Specifies the cpu limit for the pod. .. attr:: memory-limit :type: int Specifies the memory limit in MiB for the pod. .. attr:: storage-limit :type: int Specifies the ephemeral-storage limit in MB for the pod. .. attr:: gpu :type: float Specifies the amount of gpu allocated to the pod. This will be used to set both requests and limits to the same value, based on how kubernetes assigns gpu resources: https://kubernetes.io/docs/tasks/manage-gpus/scheduling-gpus/. .. attr:: gpu-resource :type: str Specifies the custom schedulable resource associated with the installed gpu that is available in the cluster. .. attr:: python-path :type: str :default: auto The path of the default python interpreter. Used by Zuul to set ``ansible_python_interpreter``. The special value ``auto`` will direct Zuul to use inbuilt Ansible logic to select the interpreter on Ansible >=2.8, and default to ``/usr/bin/python2`` for earlier versions. .. attr:: shell-type :type: str :default: sh The shell type of the node's default shell executable. Used by Zuul to set ``ansible_shell_type``. This setting should only be used - For a windows pod with the experimental `connection-type` ``ssh``, in which case ``cmd`` or ``powershell`` should be set and reflect the node's ``DefaultShell`` configuration. - If the default shell is not Bourne compatible (sh), but instead e.g. ``csh`` or ``fish``, and the user is aware that there is a long-standing issue with ``ansible_shell_type`` in combination with ``become`` .. attr:: env :type: list :default: [] A list of environment variables to pass to the Pod. .. attr:: name :type: str :required: The name of the environment variable passed to the Pod. .. attr:: value :type: str :required: The value of the environment variable passed to the Pod. .. attr:: node-selector :type: dict A map of key-value pairs to ensure the OpenShift scheduler places the Pod on a node with specific node labels. .. attr:: scheduler-name :type: str Sets the `schedulerName` field on the container. Normally left unset for the OpenShift default. .. attr:: privileged :type: bool Sets the `securityContext.privileged` flag on the container. Normally left unset for the OpenShift default. .. attr:: volumes :type: list Sets the `volumes` field on the pod. If supplied, this should be a list of OpenShift Pod Volume definitions. .. attr:: volume-mounts :type: list Sets the `volumeMounts` flag on the container. If supplied, this should be a list of OpenShift Container VolumeMount definitions. .. attr:: spec :type: dict This attribute is exclusive with all other label attributes except :attr:`providers.[openshiftpods].pools.labels.name` :attr:`providers.[openshiftpods].pools.labels.annotations`, :attr:`providers.[openshiftpods].pools.labels.labels` and :attr:`providers.[openshiftpods].pools.labels.dynamic-labels`. If a `spec` is provided, then Nodepool will supply the contents of this value verbatim to OpenShift as the ``spec`` attribute of the OpenShift ``Pod`` definition. No other Nodepool attributes are used, including any default values set at the provider level (such as `default-label-cpu` and similar). This attribute allows for the creation of arbitrary complex pod definitions but the user is responsible for ensuring that they are suitable. The first container in the pod is expected to be a long-running container that hosts a shell environment for running commands. The following minimal definition matches what Nodepool itself normally creates and is recommended as a starting point: .. code-block:: yaml labels: - name: custom-pod spec: containers: - name: custom-pod image: ubuntu:jammy imagePullPolicy: IfNotPresent command: ["/bin/sh", "-c"] args: ["while true; do sleep 30; done;"]