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diff --git a/docs/proposals/playbook_consolidation.md b/docs/proposals/playbook_consolidation.md new file mode 100644 index 000000000..98aedb021 --- /dev/null +++ b/docs/proposals/playbook_consolidation.md @@ -0,0 +1,178 @@ +# OpenShift-Ansible Playbook Consolidation + +## Description +The designation of `byo` is no longer applicable due to being able to deploy on +physical hardware or cloud resources using the playbooks in the `byo` directory. +Consolidation of these directories will make maintaining the code base easier +and provide a more straightforward project for users and developers. + +The main points of this proposal are: +* Consolidate initialization playbooks into one set of playbooks in + `playbooks/init`. +* Collapse the `playbooks/byo` and `playbooks/common` into one set of + directories at `playbooks/openshift-*`. + +This consolidation effort may be more appropriate when the project moves to +using a container as the default installation method. + +## Design + +### Initialization Playbook Consolidation +Currently there are two separate sets of initialization playbooks: +* `playbooks/byo/openshift-cluster/initialize_groups.yml` +* `playbooks/common/openshift-cluster/std_include.yml` + +Although these playbooks are located in the `openshift-cluster` directory they +are shared by all of the `openshift-*` areas. These playbooks would be better +organized in a `playbooks/init` directory collocated with all their related +playbooks. + +In the example below, the following changes have been made: +* `playbooks/byo/openshift-cluster/initialize_groups.yml` renamed to + `playbooks/init/initialize_host_groups.yml` +* `playbooks/common/openshift-cluster/std_include.yml` renamed to + `playbooks/init/main.yml` +* `- include: playbooks/init/initialize_host_groups.yml` has been added to the + top of `playbooks/init/main.yml` +* All other related files for initialization have been moved to `playbooks/init` + +The `initialize_host_groups.yml` playbook is only one play with one task for +importing variables for inventory group conversions. This task could be further +consolidated with the play in `evaluate_groups.yml`. + +The new standard initialization playbook would be +`playbooks/init/main.yml`. + + +``` + +> $ tree openshift-ansible/playbooks/init +. +├── evaluate_groups.yml +├── initialize_facts.yml +├── initialize_host_groups.yml +├── initialize_openshift_repos.yml +├── initialize_openshift_version.yml +├── main.yml +├── roles -> ../../roles +├── validate_hostnames.yml +└── vars + └── cluster_hosts.yml +``` + +```yaml +# openshift-ansible/playbooks/init/main.yml +--- +- include: initialize_host_groups.yml + +- include: evaluate_groups.yml + +- include: initialize_facts.yml + +- include: validate_hostnames.yml + +- include: initialize_openshift_repos.yml + +- include: initialize_openshift_version.yml +``` + +### `byo` and `common` Playbook Consolidation +Historically, the `byo` directory coexisted with other platform directories +which contained playbooks that then called into `common` playbooks to perform +common installation steps for all platforms. Since the other platform +directories have been removed this separation is no longer necessary. + +In the example below, the following changes have been made: +* `playbooks/byo/openshift-master` renamed to + `playbooks/openshift-master` +* `playbooks/common/openshift-master` renamed to + `playbooks/openshift-master/private` +* Original `byo` entry point playbooks have been updated to include their + respective playbooks from `private/`. +* Symbolic links have been updated as necessary + +All user consumable playbooks are in the root of `openshift-master` and no entry +point playbooks exist in the `private` directory. Maintaining the separation +between entry point playbooks and the private playbooks allows individual pieces +of the deployments to be used as needed by other components. + +``` +openshift-ansible/playbooks/openshift-master +> $ tree +. +├── config.yml +├── private +│ ├── additional_config.yml +│ ├── config.yml +│ ├── filter_plugins -> ../../../filter_plugins +│ ├── library -> ../../../library +│ ├── lookup_plugins -> ../../../lookup_plugins +│ ├── restart_hosts.yml +│ ├── restart_services.yml +│ ├── restart.yml +│ ├── roles -> ../../../roles +│ ├── scaleup.yml +│ └── validate_restart.yml +├── restart.yml +└── scaleup.yml +``` + +```yaml +# openshift-ansible/playbooks/openshift-master/config.yml +--- +- include: ../init/main.yml + +- include: private/config.yml +``` + +With the consolidation of the directory structure and component installs being +removed from `openshift-cluster`, that directory is no longer necessary. To +deploy an entire OpenShift cluster, a playbook would be created to tie together +all of the different components. The following example shows how multiple +components would be combined to perform a complete install. + +```yaml +# openshift-ansible/playbooks/deploy_cluster.yml +--- +- include: init/main.yml + +- include: openshift-etcd/private/config.yml + +- include: openshift-nfs/private/config.yml + +- include: openshift-loadbalancer/private/config.yml + +- include: openshift-master/private/config.yml + +- include: openshift-node/private/config.yml + +- include: openshift-glusterfs/private/config.yml + +- include: openshift-hosted/private/config.yml + +- include: openshift-service-catalog/private/config.yml +``` + +## User Story +As a developer of OpenShift-Ansible, +I want simplify the playbook directory structure +so that users can easily find deployment playbooks and developers know where new +features should be developed. + +## Implementation +Given the size of this refactoring effort, it should be broken into smaller +steps which can be completed independently while still maintaining a functional +project. + +Steps: +1. Update and merge consolidation of the initialization playbooks. +2. Update each merge consolidation of each `openshift-*` component area +3. Update and merge consolidation of `openshift-cluster` + +## Acceptance Criteria +* Verify that all entry points playbooks install or configure as expected. +* Verify that CI is updated for testing new playbook locations. +* Verify that repo documentation is updated +* Verify that user documentation is updated + +## References |