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(PE-39412) PEADM should be able to add multiple compilers at once without requiring service restarts on Primary (#512)
* feat(plans): add_compilers plan created - Added `peadm::add_compilers` to support adding multiple compilers. - Updated parameter `compiler_host` to `compiler_hosts` to accept an array of compiler targets. - Modified `dns_alt_names` parameter to accept an array of strings, each representing a comma-separated list of DNS alt names. - Updated all references in documentation and tests to reflect the new plan name. - Enhanced the plan to handle multiple compilers in parallel, including updating PostgreSQL configurations and running necessary tasks on each compiler. - Introduced a new plan `peadm::add_compiler` as a proxy for `peadm::add_compilers`.
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‎.github/workflows/test-add-compiler-matrix.yml‎

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architecture=${{ matrix.architecture }} \
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console_password=${{ secrets.CONSOLE_PASSWORD }} \
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version=${{ matrix.version }}
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- name: Run add_compiler plan
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- name: Run add_compilers plan
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timeout-minutes: 50
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run: |
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bundle exec bolt plan run peadm_spec::add_compiler -v \
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bundle exec bolt plan run peadm_spec::add_compilers -v \
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--inventoryfile spec/fixtures/litmus_inventory.yaml \
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--modulepath spec/fixtures/modules \
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architecture=${{ matrix.architecture }}

‎.github/workflows/test-add-compiler.yaml‎

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architecture=${{ matrix.architecture }} \
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version=${{ matrix.version }} \
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console_password=${{ secrets.CONSOLE_PASSWORD }
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- name: Run add_compiler plan
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- name: Run add_compilers plan
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timeout-minutes: 50
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run: |
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bundle exec bolt plan run peadm_spec::add_compiler -v \
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bundle exec bolt plan run peadm_spec::add_compilers -v \
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--inventoryfile spec/fixtures/litmus_inventory.yaml \
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--modulepath spec/fixtures/modules \
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architecture=${{ matrix.architecture }} \

‎REFERENCE.md‎

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#### Public Plans
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* [`peadm::add_compiler`](#peadm--add_compiler): Add a new compiler to a PE architecture or replace an existing one with new configuration.
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* [`peadm::add_compiler`](#peadm--add_compiler): Proxy plan for peadm::add_compilers.
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* [`peadm::add_compilers`](#peadm--add_compilers): Add new compilers to a PE architecture or replace an existing with new configuration.
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* [`peadm::add_database`](#peadm--add_database)
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* [`peadm::add_replica`](#peadm--add_replica): Add or replace a replica host.
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Supported use cases:
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### <a name="peadm--add_compiler"></a>`peadm::add_compiler`
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Add a new compiler to a PE architecture or replace an existing one with new configuration.
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Proxy plan for peadm::add_compilers.
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#### Parameters
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Data type: `Enum['A', 'B']`
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_ Either A or B; whichever of the two letter designations the compiler is being assigned to
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_ Either A or B; whichever of the two letter designations the compiler are being assigned to
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Default value: `'A'`
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Data type: `Optional[String[1]]`
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_ A comma_separated list of DNS alt names for the compiler
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_ A comma-separated list of DNS alt names for the compiler.
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Default value: `undef`
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Default value: `undef`
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### <a name="peadm--add_compilers"></a>`peadm::add_compilers`
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Add new compilers to a PE architecture or replace an existing with new configuration.
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#### Parameters
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The following parameters are available in the `peadm::add_compilers` plan:
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* [`avail_group_letter`](#-peadm--add_compilers--avail_group_letter)
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* [`compiler_hosts`](#-peadm--add_compilers--compiler_hosts)
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* [`dns_alt_names`](#-peadm--add_compilers--dns_alt_names)
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* [`primary_host`](#-peadm--add_compilers--primary_host)
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* [`primary_postgresql_host`](#-peadm--add_compilers--primary_postgresql_host)
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##### <a name="-peadm--add_compilers--avail_group_letter"></a>`avail_group_letter`
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Data type: `Enum['A', 'B']`
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_ Either A or B; whichever of the two letter designations the compilers are being assigned to
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Default value: `'A'`
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##### <a name="-peadm--add_compilers--compiler_hosts"></a>`compiler_hosts`
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Data type: `TargetSpec`
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_ The hostnames and certnames of the new compilers
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##### <a name="-peadm--add_compilers--dns_alt_names"></a>`dns_alt_names`
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Data type: `Optional[Array[String[1]]]`
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_ An array of strings, where each string is a comma-separated list of DNS alt names for the compilers. Order matters; if a compiler doesn't need dns_alt_names, use "undef" as string.
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Default value: `undef`
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##### <a name="-peadm--add_compilers--primary_host"></a>`primary_host`
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Data type: `Peadm::SingleTargetSpec`
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_ The hostname and certname of the primary Puppet server
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##### <a name="-peadm--add_compilers--primary_postgresql_host"></a>`primary_postgresql_host`
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Data type: `Optional[Peadm::SingleTargetSpec]`
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_ The hostname and certname of the PE-PostgreSQL server with availability group $avail_group_letter
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Default value: `undef`
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### <a name="peadm--add_database"></a>`peadm::add_database`
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The peadm::add_database class.

‎documentation/add_compiler.md‎

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‎documentation/add_compilers.md‎

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# Add Compilers
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- [Add Compilers](#Add-Compilers)
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- [Introduction](#Introduction)
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- [Add compilers to an existing PE cluster](#Add-compilers-to-an-existing-PE-cluster)
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- [Running the `add_compilers` plan](#running-the-add_compilers-plan)
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- [Optional Parameters](#optional-parameters)
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## Introduction
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The `peadm::add_compilers` plan can be used to add new compilers to a PE cluster or replace an existing with new configuration.
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## Add compilers to an existing PE cluster
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As seen in the example below, this is the minimal parameters required to add a compiler to an existing PE cluster. These can be passed as command line variables to the plan, or in this case added to a params.json file.
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```json
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{
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"compiler_hosts": "pe-xl-compiler-0.lab1.puppet.vm",
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"primary_host": "pe-xl-core-0.lab1.puppet.vm"
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}
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```
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And for multiple compilers, this is the minimal parameters required.
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```json
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{
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"compiler_hosts": [
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"pe-xl-compiler-0.lab1.puppet.vm",
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"pe-xl-compiler-1.lab1.puppet.vm"
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],
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"primary_host": "pe-xl-core-0.lab1.puppet.vm"
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}
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```
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## Running the `add_compiler` plan
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```
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bolt plan run peadm::add_compilers --params @params.json
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```
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This command will retrieve the current PEADM configuration to determine the setup rules needed for a compiler's secondary PuppetDB instances. The plan will configure the primary with appropriate rules for allowing access from the new compiler. On the primary, the `puppet` service is stopped and the `pe-postgresql` service is reloaded. If required, a puppet agent will be installed on the new compiler host. The compiler agent's certificate is regenerated to include data required by the `peadm::subplans::component_install` plan. A subsequent Puppet agent run will happen on the following components.
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- _\<compiler-host\>_
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- _\<primary_postgresql_host\>_
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- _\<replica host\>_
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- _\<primary_postgresql_host\>_
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The `puppet` service is then restarted.
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## Optional Parameters
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As well as `compiler_hosts` and `primary_host`, the `add_compiler` plan has a number of optional parameters. These can be viewed in the following params example.
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```json
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{
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"avail_group_letter": "B",
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"compiler_hosts": "pe-xl-compiler-0.lab1.puppet.vm",
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"dns_alt_names": ["puppet,puppet.lab1.puppet.vm"],
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"primary_host": "pe-xl-core-0.lab1.puppet.vm",
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"primary_postgresql_host": "pe-psql-6251cd-0.us-west1-a.c.slice-cody.internal"
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}
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```
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for multiple compilers.
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```json
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{
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"avail_group_letter": "B",
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"compiler_hosts": [
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"pe-xl-compiler-0.lab1.puppet.vm",
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"pe-xl-compiler-1.lab1.puppet.vm"
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],
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"dns_alt_names": [
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"puppet,puppet.lab1.puppet.vm",
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"puppet2,puppet.lab2.puppet.vm"
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],
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"primary_host": "pe-xl-core-0.lab1.puppet.vm",
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"primary_postgresql_host": "pe-psql-6251cd-0.us-west1-a.c.slice-cody.internal"
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}
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```
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Please note, the optional parameters and values of the plan are as follows.
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<!-- table -->
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| Parameter | Default value | Description |
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| ------------------------- | ------------- | ------------------------------------------------------------------------------------------------------------------------------ |
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| `avail_group_letter` | `A` | By default, each compiler will be added to the primary group A. |
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| `dns_alt_names` | `undef` | |
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| `primary_postgresql_host` | `undef` | By default, this will pre-populate to the required value depending if your architecture contains HA and or external databases. |
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For more information around adding compilers to your infrastructure [Expanding Your Deployment](expanding.md#adding-compilers-with-peadmadd_compiler)

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