serial-wait_for

Explicit Serial Workflow

Workflow Description

By default, multiple steps in a workflow will be run in parallel if there is no data dependency between the steps. In some cases, you may want to run steps in a serial manner when there is no such relationship between the steps. For this case, there is the wait_for option, which tells a step explicitly to wait for a condition from another step.

This workflow runs a metadata collection plugin step, and then an example plugin that waits for the success of the metadata collection before starting. All steps are run via the default deployer, and their success outputs are reported.

Files

• workflow.yaml -- Defines the workflow input schema, the plugins to run and their data relationships, and the output to present to the user
• input.yaml -- The input parameters that the user provides for running the workflow

Running the Workflow

Download the Arcaflow engine from: https://github.com/arcalot/arcaflow-engine/releases

Run the workflow:

arcaflow --input input.yaml

Example output:

output_data:
    example:
        message: Hello, Arcalot!
    metadata:
        architecture: aarch64
        env:
            _: /usr/bin/python
            AD_HOC_COMMAND_ID: "1"
            ANSIBLE_CACHE_PLUGIN: jsonfile
            ANSIBLE_CACHE_PLUGIN_CONNECTION: /tmp/artifacts/0c733cd4-fa58-4a46-9b72-b95c55435377/fact_cache
            ANSIBLE_CALLBACK_PLUGINS: /usr/local/lib/python3.9/site-packages/ansible_runner/display_callback/callback
            ANSIBLE_HOST_KEY_CHECKING: "False"
            ANSIBLE_LOAD_CALLBACK_PLUGINS: "1"
            ANSIBLE_RETRY_FILES_ENABLED: "False"
            ANSIBLE_STDOUT_CALLBACK: awx_display
            AWX_ISOLATED_DATA_DIR: /tmp/artifacts/0c733cd4-fa58-4a46-9b72-b95c55435377
            HOME: /root
            HOSTNAME: fe1ff9f0a11c
            LC_CTYPE: C.UTF-8
            PATH: /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
            PWD: /tmp
            RUNNER_OMIT_EVENTS: "False"
            RUNNER_ONLY_FAILED_EVENTS: "False"
            SHLVL: "2"
            container: podman
        fqdn: fe1ff9f0a11c
        kernel: 6.8.10-400.asahi.fc40.aarch64+16k
        memtotal_mb: 31621
        processor:
            - "0"
            - "1"
            - "2"
            - "3"
            - "4"
            - "5"
            - "6"
            - "7"
            - "8"
            - "9"
            - "10"
            - "11"
        processor_cores: 1
        processor_count: 12
        processor_threads_per_core: 1
        product_name: NA
        product_version: NA
        swaptotal_mb: 8191
        system_vendor: NA
        uptime_seconds: 610189
output_id: success

Workflow Diagram

%% Mermaid markdown workflow
flowchart LR
%% Success path
steps.example.enabling-->steps.example.enabling.resolved
steps.example.enabling-->steps.example.starting
steps.example.enabling-->steps.example.disabled
steps.metadata.cancelled-->steps.metadata.outputs
steps.example.starting-->steps.example.starting.started
steps.example.starting-->steps.example.running
steps.metadata.running-->steps.metadata.outputs
steps.example.deploy-->steps.example.starting
steps.metadata.outputs-->steps.metadata.outputs.success
steps.metadata.starting-->steps.metadata.starting.started
steps.metadata.starting-->steps.metadata.running
steps.example.disabled-->steps.example.disabled.output
steps.metadata.disabled-->steps.metadata.disabled.output
steps.metadata.outputs.success-->outputs.success
steps.metadata.outputs.success-->steps.example.starting
steps.example.running-->steps.example.outputs
steps.metadata.deploy-->steps.metadata.starting
steps.example.outputs.success-->outputs.success
steps.metadata.enabling-->steps.metadata.starting
steps.metadata.enabling-->steps.metadata.disabled
steps.metadata.enabling-->steps.metadata.enabling.resolved
steps.example.outputs-->steps.example.outputs.success
input-->steps.example.starting
steps.example.cancelled-->steps.example.outputs

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