Copy config under a volume for Docker (similar to a ConfigMap for K8S). (#914)
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This emulates the K8S ConfigMap behavior on Docker by using a regular volume. If a directory exists under `config/` which matches a named volume, the contents will be copied to the volume on `create` (provided the destination volume is empty). That is, rather than a ConfigMap, it is essentially a "config volume". For example, with a compose file like: ``` version: '3.7' services: caddy: image: cerc/caddy-ethcache:local restart: always volumes: - caddyconfig:/etc/caddy:ro volumes: caddyconfig: ``` And a directory: ``` ❯ ls stack-orchestrator/config/caddyconfig/ Caddyfile ``` After `laconic-so deploy create --spec-file caddy.yml --deployment-dir /srv/caddy` there will be: ``` ❯ ls /srv/caddy/data/caddyconfig Caddyfile ``` Mounted at `/etc/caddy` Reviewed-on: #914 Reviewed-by: David Boreham <dboreham@noreply.git.vdb.to> Co-authored-by: Thomas E Lackey <telackey@bozemanpass.com> Co-committed-by: Thomas E Lackey <telackey@bozemanpass.com>
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@ -520,6 +520,16 @@ def create_operation(deployment_command_context, spec_file, deployment_dir, netw
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if os.path.exists(source_config_dir):
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destination_config_dir = deployment_dir_path.joinpath("configmaps", configmap)
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copytree(source_config_dir, destination_config_dir, dirs_exist_ok=True)
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else:
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# TODO: We should probably only do this if the volume is marked :ro.
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for volume_name, volume_path in parsed_spec.get_volumes().items():
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source_config_dir = resolve_config_dir(stack_name, volume_name)
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# Only copy if the source exists and is _not_ empty.
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if os.path.exists(source_config_dir) and os.listdir(source_config_dir):
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destination_config_dir = deployment_dir_path.joinpath(volume_path)
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# Only copy if the destination exists and _is_ empty.
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if os.path.exists(destination_config_dir) and not os.listdir(destination_config_dir):
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copytree(source_config_dir, destination_config_dir, dirs_exist_ok=True)
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# Delegate to the stack's Python code
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# The deploy create command doesn't require a --stack argument so we need to insert the
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