Docker Swarm compatibility

[FinlayDaG33k]

Hii there,

I'm trying to get mktxp working within Docker swarm, however, I'm running into some issues.
When I try to use a volume and put my mktxp.conf and _mktxp.conf inside, I get the following error because the container isn't using the default user (hence, I cannot set the proper permissions):

Traceback (most recent call last):
  File "/usr/local/bin/mktxp", line 8, in <module>
    sys.exit(main())
             ^^^^^^
  File "/usr/local/lib/python3.11/site-packages/mktxp/cli/dispatch.py", line 105, in main
    MKTXPDispatcher().dispatch()
  File "/usr/local/lib/python3.11/site-packages/mktxp/cli/dispatch.py", line 39, in dispatch
    self.start_export(args)
  File "/usr/local/lib/python3.11/site-packages/mktxp/cli/dispatch.py", line 89, in start_export
    ExportProcessor.start()
  File "/usr/local/lib/python3.11/site-packages/mktxp/flow/processor/base_proc.py", line 35, in start
    REGISTRY.register(CollectorHandler(RouterEntriesHandler(), CollectorRegistry()))
                                       ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/mktxp/flow/router_entries_handler.py", line 25, in __init__
    entry = config_handler.config_entry(router_name)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/mktxp/cli/config/config.py", line 199, in config_entry
    entry_reader = self._config_entry_reader(entry_name)
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/mktxp/cli/config/config.py", line 245, in _config_entry_reader
    self.config.write()
  File "/usr/local/lib/python3.11/site-packages/configobj.py", line 2128, in write
    with open(self.filename, 'wb') as h:
         ^^^^^^^^^^^^^^^^^^^^^^^^^
PermissionError: [Errno 13] Permission denied: '/home/mktxp/mktxp/mktxp.conf'

Using a config however, causes the startup to fail because the program sees it as a read-only filesystem (which is normal behaviour for a config in Docker Swarm.

version: '3.7'
services:
  mktxp:
    image: ghcr.io/akpw/mktxp:gha-3665068086
    volumes:
      - type: volume
        source: mktxp-data
        target: /home/mktxp/mktxp
    configs:
      - source: mktxp-config
        target: "/home/mktxp/mktxp/mktxp.conf"
      - source: mktxp2-config
        target: "/home/mktxp/mktxp/_mktxp.conf"
    networks:
      - default
      - bridge
networks:
  default:
    internal: true
    driver: overlay
  bridge:
    external: true
volumes:
  mktxp-data:
    driver: local
configs:
  mktxp-config:
    name: "mktxp.conf-2022_12_12-1015"
    external: true
  mktxp2-config:
    name: "mktxp2.conf-2022_12_12-1246"
    external: true

OSError: [Errno 30] Read-only file system: '/home/mktxp/mktxp/mktxp.conf'

Having proper compatibility with Docker Swarm would be desired.

[akpw]

@FinlayDaG33k this is essentially forward compatibility-related: with new features in upcoming releases, there are also new settings in the mktxp.conf / _mktxp.conf files.

mktxp tries to automatically add those to existing installs using defaults, which obviously could be problematic under a read-only filesystem.

For Docker Swarm / compose systems, the easiest solution is just use the configs files with all settings explicitly set.
You can find examples of those here or in the mktxp-stack configs

[FinlayDaG33k]

I see.
Would it maybe be helpful to state this matter in the documentation for people that run into the same issue?

[akpw]

@FinlayDaG33k sure it makes sense to mention in FAQ. I will at some point, or just feel free to do a PR in the meantime

[djieno]

Similar to above I got the error running the example from the main howto.

SOLVED
After adding the file mktxp/_mktxp.conf like in HERE it worked. I could go to the outputted http://host:port/metrics and see the metrics. Hope this might help someone

docker run -v "$(pwd)/mktxp:/home/mktxp/mktxp/" -p 49090:49090 -it --rm ghcr.io/akpw/mktxp:latest

Connecting to router [email protected] 2023-05-31 08:48:42 Connection to router [email protected] has been established 2023-05-31 08:48:42 Running HTTP metrics server on port 49090 Traceback (most recent call last): File "/usr/local/bin/mktxp", line 8, in <module> sys.exit(main()) ^^^^^^ File "/usr/local/lib/python3.11/site-packages/mktxp/cli/dispatch.py", line 108, in main MKTXPDispatcher().dispatch() File "/usr/local/lib/python3.11/site-packages/mktxp/cli/dispatch.py", line 30, in dispatch args = self.option_parser.parse_options() ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/mktxp/cli/options.py", line 72, in parse_options config_handler() File "/usr/local/lib/python3.11/site-packages/mktxp/cli/config/config.py", line 252, in __call__ self._create_os_path(self.mktxp_conf_path, File "/usr/local/lib/python3.11/site-packages/mktxp/cli/config/config.py", line 297, in _create_os_path shutil.copy(lookup_path, os_path) File "/usr/local/lib/python3.11/shutil.py", line 419, in copy copyfile(src, dst, follow_symlinks=follow_symlinks) File "/usr/local/lib/python3.11/shutil.py", line 258, in copyfile with open(dst, 'wb') as fdst: ^^^^^^^^^^^^^^^ **PermissionError: [Errno 13] Permission denied: '/home/mktxp/mktxp/_mktxp.conf'**