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README.md

Docker container of modoh-server

Environment Variables

We have several container-specific environment variables, which doesn't relates the behavior of modoh-server.

  • HOST_USER (default: user): User name executing rpxy inside the container.
  • HOST_UID (default: 900): UID of HOST_USER.
  • HOST_GID (default: 900): GID of HOST_USER
  • LOG_LEVEL=debug|info|warn|error (default: info): Log level
  • LOG_TO_FILE=true|false (default: false): Enable logging to the log file /modoh/log/modoh-server.log using logrotate. You should mount /modoh/log via docker volume option if enabled. The log dir and file will be owned by the HOST_USER with HOST_UID:HOST_GID on the host machine. Hence, HOST_USER, HOST_UID and HOST_GID should be the same as ones of the user who executes the modoh-server container on the host.
  • DISABLE_OTEL: If explicitly set to true, --trace and --metrics are disabled in the execute option. (default: false)
  • OTEL_ENDPOINT: Set the gRPC endpoint of opentelemetry-collector. (default: http://localhost:4317 but no collector is contained in the modoh-server docker container.)
  • ENABLE_QRLOG: If explicitly set to true, query-response logging is enabled in the modoh-server. (default: false) The log file will be /modoh/log/qrlog.log in the container. Note that the log rotation is set as the modoh-server system log.

See ./docker-compose.yml for the detailed configuration of the above environment variables.

Volumes

At least, the configured config.toml file (or its contained directory) must be mounted:

  • case 1: only config.toml is directly mounted as /etc/modoh-server.toml. Then, the hot-reload function is disabled due to the limitation of docker.
  • case 2: path/to/config_dir/ containing config.toml is mounted as /modoh/config. Then modoh-server can tracks changes of the configuration file.

In addition to the configuration file/directory, the list of up-to-date CDN IP addresses should be mounted and set in the config.toml. See ../modoh-server.toml and ./docker-compose.yml.

You may also need to mount the log directory (/modoh/log).