docker-gen

docker-gen is a config file generator that uses templates to generate files using docker container meta-data.

This is can be used to generate config files for:

• fluentd, logstash or other centralized logging tools that tail the containers JSON log file.
• logrotate files to rotate container JSON log files
• nginx, haproxy, etc. reverse proxy configs to route requests from the host to containers

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Usage

go get github.com/jwilder/docker-gen

docker-gen
Usage: docker-gen [-config file] [-watch=false] [-notify="restart xyz"] <template> [<dest>]

Options:

• -watch - runs continuously and monitors docker container events. When containers are started or stopped, the template is regenerated.
• -notify - runs a command after the template is generated. Useful for restarting nginx, reloading haproxy, etc..
• -config file - Use the specified config file instead of command-line options. Multiple templates can be defined and they will be executed in the order that they appear in the config file.

If no <dest> file is specified, the output is send to stdout. Mainly useful for debugging.

Examples

Docker Log Management With Fluentd

Automated Nginx Reverse Proxy for Docker

TODO

• Add a way to filter out containers in templates
• Add a notify interval option