docker-dkron

Docker image for Dkron

More info http://dkron.io

How to use this image

start a Dkron instance

$ docker run --name some-dkron -d dkron/dkron agent -server

This image includes EXPOSE 8080 8946, so standard container linking will make it automatically available to the linked containers (as the following examples illustrate).

AWS ECS support

When running under AWS ECS the EC2_JOIN env variable is exported and contains the --join options to automatically join other dkron instances. EC2 instances hosting a dkron daemon should be marked by the dkron tag, setting its value to member. The target tag can be customized via the AWS_TAG env variable (default: dkron=member).

ECS runner

This image contains a script located at /usr/local/bin/ecs-run which will help you to run scripts through docker images deployed on AWS ECS. You can use it to schedule ecs-powered task just setting ecs-run as a dkron job command.

ecs-run usage

Required arguments:
    -d | --task-definition       Name of task definition to deploy
    -c | --cluster               Name of ECS cluster
    -n | --container-name        Name of Docker container

Optional arguments:
    -m | --command
    --aws-instance-profile  Use the IAM role associated with this instance
    -D | --desired-count    The number of instantiations of the task to place.
    -t | --retries          Default is 12 for two hours. Script monitors ECS Service for new task definition to be running.
    -e | --tag-env-var      Get image tag name from environment variable. If provided this will override value specified in image name argument.
    -v | --verbose          Verbose output
    -r | --region           AWS Region
    -p | --profile          AWS Profile to use

Examples:
  Simple deployment of a service (Using env vars for AWS settings):
    ecs-run -c production1 -d foo-taskdef -n foo-container -m "sleep,15"