Dockerized Mongo Memory Server

[higherorderfunctor]

Versions

• system: Alpine Edge

package: mongo-memory-server

What is your question?

This is less a question, but instead sharing a hacky wrapper for starting the memory server inside docker when on a host that doesn't have any recent mongo builds (e.g. alpine edge). You may have to increase your timeouts if using a testing suite as the startup time is slower. The container will auto-kill itself after 60 seconds in case the scripts exits from some signal I didn't trap.

mongod

#!/bin/bash

PORT=27107
BIND_IP="127.0.0.1"

args=()
while (( "$#" )); do
  case "$1" in
    --dbpath) # strip since running in own container
      if [ -n "$2" ] && [ ${2:0:1} != "-" ]; then
        shift 2
      else
        echo "Error: Argument for $1 is missing" >&2
        exit 1
      fi
      ;;
    --bind_ip) # strip to use as part of docker run
      if [ -n "$2" ] && [ ${2:0:1} != "-" ]; then
        BIND_IP=$2
        shift 2
      else
        echo "Error: Argument for $1 is missing" >&2
        exit 1
      fi
      ;;
    --port) # extract but don't strip to setup proper port forwarding
      if [ -n "$2" ] && [ ${2:0:1} != "-" ]; then
        PORT=$2
        args+=($1 $2)
        shift 2
      else
        echo "Error: Argument for $1 is missing" >&2
        exit 1
      fi
      ;;
    *)
      args+=($1)
      shift
      ;;
  esac
done

trap term SIGTERM INT

function term() {
  kill "$child"
  exit 0
}

docker run --rm -p $BIND_IP:$PORT:$PORT mongo:latest timeout 60s mongod --bind_ip 0.0.0.0 ${args[@]} & child=$!
wait "$child"

In the test script, I use something like the following to use the bash script:

if (process.env.DOCKERIZED_MONGOMS) {
  process.env.MONGOMS_DISABLE_POSTINSTALL = '1'
  process.env.MONGOMS_SYSTEM_BINARY = '/path/to/mongod;
}

You can then switch to using the dockerized memory server by running tests like so:

DOCKERIZED_MONGOMS=1 yarn test

[hasezoey]

closing in favor of #347