stack-cmd.sh

#!/bin/bash

# Commands to bring the sciforge stack up
# Reads in env vars that need to be in linux env before docker-compose commands run, and brings stack up, down, etc
# Available Commands
# 	up: bring all services up
# 	down: bring all services down

#Import Yaml parser
. yamlparse.sh

shopt -s nocasematch

# exit when any command fails
set -e

trim() {
    local var="$*"
    # remove leading whitespace characters
    var="${var#"${var%%[![:space:]]*}"}"
    # remove trailing whitespace characters
    var="${var%"${var##*[![:space:]]}"}"
    printf '%s' "$var"
}

read_var() {
    #Bug fix note -- Line 29 will fail if the param $2(.env file) contains a line that both contains param $1 and has a ' or " in it.
    #Recommended fix     VAR=$(grep $1 $2 | xargs -0)
    VAR=$(grep $1 $2 | xargs)
    IFS="=" read -ra VAR <<< "$VAR"
    echo $(trim ${VAR[1]})
}

doDockerStuff() {
  
  if [ "$#" -lt "3" ]; then
    echo "inadequate parameters for doDockerStuff.  Expect args of action(up, down), primary service name, and path to docker-compose.yml."
  	exit 1
  fi

  local lclACTION=$1
  local lclINSTANCE=$2
  local lclCOMPOSE_PATH=$3
  local lclMAIN_SERVICE=$4

  echo "working on docker stuff"
  
  export lclCOMPOSE_FILE="${lclCOMPOSE_PATH}/docker-compose.yml"
  
  echo $lclCOMPOSE_FILE  
  
  if [ "$lclACTION" == "down" ]; then
    echo "Bring it down"
    docker stack rm $lclMAIN_SERVICE
  fi
  
  if true ; then
    
    if [ "$lclACTION" == "up" ]; then
      # Use YamlParser to get volumes
      build_volumes "$SITE"

      # Setup docker registry
      if [ -z "$(docker service ls -q -f name=registry)" ]; then
        echo "Creating registry service"
        docker service create --name registry --publish published=5000,target=5000 registry:2
      fi

      docker compose build
      docker compose push

      # Create Docker registry
      env $(cat .env | grep ^[A-Z] | xargs) docker stack deploy --compose-file docker-compose.yml $lclMAIN_SERVICE
    fi

    else
      if [ "$lclACTION" != "down" ]; then
        echo "$lclMAIN_SERVICE needs to be brought down in order to pull updates or bring dockers up"
      fi
    fi
}

# STARTUP CHECKS
if [ ! -f ".env" ]; then
	echo "Environment file not present, exiting"
	exit 1
fi

if [ "$#" -eq "0" ]; then
  echo "A command line argument is required.  Valid commands are up, down."
  exit 1
fi

# VAR INITIATION
ACTION="$1"

# Export all variables from .env
set -a
source .env
set +a

SANITIZED_SITE=$(echo "$SITE" | tr '.' '-')

doDockerStuff "$ACTION" "$SITE" "." "$SANITIZED_SITE"