entrypoint.sh

#!/bin/bash
set -e

# Add local user
# Either use the LOCAL_USER_ID if passed in at runtime or
# fallback

USER_ID=${LOCAL_USER_ID:-9001}
GRP_ID=${LOCAL_GRP_ID:-9001}
ZEN_HOME="/mnt/zen"

getent group user > /dev/null 2>&1 || groupadd -g $GRP_ID user
id -u user > /dev/null 2>&1 || useradd --shell /bin/bash -u $USER_ID -g $GRP_ID -o -c "" -m user

LOCAL_UID=$(id -u user)
LOCAL_GID=$(getent group user | cut -d ":" -f 3)

if [ ! "$USER_ID" == "$LOCAL_UID" ] || [ ! "$GRP_ID" == "$LOCAL_GID" ]; then
  echo "Warning: User with differing UID "$LOCAL_UID"/GID "$LOCAL_GID" already exists, most likely this container was started before with a different UID/GID. Re-create it to change UID/GID."
fi

echo "Starting with UID/GID : "$(id -u user)"/"$(getent group user | cut -d ":" -f 3)

export HOME=/home/user

#Must have a zen config file
if [ ! -f "$ZEN_HOME/config/zen.conf" ]; then
  echo "No config found. Exiting."
  exit 1
else
  if [ ! -L $HOME/.zen ]; then
    ln -s $ZEN_HOME/config $HOME/.zen > /dev/null 2>&1 || true
  fi
fi

#zcash-params can be symlinked in from an external volume or created locally
if [ -d "$ZEN_HOME/zcash-params" ]; then
  if [ ! -L $HOME/.zcash-params ]; then
    echo "Symlinking external zcash-params volume..."
    ln -s $ZEN_HOME/zcash-params $HOME/.zcash-params > /dev/null 2>&1 || true
  fi
else
  echo "Using local zcash-params folder"
  mkdir -p $HOME/.zcash-params > /dev/null 2>&1 || true
fi

#data folder can be an external volume or created locally
if [ ! -d "$ZEN_HOME/data" ]; then
  echo "Using local data folder"
  mkdir -p $ZEN_HOME/data > /dev/null 2>&1 || true
else
  echo "Using external data volume"
fi

#link the secure node tracker config, bail if not present
#ls -lahR $ZEN_HOME/config
if [ -f "$ZEN_HOME/config/sec_tracker_config/stakeaddr" ]; then
  echo "Secure node config found OK - linking..."
  ln -s $ZEN_HOME/config/sec_tracker_config $ZEN_HOME/secnodetracker/config > /dev/null 2>&1 || true
else
  echo "No secure node config found. exiting"
  exit 1
fi

#Copy in any additional SSL trusted CA
if [ -d "$ZEN_HOME/config/root_certs" ]; then
  echo "Copying additional trusted root SSL certificates..."
  cp $ZEN_HOME/config/root_certs/* /usr/local/share/ca-certificates/ > /dev/null 2>&1 || true
  update-ca-certificates
fi

# Fix ownership of the created files/folders
chown -R user:user $HOME $HOME/.zcash-params $ZEN_HOME/zcash-params $ZEN_HOME

#Fetch zcash params before startup
/usr/local/bin/gosu user $ZEN_HOME/zcutil/fetch-params.sh


if [[ "$1" == start_secure_node ]]; then
  echo "Starting up Zen Daemon..."
  /usr/local/bin/gosu user zend -pid=$(hostname).pid &
  sleep 15
  LEAVE=FALSE
  while [ "$LEAVE" = "FALSE" ]; do
    CONN="$(/usr/local/bin/gosu user zen-cli -conf=/home/user/.zen/zen.conf getconnectioncount 2>/dev/null|tr -d '\n')"
    if [ "$CONN" -eq "$CONN" ] 2>/dev/null; then
      # is an integer, let's exit from the loop
      LEAVE=TRUE
    else
      # not integer, let's stay in the loop until zend has started
      sleep 15; echo "Delaying Secure Node Tracker startup until zend has started..."
    fi
  done
  while [ "$(/usr/local/bin/gosu user zen-cli -conf=/home/user/.zen/zen.conf getconnectioncount 2>/dev/null|tr -d '\n')" -lt 8 ]; do
   sleep 5; echo "Delaying Secure Node Tracker startup until we have 8 connections..."
  done
  /usr/local/bin/gosu user zen-cli -conf=/home/user/.zen/zen.conf getblockcount 2>/dev/null|tr -d '\n' >/tmp/previousblockheight
  sleep 10
  while [ "$(cat /tmp/previousblockheight)" -lt "$(/usr/local/bin/gosu user zen-cli -conf=/home/user/.zen/zen.conf getblockcount 2>/dev/null|tr -d '\n')" ]; do
   /usr/local/bin/gosu user zen-cli -conf=/home/user/.zen/zen.conf getblockcount 2>/dev/null|tr -d '\n' >/tmp/previousblockheight
   sleep 10; echo "Delaying Secure Node Tracker startup until the blockheight stops increasing..."
  done
  rm /tmp/previousblockheight 2>/dev/null
  echo "Starting up Secure Node Tracker..."
  cd $ZEN_HOME/secnodetracker
  UV_THREADPOOL_SIZE=64 node app.js &
  
# Wait 1 minute before start checking the processes status
  sleep 60
# Check if zend is still running or not. If not then exit entrypoint.sh with error code, which indicates docker to restart the container
# If the secnodetracker is not running then just start it
  while true; do 
	if ! [ -e /tmp/do_not_monitor_zend ]; then
	  	#if ! [ -e /mnt/zen/data/$(hostname).pid ]; then echo "pid file missing -> Let's stop the container..."; exit 1;
	  	#elif ! [ -e /proc/$(cat /mnt/zen/data/$(hostname).pid) ]; then echo "zend is not running -> Let's stop the container..."; exit 1; fi
		# We are restarting zend instead of stopping the whole container:
		if ! [ -e /mnt/zen/data/$(hostname).pid ]; then echo "zend pid file missing -> Let's start zend..."; /usr/local/bin/gosu user zend -pid=$(hostname).pid &
	  	elif ! [ -e /proc/$(cat /mnt/zen/data/$(hostname).pid) ]; then echo "zend is not running -> Let's start it..."; /usr/local/bin/gosu user zend -pid=$(hostname).pid & fi
	fi
	if ! $(ps -ef|grep -v grep|grep -q 'node app.js'); then echo "Secure Node Tracker is not running -> Let's start it..."; UV_THREADPOOL_SIZE=64 node app.js & fi
	sleep 20
  done
else
  echo "Runnning command: $@"
  exec /usr/local/bin/gosu user "$@"
fi