entrypoint.sh

#!/usr/bin/env bash

# This path is expected to be volume to make blockchain and accounts
# data persistent.
DATA_DIR=/root/.bitcoin

# This path is expected to have default data used to init environment
# at first deploy such as config and genesis.
DEFAULTS_DIR=/root/default

CONFIG=$DATA_DIR/bitcoin.conf

# If data directory doesn't exists this means that volume is not mounted
# or mounted incorrectly, so we must fail.
if [ ! -d $DATA_DIR ]; then
    echo "Data directory '$DATA_DIR' doesn't exists. Check your volume configuration."
    exit 1
fi

# We always restoring default config shipped with docker.
echo "Restoring default config"
cp $DEFAULTS_DIR/bitcoin.conf $CONFIG

# If we are using testnet set corresponding flag.
if [ $TESTNET -eq 1 ]; then
    TESTNET_OPT="-testnet"
fi

# If external IP defined when we need to set corresponding run option
if [ ! -z "$EXTERNAL_IP" ]; then
    echo "Setting external IP"
    EXTERNAL_IP_OPT="-externalip=$EXTERNAL_IP"
fi

# We are using `exec` to enable graceful shutdown of running daemon.
# Check http://veithen.github.io/2014/11/16/sigterm-propagation.html.
exec bitcoind \
-rpcauth=$BITCOIN_RPC_AUTH \
$TESTNET_OPT \
$EXTERNAL_IP_OPT