Merge pull request #1 from lncm/dockerpatch

Add LND container control feature into the neutrino switcher

Dockerfile

@@ -1,6 +1,6 @@
 FROM alpine:3.10
 
-RUN apk add --no-cache curl jq bash
+RUN apk add --no-cache curl jq bash docker
 
 RUN mkdir /lnd/
 RUN mkdir /secrets/

README.md

@@ -8,16 +8,22 @@
 docker pull lncm/neutrino-switcher
 ```
 
+## If using docker-compose
+
+- Container name of LND needs to match the environment variable defined (if not lnd)
+
 ## Files/Folders it needs access to
 
 You may map these anywhere in your filesystem. For best results works best with a similar setup to [this one](https://github.com/lncm/thebox-compose-system)
 
 - /secrets/rpcpass.txt (Bitcoin RPC Password)
 - /lnd/lnd.conf (LND configuration. For best results write access please)
-- /statuses/ (Write access for notifying of changes to other scripts for now)
+- /statuses/ (Write access)
+- /var/run/docker.sock (is mapped correctly so it can restart the container)
 
 ## Environment Variables
 
 Other than that everything should be in the default paths.
 
 - JSONRPCURL (Default: http://10.254.2.2:8332) : Is the JSON-RPC interface for bitcoind
+- LND_CONTAINER_NAME (Default: lnd) : is the container name to restart

switch.sh

@@ -22,6 +22,11 @@ if [ -z $JSONRPCURL ]; then
     JSONRPCURL="http://10.254.2.2:8332"
 fi
 
+# if LND_CONTAINER_NAME doesn't exist then set it
+if [ -z $LND_CONTAINER_NAME ]; then
+    LND_CONTAINER_NAME="lnd"
+fi
+
 while true; do
   IS_NEUTRINO=`grep -c 'bitcoin.node=neutrino' /lnd/lnd.conf`
   if [ $IS_NEUTRINO -eq 1 ]; then
@@ -48,6 +53,16 @@ while true; do
               echo "Bitcoind has been switched across to neutrino"
               touch /statuses/node-status-bitcoind-ready
               sed -i 's/bitcoin.node\=neutrino/bitcoin.node\=bitcoind/g; ' /lnd/lnd.conf
+              echo "Attempting to Restarting LND"
+              if command -v docker &> /dev/null; then
+                # restart docker
+                docker stop $LND_CONTAINER_NAME
+                docker start $LND_CONTAINER_NAME
+              else
+                echo "Docker command doesn't exist, reverting config"
+                rm /statuses/node-status-bitcoind-ready
+                sed -i 's/bitcoin.node\=bitcoind/bitcoin.node\=neutrino/g; ' /lnd/lnd.conf
+              fi
           else
               echo "Node isn't full synched yet"
           fi