docker: drop docker-compose dependency

Instead of relying on docker-compose.yml, we use bash to pass
configuration to docker directly via commnad-line args.

We also use config template and prior each run we evaluate it
with current environment. So that settings like LND_GRPC_HOST
can be specified prior each run without a need to rebuild.

README.md

@@ -104,14 +104,17 @@ If you prefer to run the tool from a docker container:
 ```sh
 cd docker
 
-# review ./lndmanage/home/config_sample.ini
-# note that settings are relevant to situation inside the docker container
-# docker-compose.yml uses network_mode: host
-
 # build the container
 ./build.sh 
 
-# run lndmanage inside container via a wrapper script 
+# prior running the container you must specify LND_HOME or ADMIN_MACAROON_FILE and TLS_CERT_FILE
+export TLS_CERT_FILE=$HOME/.lnd/tls.cert
+export ADMIN_MACAROON_FILE=$HOME/.lnd/data/chain/bitcoin/mainnet/admin.macaroon  
+
+# you might want to specify LND_GRPC_HOST as well
+# look into _settings.sh for more details on container configuration
+
+# run lndmanage inside a container via this wrapper script: 
 ./lndmanage.sh status
 ```
 

docker/.gitignore

@@ -1,2 +1,3 @@
 lndmanage/_src
-_volumes
+_volumes
+.envrc

docker/_settings.sh

@@ -1,9 +1,29 @@
 #!/usr/bin/env bash
 
+# you have two possible ways how to specify ADMIN_MACAROON_FILE and TLS_CERT_FILE
+# 1. specify LND_HOME if it is located on your local machine, we use default paths from there
+# 2. specify env variables ADMIN_MACAROON_FILE and TLS_CERT_FILE
+
+# also you want to specify LND_GRPC_HOST if your node is remote
+# other config tweaks have to be done by changing lndmanage/home/config_template.ini
+
+# note: docker uses network_mode: host
 set -e -o pipefail
 
-export LND_HOME=${LND_HOME:-$HOME/.lnd}
+if [[ -z "$ADMIN_MACAROON_FILE" || -z "$TLS_CERT_FILE" ]]; then
+  if [[ -z "$LND_HOME" ]]; then
+    export LND_HOME="$HOME/.lnd"
+    echo "warning: LND_HOME is not set, assuming '$LND_HOME'"
+  fi
+fi
+
+export ADMIN_MACAROON_FILE=${ADMIN_MACAROON_FILE:-$LND_HOME/data/chain/bitcoin/mainnet/admin.macaroon}
+export TLS_CERT_FILE=${TLS_CERT_FILE:-$LND_HOME/tls.cert}
+export LND_GRPC_HOST=${LND_GRPC_HOST:-127.0.0.1:10009}
+
 export LNDMANAGE_SRC_DIR=${LNDMANAGE_SRC_DIR:-./..}
 export LNDMANAGE_CACHE_DIR=${LNDMANAGE_CACHE_DIR:-./_volumes/lndmanage-cache}
+export LNDMANAGE_AUX_DIR=${LNDMANAGE_AUX_DIR:-./_volumes/lndmanage-aux}
+export LNDMANAGE_VERBOSE=${LNDMANAGE_VERBOSE}
 
 PREFERRED_SHELL=${PREFERRED_SHELL:-fish}

docker/build.sh

@@ -16,5 +16,14 @@ rsync -a \
   "$LNDMANAGE_SRC_DIR" \
   lndmanage/_src
 
+cd lndmanage
+
 echo "Building lndmanage docker container..."
-exec docker-compose build "$@" lndmanage
+if [[ -n "$LNDMANAGE_VERBOSE" ]]; then
+  set -x
+fi
+exec docker build \
+  --build-arg LNDMANAGE_HOST_SRC_PATH=_src \
+  -t lndmanage:local \
+  "$@" \
+  .

docker/dc

@@ -1,7 +0,0 @@
-#!/usr/bin/env bash
-
-cd "$(dirname "${BASH_SOURCE[0]}")"
-
-. _settings.sh
-
-exec docker-compose "$@"

docker/docker-compose.yml

@@ -1,25 +0,0 @@
-# we have a really simple setup here
-# we use docker-compose only as a convenient way to specify docker build parameters via a yaml file
-# you could as well use Dockerfile directly with `docker build` and config passed via command-line args
-#
-# tips:
-#   - to run lndmanage from docker, you can use our wrapper script ./lndmanage.sh
-#   - see other scripts in this folder, also check the docker section in the main readme
-
-version: '3.7'
-
-services:
-
-  lndmanage:
-    image: lndmanage
-    container_name: lndmanage
-    command: ["run-service"]
-    network_mode: host
-    build:
-      context: ./lndmanage
-      dockerfile: Dockerfile
-      args:
-        - LNDMANAGE_HOST_SRC_PATH=_src
-    volumes:
-      - $LND_HOME:/root/.lnd
-      - $LNDMANAGE_CACHE_DIR:/root/lndmanage/cache

docker/inspect.sh

@@ -4,9 +4,8 @@ cd "$(dirname "${BASH_SOURCE[0]}")"
 
 . _settings.sh
 
-CONTAINER_ID=$(docker-compose ps -q lndmanage)
-if [[ -z $(docker ps -q --no-trunc | grep "$CONTAINER_ID") ]]; then
-  exec ./dc run --rm lndmanage ${PREFERRED_SHELL}
+if [[ $# -eq 0 ]]; then
+  exec ./lndmanage.sh inspect ${PREFERRED_SHELL}
 else
-  exec ./dc exec lndmanage ${PREFERRED_SHELL}
-fi
+  exec ./lndmanage.sh inspect "$@"
+fi

docker/lndmanage.sh

@@ -4,9 +4,34 @@ cd "$(dirname "${BASH_SOURCE[0]}")"
 
 . _settings.sh
 
-CONTAINER_ID=$(docker-compose ps -q lndmanage)
-if [[ -z $(docker ps -q --no-trunc | grep "$CONTAINER_ID") ]]; then
-  exec docker-compose run --rm lndmanage run-lndmanage "$@"
-else
-  exec docker-compose exec lndmanage run-lndmanage "$@"
-fi
+abs_path() {
+  echo "$(cd "$1"; pwd -P)"
+}
+
+if [[ ! -e "$LNDMANAGE_CACHE_DIR" ]]; then
+  mkdir -p "$LNDMANAGE_CACHE_DIR"
+fi
+LNDMANAGE_CACHE_DIR_ABSOLUTE=$(abs_path "$LNDMANAGE_CACHE_DIR")
+
+if [[ ! -e "$LNDMANAGE_AUX_DIR" ]]; then
+  mkdir -p "$LNDMANAGE_AUX_DIR"
+fi
+LNDMANAGE_AUX_DIR_ABSOLUTE=$(abs_path "$LNDMANAGE_AUX_DIR")
+
+# we use LNDMANAGE_AUX_DIR as ad-hoc volume to pass admin.macaroon and tls.cert into our container
+# it is mapped to /root/aux, config_template.ini assumes that
+cp "$ADMIN_MACAROON_FILE" "$LNDMANAGE_AUX_DIR/admin.macaroon"
+cp "$TLS_CERT_FILE" "$LNDMANAGE_AUX_DIR/tls.cert"
+
+if [[ -n "$LNDMANAGE_VERBOSE" ]]; then
+  set -x
+fi
+exec docker run \
+  --rm \
+  --network host \
+  -v "$LNDMANAGE_CACHE_DIR_ABSOLUTE:/root/lndmanage/cache" \
+  -v "$LNDMANAGE_AUX_DIR_ABSOLUTE:/root/aux" \
+  -e "LND_GRPC_HOST=${LND_GRPC_HOST}" \
+  -ti \
+  lndmanage:local \
+  run-lndmanage "$@"

docker/lndmanage/Dockerfile

@@ -42,5 +42,4 @@ COPY "$LNDMANAGE_HOST_SRC_PATH" .
 RUN pip install -r requirements.txt
 
 WORKDIR /root
-COPY "home" .
-RUN cp config_sample.ini lndmanage/config.ini
+COPY "home" .

docker/lndmanage/home/_shared.sh

@@ -1,5 +0,0 @@
-#!/usr/bin/env bash
-
-set -e -o pipefail
-
-SERVICE_PIPE=${SERVICE_PIPE:-/root/service.pipe}

docker/lndmanage/home/config_sample.ini

@@ -1,9 +0,0 @@
-# network settings
-[network]
-lnd_grpc_host = 127.0.0.1:10009
-# tls and admin macaroon can be found in .lnd folder
-tls_cert_file = /root/.lnd/tls.cert
-admin_macaroon_file = /root/.lnd/data/chain/bitcoin/mainnet/admin.macaroon
-
-[logging]
-loglevel = INFO

docker/lndmanage/home/config_template.ini

@@ -0,0 +1,8 @@
+[network]
+# see docker/build.sh
+lnd_grpc_host = ${LND_GRPC_HOST}
+tls_cert_file = /root/aux/tls.cert
+admin_macaroon_file = /root/aux/admin.macaroon
+
+[logging]
+loglevel = INFO

docker/lndmanage/home/run-lndmanage

@@ -2,15 +2,25 @@
 
 set -e -o pipefail
 
+# this is a special command to allow inspection on this container
+if [[ "$1" == "inspect" ]]; then
+  shift
+  exec "$@"
+fi
+
 cd "$(dirname "${BASH_SOURCE[0]}")"
 
-. _shared.sh
+eval_template() {
+  local template_file=$1
+  eval "cat <<TEMPLATE_EOF_MARKER
+$(<${template_file})
+TEMPLATE_EOF_MARKER
+" 2> /dev/null
+}
+
+# we dynamically prepare config from template by baking in env variables
+eval_template config_template.ini > lndmanage/config.ini
 
 cd lndmanage
 
-# report our action to the service if it is watching
-if [[ -p "$SERVICE_PIPE" ]]; then
-  echo "[$$] > ./lndmanage.py $@" > "$SERVICE_PIPE"
-fi
-
 exec ./lndmanage.py "$@"

docker/lndmanage/home/run-service

@@ -1,29 +0,0 @@
-#!/usr/bin/env bash
-
-set -e -o pipefail
-
-if [[ ! $# -eq 0 ]]; then
-  exec "$@"
-fi
-
-cd "$(dirname "${BASH_SOURCE[0]}")"
-
-. _shared.sh
-
-cd lndmanage
-
-echo "watching..."
-
-finish() {
-  rm -f "$SERVICE_PIPE"
-  echo "finishing..."
-}
-trap finish EXIT
-
-if [[ ! -p "$SERVICE_PIPE" ]]; then
-  mkfifo "$SERVICE_PIPE"
-fi
-
-while true; do
-  cat < "$SERVICE_PIPE"
-done