imp: align node oci scripts mode and custom mode defaults

nix/docker/context/bin/run-node

@@ -1,6 +1,4 @@
 #!/bin/env bash
-
-# https://vaneyckt.io/posts/safer_bash_scripts_with_set_euxo_pipefail
 set -eo pipefail
 
 echo "Running the cardano node ..."
@@ -16,12 +14,16 @@ if [[ -z $CARDANO_TOPOLOGY ]]; then
   CARDANO_TOPOLOGY="$CARDANO_CONFIG_BASE/mainnet/topology.json"
 fi
 
+# Breaking change from the historical default of: /opt/cardano/data
+# in order to align both the "scripts" and "custom" modes of image operation.
 if [[ -z $CARDANO_DATABASE_PATH ]]; then
-  CARDANO_DATABASE_PATH="/opt/cardano/data"
+  CARDANO_DATABASE_PATH="/opt/cardano/data/db"
 fi
 
+# Breaking change from the historical default of: /opt/cardano/ipc/socket
+# in order to align both the "scripts" and "custom" modes of image operation.
 if [[ -z $CARDANO_SOCKET_PATH ]]; then
-  CARDANO_SOCKET_PATH="/opt/cardano/ipc/socket"
+  CARDANO_SOCKET_PATH="/opt/cardano/ipc/node.socket"
 fi
 
 if [[ -z $CARDANO_LOG_DIR ]]; then
@@ -102,7 +104,12 @@ CARDANO_BLOCK_PRODUCER=$CARDANO_BLOCK_PRODUCER
 CNODE_HOSTNAME="$CARDANO_PUBLIC_IP"
 CNODE_PORT=$CARDANO_PORT
 CUSTOM_PEERS="$CARDANO_CUSTOM_PEERS"
+
+# Breaking change from the historical default of:
+# $CARDANO_CONFIG_BASE/mainnet-shelley-genesis.json in order to align
+# use of the by network organized configuration files.
 GENESIS_JSON="$CARDANO_CONFIG_BASE/mainnet/shelley-genesis.json"
+
 TOPOLOGY="$CARDANO_TOPOLOGY"
 LOG_DIR="$CARDANO_LOG_DIR"
 EOF

nix/docker/default.nix

@@ -144,17 +144,31 @@ in
     created = "now";
 
     extraCommands = ''
-      # These directories serve as defaults when the node docker container uses the `run` arg.
-      # Alternatively, when the NETWORK environment variable is set the defaults are different.
-      # TODO: Reduce the confusion on this.
-      mkdir -p opt/cardano/data
-      mkdir -p opt/cardano/ipc
-      mkdir -p opt/cardano/logs
+      # The "scripts" operation mode of this image, when the NETWORK env var is
+      # set to a valid network, will use the following default directories
+      # mounted at /:
+      mkdir -p data
+      mkdir -p ipc
+
+      # Similarly, make a root level dir for logs:
+      mkdir -p logs
+
+      # The "custom" operation mode of this image, when the NETWORK env is
+      # unset and `run` is provided as an entrypoint arg, will use the
+      # following default directories.  To reduce confusion caused by default
+      # directory paths varying by mode, symlink these directories to the
+      # "scripts" mode default directories at the root location.  This will
+      # permit use of volume mounts at the root directory location regardless
+      # of which mode the image is operating in.
+      mkdir -p opt/cardano
+      ln -sv /data opt/cardano/data
+      ln -sv /ipc opt/cardano/ipc
+      ln -sv /logs opt/cardano/logs
+
+      # Setup bins
       mkdir -p usr/local/bin
-
       cp -v ${runNetwork}/bin/* usr/local/bin
       cp -v ${context}/bin/* usr/local/bin
-
       ln -sv ${cardano-node}/bin/cardano-node usr/local/bin/cardano-node
       ln -sv ${cardano-cli}/bin/cardano-cli usr/local/bin/cardano-cli