I have a rebar application called pingpong. After rebar generate I start the packaged application using ./rel/pingpong/bin/pingpong start. The problem is that the erlang VM always has the name -name pingpong@127.0.0.1 but what I want is to start the application once with the name ping@127.0.0.1 and then again with the name pong@127.0.0.1.
I know that the name stays in ./rel/pingpong/releases/VSN/vm.config but I don't want to manually edit the file before starting the application. I want something like pingpong start -name=ping. Is there a way to achieve this?
You can edit the bin/pingpong script to something like thist:
Instead of
NAME_ARG=`egrep -e '^-s?name' $RUNNER_ETC_DIR/vm.args`
set:
NAME_ARG=${NAME_ARG:-`egrep -e '^-s?name' $RUNNER_ETC_DIR/vm.args`}
in this way you will be able to override node name from the command line:
NAME_ARG="-name myname@localhost" bin/pingpong start
For console/start command:
Find a line in yout startup script:
CMD="$BINDIR/erlexec -boot $RUNNER_BASE_DIR/releases/$APP_VSN/$BOOTFILE -mode embedded -config $CONFIG_PATH -args_file $VMARGS_PATH"
Add $NAME_ARG at the end:
CMD="$BINDIR/erlexec -boot $RUNNER_BASE_DIR/releases/$APP_VSN/$BOOTFILE -mode embedded -config $CONFIG_PATH -args_file $VMARGS_PATH $NAME_ARG"
And don't forget to remove -name NAME from your .args files