I have questions regarding docker installation of fiware-cygnus:
What docker image should I use, I found at least 3 of them(not sure if this affect installation) I have agent.conf on my host, and I was not able to map it to the container. So it could be me but is this location where I should map agent.conf? I had no problems to map my own grouping_rules.conf but agent.conf I was not able to do it, I run docker images/containers many times never had an issue like this.
/opt/apache-flume/conf/agent.conf
This is the main reason of my problems because file inside of docker-container simply won't change, even if I try to change it the manual moment I restart container it returns to the original state. 3. Do I need to configure cygnu_instance.conf, very confusing for me is the fact that in it mention agent.conf but on the different location, is that location I should map my agent.conf or not.
CONFIG_FOLDER=/usr/cygnus/conf
CONFIG_FILE=/usr/cygnus/conf/agent.conf
These are the main questions/issues I have: If someone were able to install Cygnus with docker and with personal agent.conf or know where I should look and send me in some direction would help a lot.
Not fully sure, but of the 3 I think the one you need to work with Orion Context Broker (i.e. subscribing to Orion so it sends notifications to Cygnus) is cygnus-ngsi.
With regards to configuration, I think that the approach is not editing .conf files inside the docker container on execution. You should inject configuration as environment variables. The ENV marks in the Dockerfile mean configurabe parameters.
I guess that both docker run and docker-compose should allow to set environment variables to the container, but that's a docker generic question not directly related with this question. There should be a lot of literature out there about this :)