Hello,
I'm trying to figure out how to get 2.4-SNAPSHOT going with Docker such
that 1) I can access akka+http outside the running Docker container (i.e.
from the host), and 2) I can enable clustering/discovery.
I see from discussion threads and docs that the new bind-hostname and
bind-port are designed to do this, but I haven't been able to come up with
the right recipe to use them yet.
My code passes these arguments when Docker starts up:
- IP address of host machine
- port for Akka on host
- http port
Like this:
docker run -i -t -p 9100:9100 -p 9101:9101 localhost:5000/root:1.0.0 --seed
--name kernel --hostIP 172.16.240.78 --hostPort 9100 --httpPort 9101
--roles seed
(where 172.16.240.78 is the IP of my host running Docker)
Here's my application.conf.
akka {
loglevel = "ERROR"
stdout-loglevel = "ERROR"
event-handlers = ["akka.event.slf4j.Slf4jEventHandler"]
log-dead-letters = 1
log-dead-letters-during-shutdown = off
actor {
provider = "akka.cluster.ClusterActorRefProvider"
}
remote {
enabled-transports = ["akka.remote.netty.tcp"]
netty.tcp {
# Outside Docker addr
bind-hostname = ${server.ip} # hostIP param
bind-port = ${server.port} # hostPort param
# Inside Docker addr
port = 0
}
}
cluster {
auto-down = on
log-info = off
# seed-nodes and roles set at runtime and added to config
}
}
I'm not sure I'm using these hostname/port, bind-hostname, bind-port
correctly. I've tried a few different permutations, which either fail to
launch (w/messages saying it can't bind to an address) or it runs but I
can't hit it outside my Docker container.
I need Akka to be able to discover its cluster nodes and be accessible on
the given IP addr/port.
I have a trivial project set up here to show the approach:
https://github.com/gzoller/docker-exp/tree/akk2
I'm hoping I'm missing something simple in my config...
Any ideas?
Thanks!
Greg
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