I am trying to make a container for consul and it keeps failing with this output, funny, I don't really think it is an error
Protocol 2 spoken by default, understands 2 to 3 (agent will automatically use protocol >2 when speaking to compatible agents)
following is the command I am using:
docker container run --net host --name consul-server -e 'CONSUL_LOCAL_CONFIG={"skip_leave_on_interrupt": true}' -e CONSUL_BIND_INTERFACE='eth0' consul agent -server -client 0.0.0.0 -dns-port 53 -bootstrap-expect 1 -ui -datacenter dc1 -v "/var/lib/consul:/consul/data" -data-dir /var/lib/consul
It is a single node fresh installation with latest version from registry, so there is no upgrade or version mismatch with any agent/client happening here.
Two things to fix. First, the -v volume argument must be for docker command, not for consul command. Move it to the right place:
docker container run -v "/consul/data:/var/lib/consul" -data-dir /var/lib/consul --net host --name consul-server -e 'CONSUL_LOCAL_CONFIG={"skip_leave_on_interrupt": true}' -e CONSUL_BIND_INTERFACE='eth0' consul agent -server -client 0.0.0.0 -dns-port 53 -bootstrap-expect 1 -ui -datacenter dc1
Also invert them (they are /host/dir:/container/dir)
Second, by default Consul can't listen to privileged ports (i.e. 53). See this: https://www.consul.io/docs/guides/forwarding.html, so remove the -dns-port 53 and implement any approach that they recommends:
docker container run -v "/consul/data:/var/lib/consul" -data-dir /var/lib/consul --net host --name consul-server -e 'CONSUL_LOCAL_CONFIG={"skip_leave_on_interrupt": true}' -e CONSUL_BIND_INTERFACE='eth0' consul agent -server -client 0.0.0.0 -bootstrap-expect 1 -ui -datacenter dc1
I recommend the DNSMasq setup, it is easy to implement.