Change OpenStack Discoverer listen port for LivenessProve

[yutaokaz]

I tried to deploy OpenStack Discoverer, but failed to start it cause of conflict between Prometheus port and LivenessProve port. Error messages are below.

time="2018-08-22T02:48:33Z" level=info msg="Gimbal OpenStack Discoverer Starting up..."
time="2018-08-22T02:48:33Z" level=info msg="Version: v0.3.0-beta.3"
time="2018-08-22T02:48:33Z" level=info msg="Backend name: os01"
time="2018-08-22T02:48:33Z" level=info msg="Number of queue worker threads: 2"
time="2018-08-22T02:48:33Z" level=info msg="Reconciliation period: 30s"
time="2018-08-22T02:48:33Z" level=info msg="Gimbal kubernetes client QPS: 5"
time="2018-08-22T02:48:33Z" level=info msg="Gimbal kubernetes client burst: 10"
time="2018-08-22T02:48:33Z" level=info msg="BackendName is: os01"
time="2018-08-22T02:48:33Z" level=info msg="Using InCluster k8s config"
time="2018-08-22T02:48:33Z" level=warning msg="The OS_USER_DOMAIN_NAME environment variable was not set. Using \"Default\" as the OpenStack user domain name."
time="2018-08-22T02:48:33Z" level=debug msg="Request URL: https://<MY-OPENSTACK-SERVER>/v3/auth/tokens"
time="2018-08-22T02:48:33Z" level=debug msg="-- API Latency: 475"
time="2018-08-22T02:48:33Z" level=debug msg="-- Response Status: 201 Created"
time="2018-08-22T02:48:33Z" level=info msg="Starting reconciler"
time="2018-08-22T02:48:33Z" level=info msg="Listening for Prometheus metrics on port: 8080"
time="2018-08-22T02:48:33Z" level=fatal msg="listen tcp :8080: bind: address already in use"

My suggestion is to change port number for LivenessProve to another (not 8080) port.

Related: #202

Signed-off-by: yutaokaz yutaokaz@yahoo.co.jp

[stevesloka]

LGTM! Thanks for the PR @yutaokaz