Rancher registration URL domain replaces "http" with "ws" beyond first match

[nextrevision]

Rancher Version:
v1.2.0

Docker Version:
1.12.3

OS and where are the hosts located? (cloud, bare metal, etc):
Cloud (AWS)

Setup Details:
HA

Environment Type:
K8S

Steps to Reproduce:
Set Rancher server URL for host registration (under settings) to http://my-rancher-http-server.com and add a host (using either a docker-machine driver or custom command).

Results:
Upon launch of the agent, the agent appears to connect fine initially, but when attempting to connect over the websocket, it appears a string replacement is happening beyond the first match. For example, http://my-rancher-http-server.com turns into ws://my-rancher-ws-server.com.

Agent logs:

Found container ID: b5fe9cc1c3bc950c169108e2b88b5469cae6f5c804ccba7b0ac6b16126e3f007
Checking root: /host/run/runc
Checking file: 0903c32443ba593ad5ef597e5d2a2d4fbb9b2c335fc94801c852042784716e1d
Checking file: 120006ae9e14db5ffcee921782f1463abeaec37497e51c1e12285a12afbd505e
Checking file: 27e36982026b647159d0a5fafe5d857572697ae805df7c0e889caa2c0e8abf55
Checking file: 2ad778eb1bcebb39b4c8951ea2172772fe47b90e82310711ec45335a1e710d46
Checking file: 38c58bfe32c37f5e599261f31741870b60750740d52e70284b55d6b72682c734
Checking file: 3b9e1ab9cb48c40d4d171f1424166b5fee1cc1ce5965085fed5d6c32d3ff1573
Checking file: 9e605c157ac9dc1fd2bf8e673ef38a66a2f5ef7b5e35dc0c2bead1207a80d255
Checking file: b5fe9cc1c3bc950c169108e2b88b5469cae6f5c804ccba7b0ac6b16126e3f007
Found state.json: b5fe9cc1c3bc950c169108e2b88b5469cae6f5c804ccba7b0ac6b16126e3f007
time="2016-12-06T21:25:55Z" level=info msg="Execing [/usr/bin/nsenter --mount=/proc/1520/ns/mnt -F -- /var/lib/docker/overlay/6377a06ca053ad8edb9302ed32cbd596e7d221291f73160108dcebd3559cdc16/merged/usr/bin/share-mnt --stage2 /var/lib/rancher/volumes /var/lib/kubelet -- norun]"
Found container ID: b5fe9cc1c3bc950c169108e2b88b5469cae6f5c804ccba7b0ac6b16126e3f007
Checking root: /run/runc
Checking file: 0903c32443ba593ad5ef597e5d2a2d4fbb9b2c335fc94801c852042784716e1d
Checking file: 120006ae9e14db5ffcee921782f1463abeaec37497e51c1e12285a12afbd505e
Checking file: 27e36982026b647159d0a5fafe5d857572697ae805df7c0e889caa2c0e8abf55
Checking file: 2ad778eb1bcebb39b4c8951ea2172772fe47b90e82310711ec45335a1e710d46
Checking file: 38c58bfe32c37f5e599261f31741870b60750740d52e70284b55d6b72682c734
Checking file: 3b9e1ab9cb48c40d4d171f1424166b5fee1cc1ce5965085fed5d6c32d3ff1573
Checking file: 9e605c157ac9dc1fd2bf8e673ef38a66a2f5ef7b5e35dc0c2bead1207a80d255
Checking file: b5fe9cc1c3bc950c169108e2b88b5469cae6f5c804ccba7b0ac6b16126e3f007
Found state.json: b5fe9cc1c3bc950c169108e2b88b5469cae6f5c804ccba7b0ac6b16126e3f007
INFO: Starting agent for 235ADC13DB797D6CB6D5
INFO: Access Key: 235ADC13DB797D6CB6D5
INFO: Config URL: http://internal-rancher-ha-elb-http-int-1786148355.us-east-1.elb.amazonaws.com/v1
INFO: Storage URL: http://internal-rancher-ha-elb-http-int-1786148355.us-east-1.elb.amazonaws.com/v1
INFO: API URL: http://internal-rancher-ha-elb-http-int-1786148355.us-east-1.elb.amazonaws.com/v1
INFO: IP: 192.168.99.201
INFO: Port:
INFO: Required Image: rancher/agent:v1.1.0
INFO: Current Image: rancher/agent:v1.1.0
INFO: Using image rancher/agent:v1.1.0
INFO: Downloading agent http://internal-rancher-ha-elb-http-int-1786148355.us-east-1.elb.amazonaws.com/v1/configcontent/configscripts
INFO: Updating configscripts
INFO: Downloading http://internal-rancher-ha-elb-http-int-1786148355.us-east-1.elb.amazonaws.com/v1//configcontent//configscripts current=
INFO: Running /var/lib/cattle/download/configscripts/configscripts-1-f0f3fb2e1110b5ada7c441705981f93a480313a324294321cff467f0c3e12319/apply.sh
INFO: Sending configscripts applied 1-f0f3fb2e1110b5ada7c441705981f93a480313a324294321cff467f0c3e12319
INFO: Updating pyagent
INFO: Downloading http://internal-rancher-ha-elb-http-int-1786148355.us-east-1.elb.amazonaws.com/v1//configcontent//pyagent current=
INFO: Running /var/lib/cattle/download/pyagent/pyagent-1-9e3dcab12585149a65d818082279708965cd826df1937a55b24f48428f8f0c0644fc1033b5be15c88dcf9540b1c04c67/apply.sh
INFO: Updating host-api
INFO: Downloading http://internal-rancher-ha-elb-http-int-1786148355.us-east-1.elb.amazonaws.com/v1//configcontent//host-api current=
INFO: Running /var/lib/cattle/download/host-api/1-9608ead804f8cebbfe95b9f114701d8a5ac4244d603d196068043c902b1a0bdf/apply.sh
INFO: Sending host-api applied 1-9608ead804f8cebbfe95b9f114701d8a5ac4244d603d196068043c902b1a0bdf
INFO: Updating python-agent
INFO: Downloading http://internal-rancher-ha-elb-http-int-1786148355.us-east-1.elb.amazonaws.com/v1//configcontent//python-agent current=
INFO: Running /var/lib/cattle/download/python-agent/1-1ed5b002e1d3e9ac289af1d032dcdd3a98e2d291f14d66c90caca62c1477dcb8/apply.sh
INFO: Sending python-agent applied 1-1ed5b002e1d3e9ac289af1d032dcdd3a98e2d291f14d66c90caca62c1477dcb8
INFO: Sending pyagent applied 1-9e3dcab12585149a65d818082279708965cd826df1937a55b24f48428f8f0c0644fc1033b5be15c88dcf9540b1c04c67
INFO: Starting agent /var/lib/cattle/pyagent/apply.sh
INFO: Executing /var/lib/cattle/pyagent/agent
INFO: Updating host-config
INFO: Downloading http://internal-rancher-ha-elb-http-int-1786148355.us-east-1.elb.amazonaws.com/v1//configcontent//host-config current=
INFO: Running /var/lib/cattle/download/host-config/host-config-1-aa8a313026603a5be3dca9729810d6f8404da21a1855830ff4276f23de161092/apply.sh
INFO: HOME -> ./
INFO: HOME -> ./etc/
INFO: HOME -> ./etc/cattle/
INFO: HOME -> ./etc/cattle/api.crt
INFO: Sending host-config applied 1-aa8a313026603a5be3dca9729810d6f8404da21a1855830ff4276f23de161092
time="2016-12-06T21:25:56Z" level=info msg="Launching agent"
time="2016-12-06T21:25:56Z" level=info msg="Listening for events on http://internal-rancher-ha-elb-http-int-1786148355.us-east-1.elb.amazonaws.com/v1"
time="2016-12-06T21:25:56Z" level=info msg="launching hostapi"
time="2016-12-06T21:25:56Z" level="info" msg="Starting event router."
time="2016-12-06T21:25:56Z" level=info msg="Initializing event router" workerCount=50
time="2016-12-06T21:25:56Z" level=error msg="Error subscribing to events: dial tcp: lookup internal-rancher-ha-elb-ws-int-1786148355.us-east-1.elb.amazonaws.com on 169.254.169.253:53: no such host" subscribeUrl="ws://internal-rancher-ha-elb-ws-int-1786148355.us-east-1.elb.amazonaws.com/v1/subscribe?eventNames=compute.instance.deactivate&eventNames=compute.instance.force.stop&eventNames=compute.instance.inspect&eventNames=compute.instance.pull&eventNames=storage.volume.activate&eventNames=compute.instance.activate&eventNames=compute.instance.remove&eventNames=storage.image.activate&eventNames=storage.volume.remove&eventNames=ping&eventNames=config.update"
time="2016-12-06T21:25:56Z" level=fatal msg="Exiting. Error: dial tcp: lookup internal-rancher-ha-elb-ws-int-1786148355.us-east-1.elb.amazonaws.com on 169.254.169.253:53: no such host"

Expected:
Only the protocol to change from http:// to ws://.

[vincent99]

Fixed in event-subscriber, but needs to be updated in agent.

[galal-hussein]

Rancher version: v1.2.1-rc2

I tested adding hosts to a rancher server with domain name that contain http, and the host registered successfully.