On a ubunty 1404 machine, docker-proxy is using port 6379, however there are no docker containers running.
$ sudo netstat -tulpn | grep docker tcp6 0 0 :::6379 :::* LISTEN 28438/docker-proxytcp6 0 0 :::2376 :::* LISTEN 28266/dockerd$ docker ps -allCONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES$After I stop docker service, this process is gone, and that port is available, however when I start docker back up, docker-proxy is still using that port even though there are no docker containers running.
$ docker info## Output:Containers: 0 Running: 0 Paused: 0 Stopped: 0Images: 0Server Version: 1.12.0Storage Driver: aufs Root Dir: /var/lib/docker/aufs Backing Filesystem: extfs Dirs: 0 Dirperm1 Supported: trueLogging Driver: json-fileCgroup Driver: cgroupfsPlugins: Volume: local Network: bridge null host overlaySwarm: inactiveRuntimes: runcDefault Runtime: runcSecurity Options: apparmorKernel Version: 4.2.0-38-genericOperating System: Ubuntu 14.04.4 LTSOSType: linuxArchitecture: x86_64CPUs: 16Total Memory: 31.32 GiBName: xxxxxID: LILE:5WFT:2EPL:OXCN:GZG7:C4WE:AFCX:LNAT:TBMG:XQFP:QX7W:XLYKDocker Root Dir: /var/lib/dockerDebug Mode (client): falseDebug Mode (server): falseRegistry: https://index.docker.io/v1/WARNING: No swap limit supportInsecure Registries: 127.0.0.0/8