Docker 6 - Error Docker Compose in Linux

Error Message

• The error message is displayed when I tried to start a docker container that uses the port 5432, but the port is already in use.

ERROR: for <APP-NAME>  Cannot start service postgres: driver failed programming external connectivity on endpoint <APP-NAME> (6469a63bb19d545db5b2b3852cb5704e8065d0ae1e71fead778d14a8cac39299): Error starting userland proxy: listen tcp4 0.0.0.0:5432: bind: address already in use

ERROR: for postgres  Cannot start service postgres: driver failed programming external connectivity on endpoint <APP-NAME> (6469a63bb19d545db5b2b3852cb5704e8065d0ae1e71fead778d14a8cac39299): Error starting userland proxy: listen tcp4 0.0.0.0:5432: bind: address already in use

Solution

• To get the process id of the process that is using the port 54, use the following command:

sudo ss -lptn 'sport = :5432'

• You will need to input your sudo password to run the command.
• The output will look like this:

State                             Recv-Q                            Send-Q                                                       Local Address:Port                                                       Peer Address:Port                            Process
LISTEN                            0                                 200                                                              127.0.0.1:5432                                                            0.0.0.0:*                                users:(("postgres",pid=934,fd=6))

• Then use the following command to kill the process:

sudo fuser -k 5432/tcp

• The output will look like this:

5432/tcp:              934

• Then check if the port is free:

sudo ss -lptn 'sport = :5432'

• If you see this output, then the port is free:

State                            Recv-Q                            Send-Q                                                       Local Address:Port                                                        Peer Address:Port                            Process