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Dataplane exits at startup if config file does not exist #403

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Dataplane exits at startup if config file does not exist#403

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ema-pe

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on Apr 21, 2026

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I noticed that when I start the dataplaneapi for the first time, if the default dataplaneapi.yaml config file is not found (or doesn't exist), the program creates a new one. However after that it still doesn't start serving the Data Plane API immediately. I have to restart it once more for it to actually start serving. See the logs below. Is this intended behavior?

$ dataplaneapi \
          --host 0.0.0.0 \                                                                                                                                              
          --port 5555 \                                                                                                                                                 
          --log-level info \                                                                                                                                            
          --master-runtime /usr/local/etc/haproxy/config/haproxy-master.sock \                                                                                          
          --userlist dataplaneapi \                                                                                                                                     
          --config-file /usr/local/etc/haproxy/config/haproxy.cfg \                                                                                                     
          --reload-cmd "pkill -SIGUSR2 haproxy" \                                                                                                                       
          --restart-cmd "pkill -SIGUSR1 haproxy"
2026/04/07 11:04:10 maxprocs: Leaving GOMAXPROCS=6: CPU quota undefined                                                                                                 
2026/04/07 11:04:10 INFO memory is not limited, skipping package=github.com/KimMachineGun/automemlimit/memlimit                                                         
configuration file /etc/haproxy/dataplaneapi.yaml does not exists, creating one                                                                                         
time="2026-04-07T11:04:11Z" level=info msg="Build from: https://github.com/haproxytech/dataplaneapi.git"                                                                
time="2026-04-07T11:04:11Z" level=info msg="HAProxy Data Plane API v3.2.5 152e8a06"
time="2026-04-07T11:04:11Z" level=info msg="Build date: 2025-10-08T16:06:42Z"
time="2026-04-07T11:04:11Z" level=info msg="Reload strategy: custom"
$ # Again the same command...
2026/04/07 11:04:16 maxprocs: Leaving GOMAXPROCS=6: CPU quota undefined
2026/04/07 11:04:16 INFO memory is not limited, skipping package=github.com/KimMachineGun/automemlimit/memlimit
time="2026-04-07T11:04:17Z" level=info msg="HAProxy Data Plane API v3.2.5 152e8a06"
time="2026-04-07T11:04:17Z" level=info msg="Build date: 2025-10-08T16:06:42Z"
time="2026-04-07T11:04:17Z" level=info msg="Build from: https://github.com/haproxytech/dataplaneapi.git"
time="2026-04-07T11:04:17Z" level=info msg="Reload strategy: custom"
time="2026-04-07T11:04:18Z" level=info msg="Serving data plane at http://[::]:5555"
...

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