port conflict issue due to rabbitmq dynamic ports allocation

[satvinder gill]

Hi Everyone,

we are facing port conflict issue while starting any docker container on Host as RabbitMQ is assigning below dynamic ports for internal communication , can you please help to get rid of this issue.

tcp        0      0 ::ffff:ContainerIP:5672 ::ffff:172.16.1.1:56090 ESTABLISHED -
tcp        0      0 ::ffff: ContainerIP  :5672 ::ffff:172.16.1.1:56084 ESTABLISHED -
tcp        0      0 ::ffff: ContainerIP  :5672 ::ffff:172.16.1.1:55968 ESTABLISHED -
tcp        0      0 ::ffff: ContainerIP  :5672 ::ffff:172.16.1.1:56098 ESTABLISHED -
tcp        0      0 ::ffff: ContainerIP  :5672 ::ffff:172.16.1.1:56094 ESTABLISHED -
tcp        0      0 ::ffff: ContainerIP  :5672 ::ffff:172.16.1.1:56080 ESTABLISHED -
tcp        0      0 ::ffff: ContainerIP  :5672 ::ffff:172.16.1.1:56072 ESTABLISHED -

[satvinder gill]

can anyone help here , i want ports should not be dynamically allocated , how we can control the ports which RabbitMQ is using internally 

[Michal Kuratczyk]

You barely explained what your concern is. As far as I can tell, there's no issue whatsoever - just a lack of understanding how TCP works.

Your connections are to port 5672, which is a well-known destination port that RabbitMQ listens on. 

You are probably worried about 56090 and the other high port numbers but these are source ports. They are supposed to be random (more or less).

If you expect further help, elaborate on the problem (if there's any).

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[x yang]

ip_local_reserved_ports - list of comma separated ranges. Specify the ports which are reserved for known third-party applications. These ports will not be used by automatic port assignments (e.g. when calling connect() or bind() with port number 0). Explicit port allocation behavior is unchanged.
So modify /proc/sys/net/ipv4/ip_local_reserved_ports may works.

[satvinder gill]

this didn't work , can you suggest any other solution