dragonfly manager connection leak

[daijiezou]

Bug report:

dragonfly manager number of links continues to rise, with no downward trend.I suspect there's been a connection leak

Expected behavior:

How to reproduce it:

Environment:

• Dragonfly version:2.1.30
• OS:
• Kernel (e.g. uname -a):
• Others:

[gaius-qi]

@daijiezou Has the number of peer nodes increased?

[daijiezou]

@daijiezou Has the number of peer nodes increased?

Recently we went live with a new cluster, adding one peer and two seedpeers.When I tried topreheat image for this new cluster, the number of connections to dragonfly manager started to rise.
This is the number of connections we monitored for dragonfly manager.

[daijiezou]

After I turned off the preheat image, this upward trend stopped, but the number of connections did not start to fall.

[daijiezou]

I looked at the connections and found that they were almost always between docker-registry(port 32402) and registry-authServer(port 32612).