Restore from a server image that contain discourse, but rebuild error

#1

I backup a server image which discourse runs smoothly, and then restore on a new server with the backup, but when I rebuild app from discourse directory, it always gets a error to access git, the message is:

"cd /pups && git pull && /pups/bin/pups --stdin

fatal: unable to access ‘https://github.com/discourse/pups.git/’: Could not resolve host: github.com"

By the way, the network has no problem that I can access github, I wonder there’s a configuration contains the old server’s ip address in discourse, but I can’t find it

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#2

The host network has no problem, but the Docker one is busted.

Last week someone complained with a similar bug and the docker network wasn’t able to connect to the DHCP provided DNS, and setting it to a public DNS (like 8.8.8.8) solved it.

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#4

I have change the nameserver in resolv.conf and hosts, but it doesn’t work

#5

Which resolve.conf? The docker container or the host?

Can the docker container ping that IP? If ICMP doesn’t reach it then UDP won’t.

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#6

I don’t know which one to configure