You can either do that or simply use round-robin DNS with one server in Canada one server in France.

(Quote)

Use Level3's DNS servers?

Just keep in mind that all your DNS lookups are now sent over the Internet and to Google.

As others already pointed out most definitely a DNS issue.

Try different DNS servers for /etc/resolv.conf and what VIRT are you using?

first thought: dns

Check if you have a DNS server configured.

(Quote)

works well for these secnarios and set all my dns records for 5 mins. If anything is down for an hour, I move them to another server because my service level agreement says no down time for over 2 h

You may need to clear your DNS cache.

I use Cloudflare for my domain DNS and both the A and AAAA records for abigail.example.com point to the Kimsufi box.

Once Proxmox completes creating your CT, just select it and under the DNS tab remove the v4 DNS if you have a IPv6 only VPS and replace with Google's public DNS

I do not have a very good experience with this company , we ask them to set a reverse DNS our client and they returned the following answer :

Yeah, again, it depends on what you're trying to do. Backups and bring up a new machine could mean hours of downtime...even if you had another machine rsync'd constantly and just switched DNS it coul

(Quote)

From what I see, the dns works, that is not the problem.

for the containers you probably need to add ipv6 DNS just use google public dns, you can do it directly from the proxmox web gui

It means the dns works, are you sure you setup the IPs on the bridge and not on eth0?

5.Supports for binary slave DNS zones.