Upgrade DNS resolver error when updating CentminMod Code base

Please fill in any relevant information that applies to you:

• CentOS Version: CentOS 7 64bit ?
• Centmin Mod Version Installed: 123.09beta01
• Nginx Version Installed: default with 123.09beta01
  
• PHP Version Installed: 7.3.0
• MariaDB MySQL Version Installed: default with 123.09beta01
  
• When was last time updated Centmin Mod code base ? : That's now what error occurs.

Problem was found on my Hetzner Root server. Previously was fine, I've also tried a few times with this updating. Last night due to some reasons I reinstalled the OS completely. Then, today, when I was trying this, Centmin Menu 23 then option 1 or 3 (with option 2 it just worked fine), I got the bellow error:

Code:

--------------------------------------------------------
        Centmin Mod Updater Sub-Menu             
--------------------------------------------------------
1). Setup Centmin Mod Github Environment
2). Update Centmin Mod Current Branch
3). Update Centmin Mod Newer Branch
4). Exit
--------------------------------------------------------
Enter option [ 1 - 4 ] 3
--------------------------------------------------------
Error: there seems to be an issues with local DNS resolvers /etc/resolv.conf
       or internet connectivity on server
ping -c4 github.com
PING github.com (192.30.253.113) 56(84) bytes of data.
64 bytes from lb-192-30-253-113-iad.github.com (192.30.253.113): icmp_seq=1 ttl=53 time=93.3 ms
64 bytes from lb-192-30-253-113-iad.github.com (192.30.253.113): icmp_seq=2 ttl=53 time=93.4 ms
64 bytes from lb-192-30-253-113-iad.github.com (192.30.253.113): icmp_seq=3 ttl=53 time=93.3 ms
64 bytes from lb-192-30-253-113-iad.github.com (192.30.253.113): icmp_seq=4 ttl=53 time=93.4 ms

--- github.com ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3004ms
rtt min/avg/max/mdev = 93.351/93.381/93.412/0.026 ms
ping -c4 raw.githubusercontent.com
PING github.map.fastly.net (151.101.112.133) 56(84) bytes of data.
64 bytes from 151.101.112.133 (151.101.112.133): icmp_seq=1 ttl=60 time=4.91 ms
64 bytes from 151.101.112.133 (151.101.112.133): icmp_seq=2 ttl=60 time=4.94 ms
64 bytes from 151.101.112.133 (151.101.112.133): icmp_seq=3 ttl=60 time=4.96 ms
64 bytes from 151.101.112.133 (151.101.112.133): icmp_seq=4 ttl=60 time=4.93 ms

--- github.map.fastly.net ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3004ms
rtt min/avg/max/mdev = 4.910/4.939/4.967/0.020 ms

I don't get it. It said there was issue with local DNS resolver, but then, the two ping tests did resolve without problem.

I also tried to add 8.8.8.8 to /etc/resolv.conf. It didn't help. What's worse, it added like 3-5 seconds delay for a domain resolve. So I then changed back to the original resolv.conf.

Please, does anyone have idea, what the problem would be?

Many Thanks!
Damian

---

 

Tried again today. Still with no luck. I tried shutting down Hetzner's root firewall as well, as previously there were some problems like curl/wget couldn't work were caused by root firewall settings. However, it didn't work either. Have no idea now. As Menu 23 Option 2 works every time.

 

Yep. Everything is fine with option 23 submenu option 2. Wired. So, bellow are the outputs you may need:

Code:

# cat /etc/resolv.conf
### Hetzner Online GmbH installimage
# nameserver config
nameserver 213.133.98.98
nameserver 213.133.100.100
nameserver 213.133.99.99
nameserver 2a01:4f8:0:1::add:9999
nameserver 2a01:4f8:0:1::add:9898
nameserver 2a01:4f8:0:1::add:1010

Code:

# awk '/nameserver/ {print $0}' /etc/resolv.conf | awk 'NR==1 {print $2}'
nameserver

Code:

[13:08][root@hz /]# LOCALDNS_RESOLVER=$(awk '/nameserver/ {print $0}' /etc/resolv.conf | awk 'NR==1 {print $2}')
[13:09][root@hz /]# dig +short A github.com @$LOCALDNS_RESOLVER >/dev/null 2>&1; echo $?
10
[13:09][root@hz /]# dig +short A raw.githubusercontent.com @$LOCALDNS_RESOLVER >/dev/null 2>&1; echo $?
10
[13:09][root@hz /]# dig +short A github.com @$LOCALDNS_RESOLVER
dig: couldn't get address for 'nameserver': not found
[13:10][root@hz /]# dig +short A raw.githubusercontent.com @$LOCALDNS_RESOLVER
dig: couldn't get address for 'nameserver': not found

Code:

[13:10][root@hz /]# LOCALDNS_RESOLVER='8.8.8.8'
[13:11][root@hz /]# dig +short A github.com @$LOCALDNS_RESOLVER >/dev/null 2>&1; echo $?
9
[13:11][root@hz /]# dig +short A raw.githubusercontent.com @$LOCALDNS_RESOLVER >/dev/null 2>&1; echo $?
9
[13:12][root@hz /]# dig +short A github.com @$LOCALDNS_RESOLVER
;; connection timed out; no servers could be reached
[13:12][root@hz /]# dig +short A raw.githubusercontent.com @$LOCALDNS_RESOLVER
;; connection timed out; no servers could be reached

When doing the last one, with 8.8.8.8, all the results came really very slow.

Wish you could find out the problem. Thank you!

 

Great! Problem resolved! Thank you very much!