[Bug 1774632] Re: The symbolic link /etc/resolv.conf points to the wrong file by default
Using Ubuntu 20.04.3 latest update Oct 19th After the one but last update Oct 10th suddenly I had a problem resolving DNS. Before the update my /etc/resolv.conf read : nameserver 127.0.0.53 In my netmanager settings I had/have entered 2 DNS-Server IP adresses of my ISP : 1xx.2xx.xxx.21 1xx.2xx.xxx.22 the result of command $ ls -al /etc/resolv.conf lrwxrwxrwx 1 root root 32 okt 13 14:10 /etc/resolv.conf -> /run/systemd/resolve/resolv.conf So I did $ sudo rm -f /etc/resolv.conf $ sudo ln -s /run/systemd/resolve/resolv.conf /etc/resolv.conf Only to find it didn't change anything : the content of new /etc/resolv.conf after restarting the systemd-resolve service still reads nameserver ::1 I managed to complete the updates by repeatedly saving manually an /etc/resolv.conf file and overwriting the file written by the systemd- resolve service (workaround). to make certain that people don't doubt my capacity to read : I DO understand the warning at the top of the file saying that the file is overwritten regularly. I manage to maintain a "usable connection" by regularly overwriting the file /run/systemd/resolve/resolv.conf, with following content nameserver 1xx.2xx.xxx.21 nameserver 1xx.2xx.xxx.22 until i restart the systemd-resolve service and the file is overwritten by resolve and it reverts to nameserver ::1 I also checked the /run/systemd/resolve/stub-resolv.conf file which has the following content nameserver 127.0.0.53 options edns0 trust-ad My question is : A- How can I make sure that the resolve service writes the correct file content in /etc/resolv.conf = I do understand that this is a sym-link B- Where is the parameter file that systemd-resolve uses to produce /etc/resolv.conf and /run/systemd/resolve/resolv.conf, because it sure doesn't read the configuration entered in netmanager settings -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1774632 Title: The symbolic link /etc/resolv.conf points to the wrong file by default To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1774632/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1774632] Re: The symbolic link /etc/resolv.conf points to the wrong file by default
OS Ubuntu 20.04.3 LTS After a recent update a working laptop suddently developped the following problem : - DNS problems for al Internet related apps - Ping : termporary failure in Name resolution editing manually allows internet access for short term until systemd-resolve overwrites the file. Its no use to replace /etc/resolv.conf with a file as it get overwritten regulary. The stub-file /run/systemd/resolve/stub-resolv.conf contains > nameserver 127.0.0.53 > options edsn0 trust-ad In my Network options I have DHCP auto DNS manual 19*.2*8.*.21, 19*.2*8.*.22 which are my ISP dedicated DNS servers (stars are hiding numbers) when i overwrite /etc/resolv.conf with > nameserver 19*.2*8.*.21 > nameserver 19*.2*8.*.22 my internet connection temporarily works The /run/systemd/resolve/resolve.conf contains > nameserver ::1 I tried overwriting /run/systemd/resolve/stub-resolv.conf with the correct nameservers and then applied your solution : $ sudo rm -f /etc/resolv.conf $ sudo ln -s /run/systemd/resolve/resolv.conf /etc/resolv.conf And restarted the systemd-resolve service and the /etc/resolv.conf and /run/systemd/resolve/resolv.conf files showed again > nameserver ::1 Your solution doesn't work -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1774632 Title: The symbolic link /etc/resolv.conf points to the wrong file by default To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1774632/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1774632] Re: The symbolic link /etc/resolv.conf points to the wrong file by default
Sorry typo in my previous message ; it should read I tried overwriting /run/systemd/resolve/resolv.conf with the correct nameservers and then applied your solution : -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1774632 Title: The symbolic link /etc/resolv.conf points to the wrong file by default To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1774632/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1774632] Re: The symbolic link /etc/resolv.conf points to the wrong file by default
ALSO AFFECTS DOCKER VPS - Is there a definitive solution? Im going to try @jasdenty solution. Im not that technical user. It affects my VPS after "apt upgrade". Suddenly resolving domains from docker containers stopped - from what i understand docker defaultly inherits /etc/resolv.conf. Completly revisiting my docker networks didn't help. So this comment is for you guys whose dockers stopped working after update. Thanks -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1774632 Title: The symbolic link /etc/resolv.conf points to the wrong file by default To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1774632/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1774632] Re: The symbolic link /etc/resolv.conf points to the wrong file by default
OS: Ubuntu 18.04 bionic Kernel: x86_64 Linux 4.19.17 For those who encounter situations otherwise, here is my case and workarounds. my case: --- /etc/resolv.conf -> ../run/systemd/resolve/stub-resolv.conf I remove the symlink and assign a new one /etc/resolv.conf -> /run/systemd/resolve/resolv.conf reboot, and the /etc/resolv.conf says there is NO DNS SERVER. DNS Lookup is completeny unusable at this point. If it points to the stub-resolv.conf variant, it seems that the systemd-resolved is not working properly, at 127.0.0.53. --- my solution: --- 1. remove the symlink, 2. replace it with a solid file, either empty or with a line `nameserver 8.8.8.8` 3. reboot and what you will see is a autogenerated resolv.conf made by NetworkManager, which changes dynaminally depending on what network you are connected to. using netstat -tunlp to grep the nameserver in the file, you may see ``` tcp0 0 127.0.1.1:530.0.0.0:* LISTEN 1604/dnsmasq udp0 0 127.0.1.1:530.0.0.0:* 1604/dnsmasq ``` which is also recommended in a lot of threads in askubuntu (i.e. google enable dns cache in ubuntu). --- -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1774632 Title: The symbolic link /etc/resolv.conf points to the wrong file by default To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1774632/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1774632] Re: The symbolic link /etc/resolv.conf points to the wrong file by default
I have been encountering this issue for the past month on my newly installed (1-2 months old) version of Ubuntu 20.04.2 LTS. I finally got frustrated enough to dig in and find a solution and arrived here from a stackexchange comment. FYI is all - OP's solution seems to have fixed the issue for me - will report back in a few days if not. Why is this an issue on vanilla ubuntu? Can you imagine how frustrated non-technical end users would be? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1774632 Title: The symbolic link /etc/resolv.conf points to the wrong file by default To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1774632/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1774632] Re: The symbolic link /etc/resolv.conf points to the wrong file by default
Please disregard my last comment (#5). The problem I had was not this one but related to using other connector agents in addition to NetworkManager, in my case the openvpn3 command line. (Automatic connection to the VPN is not there, but that is probably safest.) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1774632 Title: The symbolic link /etc/resolv.conf points to the wrong file by default To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1774632/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1774632] Re: The symbolic link /etc/resolv.conf points to the wrong file by default
I just want to confirm that this is a problem. I have had it for a while and not found another workaround (until now) than restarting the machine. If this is NOT a bug then something "close by" is a bug. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1774632 Title: The symbolic link /etc/resolv.conf points to the wrong file by default To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1774632/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1774632] Re: The symbolic link /etc/resolv.conf points to the wrong file by default
I just ran into this issue myself on 20.04. Specifically I was adding my own internal nameserver to a vm. @Ubfan, why is stub-resolv.conf the correct file? The file that /etc/systemd/resolved.conf updates is /run/systemd/resolve/resolv.conf. As far as I can tell, the proper way to update /etc/resolv.conf is via /etc/systemd/resolved.conf. So if I want my changes to apply, then the /etc/resolv.conf link should point to the file systemd actually changes. Or is there a different method of updating what nameservers your computer uses? If there is, why is systemd involved with resolv.conf at all? Anyway, I believe this is a bug. Fortunately not one that effects people who don't know how to find the workarounds, but still a bug. I do hope it eventually gets fixed. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1774632 Title: The symbolic link /etc/resolv.conf points to the wrong file by default To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1774632/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1774632] Re: The symbolic link /etc/resolv.conf points to the wrong file by default
The link target, stub-resolv.conf is the correct file for enabling systemd-resolvd. Various problems with the systemd-resolvd may be fixed by installing the libnss-resolve package (bug 1769016). Blank local domain problems have their own bug, 1699660 (fix is to use ~.). This report probably should be marked "invalid". -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1774632 Title: The symbolic link /etc/resolv.conf points to the wrong file by default To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1774632/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1774632] Re: The symbolic link /etc/resolv.conf points to the wrong file by default
Status changed to 'Confirmed' because the bug affects multiple users. ** Changed in: systemd (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1774632 Title: The symbolic link /etc/resolv.conf points to the wrong file by default To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1774632/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
