Failed to resolve host name updates.jenkins-ci.org about docker HOT 21 CLOSED

service docker restart solved the problem.

from docker.

@lnalex You should re-run your jenkins images with parameter "--dns 8.8.8.8". Additional, don't forget to back up your jenkins data if you didn't mount a volume.

from docker.

I was connected to my VPN, hence it wasn't working for me. I disconnected and now I am no longer facing any issues.

from docker.

Hi There. After trying different things, these commands worked for me:

Disable and stop the firewall on my Centos Host
sudo systemctl disable firewalld
sudo systemctl stop firewalld

Then, restart docker

`sudo service docker restart`

I hope it works for you.

from docker.

I has the same problem
You can use the --dns flag when running a container
Try using this
docker run --rm --dns 8.8.8.8 -p 8080:8080 -p 50000:50000 -d -v jenkins_home:/var/jenkins_home jenkins/jenkins

Hope this solves the issue

from docker.

Hi LnAlex,

Will it be possible for you to provide more information on this issue? How did you solve it?

p.s: I am an ex-employee of Atos, India and worked for the AWL project. It is a small world!

from docker.

Sorry, I think the issue for me is somewhere in my k3s cluster. It seems like none of the pods are able to resolve DNS currently. At first I thought Jenkins interpreted 301 as a failure as I received UnknownHostException but it is definitely something else that has gone wrong in the cluster.

EDIT: My issue was with the CoreDNS pod, it works after restarting it. Please disregard my posts as they are completely unrelated to this thread.

from docker.

Guy did you figure out what was the cause of this ?
The ticket was closed by op without updates.
Is it a misconfiguration in docker somewhere ?

Thank you!

from docker.

Misconfiguration with Docker and the firewall.

from docker.

Small world indeed !

That's quite a long time, It was a misconfiguration with my iptables rules on my server and port binding with my container. I did not remember how I fixed it exactly (it was my first times with Docker therefore I was not very smart to using it).

from docker.

I started the docker container as instructed with no configuration to speak of and see this error not sure what inside docker needs to be configured. Maybe can someone put it with the instructions?
Instructions - https://hub.docker.com/_/jenkins/
$ docker run -p 8080:8080 -p 50000:50000 jenkins

---Log----
Installing Plugins/Upgrades
Preparation
Checking internet connectivity
Checking update center connectivity
Failed to resolve host name updates.jenkins-ci.org. Perhaps you need to configure HTTP proxy?
java.net.UnknownHostException: updates.jenkins-ci.org
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:432)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:527)
at sun.net.www.http.HttpClient.(HttpClient.java:211)
at sun.net.www.http.HttpClient.New(HttpClient.java:308)
at sun.net.www.http.HttpClient.New(HttpClient.java:326)
at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1169)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1105)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:999)
at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:933)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1513)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1441)
at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:480)
at hudson.model.UpdateCenter$UpdateCenterConfiguration.testConnection(UpdateCenter.java:1143)
at hudson.model.UpdateCenter$UpdateCenterConfiguration.checkUpdateCenter(UpdateCenter.java:953)
at hudson.model.UpdateCenter$ConnectionCheckJob.run(UpdateCenter.java:1360)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:110)
at java.lang.Thread.run(Thread.java:745)

from docker.

there's nothing to be configured by default, your docker host needs to have internet access and the right dns config

from docker.

@yedaodao worked fine on my container jenkins! great!

from docker.

docker restart worked for me

from docker.

service docker restart solved the problem.

no use docker, how do

from docker.

Hi There, this means your firewall is blocking the traffic , this can be solved in various way like :

1. Add proxy details if you are using a proxy server to manage traffic (like in any organization)
2. If you are working your personal machine add the Add Jenkins application to the list( in windows Windows security>Firewall and network protection > add an app through firewall) or
3. disable the firewall
   Hope this works :)

from docker.

service docker restart solved the problem.

Thanks it worked for me...

from docker.

i tried by disconnecting vpn and its worked for me.

from docker.

I just want to add that I got the same issue after the update url changed from https://updates.jenkins.io/update-center.json to https://updates.jenkins.io/current/update-center.json. There seems to be a redirect in place but my Jenkins instance received a 301 instead.

from docker.

There seems to be a redirect in place but my Jenkins instance received a 301 instead.

Which is expected, as the HTTP response code 301 means "Moved permanently", with the new location in the response headers.

from docker.

service docker restart solved the problem.

It worked for me as well, but I lost the images that was downloaded, just keep it in mind in case you cannot lose your data.

from docker.