You are currently viewing [SOLVED] Error: This Jenkins instance appears to be offline – 1 simple solution!
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Problem

During the installation of Jenkins, we may receive an error [ This Jenkins instance appears to be offline ] saying that our Jenkins do not have internet access. The problem may be due to the fact that we have problems with the SSL certificate, and by default Jenkins connects after https, when, for example, wants to download plugins for installation.

This Jenkins Instance Appears To Be Offline

To solve the above problem (this jenkins instance appears to be offline.), just change the protocol from HTTPS to HTTP in the file hudson.model.UpdateCenter.xml and reconstruct Jenkins.

<?xml version='1.1' encoding='UTF-8'?>
<sites>
  <site>
    <id>default</id>
    <!-- <url>https://updates.jenkins.io/update-center.json</url> -->
    <url>http://updates.jenkins.io/update-center.json</url>
  </site>
</sites>

What Is Jenkins?

Jenkins is a standalone, open-source automation server that may be used to automate a variety of software development, testing, and delivery operations.

Jenkins may be set up using native system packages, Docker, or even operate independently from other software on any machine that has Java Runtime Environment (JRE) preinstalled.

Installing Jenkins

More information how to install Jenkins you can find on official Jenkins webpage.

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