Red Hat Satellite 6 manifest refresh fails with Failed to open TCP connection to satellite.example.com:443 (getaddrinfo: Temporary failure in name resolution)

Environment

• Red Hat Satellite 6.5

Issue

• Red Hat Satellite manifest refresh fails with "Failed to open TCP connection to satellite.example.com:443 (getaddrinfo: Temporary failure in name resolution)"

Resolution

• Ensure 443 is white listed in firewall/proxy on Satellite server.

  # telnet satellite.example.com 443
  

• Ensure DNS resolution works in forwards and reverse way.

  # nslookup satellite.example.com
  # nslookup 192.0.xxx.xxx
  

• Ensure proper hosts entry in /etc/hosts file on Satellite server.

   192.0.xxx.xxx satellite.example.com satellite
  

For more KB articles/solutions related to Red Hat Satellite 6.x Manifest Issues, please refer to the Consolidated Troubleshooting Article for Red Hat Satellite 6.x Manifest Issues

Root Cause

• Satellite is not able to resolve FQDN of own which is causing manifest refresh to fail.

• 443 port is not opened in firewall on Satellite server.

Diagnostic Steps

• While trying to refresh manifest from Satellite WebUI below error is observed.

  Failed to open TCP connection to satellite.example.com:443 (getaddrinfo: Temporary failure in name resolution)
  

• In /var/log/foreman/production.log look for below error and traceback.

      2020-04-28T17:40:23 [E|kat|ce81144a] SocketError: Failed to open TCP connection to satellite.example.com:8443 (getaddrinfo: Temporary failure in name resolution)
  /opt/rh/rh-ruby25/root/usr/share/ruby/net/http.rb:939:in `rescue in block in connect'
  /opt/rh/rh-ruby25/root/usr/share/ruby/net/http.rb:936:in `block in connect'
  /opt/rh/rh-ruby25/root/usr/share/ruby/timeout.rb:93:in `block in timeout'
  /opt/rh/rh-ruby25/root/usr/share/ruby/timeout.rb:103:in `timeout'
  /opt/rh/rh-ruby25/root/usr/share/ruby/net/http.rb:935:in `connect'
  /opt/rh/rh-ruby25/root/usr/share/ruby/net/http.rb:920:in `do_start'
  /opt/rh/rh-ruby25/root/usr/share/ruby/net/http.rb:909:in `start'
  /opt/theforeman/tfm/root/usr/share/gems/gems/rest-client-2.0.1/lib/restclient/request.rb:715:in `transmit'
  /opt/theforeman/tfm/root/usr/share/gems/gems/rest-client-2.0.1/lib/restclient/request.rb:145:in `execute'
  /opt/theforeman/tfm/root/usr/share/gems/gems/rest-client-2.0.1/lib/restclient/request.rb:52:in `execute'
  /opt/theforeman/tfm/root/usr/share/gems/gems/rest-client-2.0.1/lib/restclient/resource.rb:51:in `get'
  /opt/theforeman/tfm/root/usr/share/gems/gems/katello-3.10.0.58/app/lib/katello/resources/candlepin/proxy.rb:26:in `get'
  

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