Hammer command fails with "Error Failed to open TCP connection to getaddrinfo: Name or service not known"

Environment

• Red Hat Satellite

Issue

• hammer ping fails with following error.

# hammer ping
Error: Failed to open TCP connection to : (getaddrinfo: Name or service not known)

• Satellite needs to configured to use the proxy.

Resolution

• This solution is only applicable if you would like to configure Satellite to use proxy.
• Configure Satellite to use proxy mentioned in the article
• After that, restart the services.

# satellite-maintain service restart
# hammer ping

• If it still fails, take a back up of Satellite server and run :

# satellite-installer --scenario satellite
# satellite-maintain service restart
# hammer ping

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

Root Cause

• There is a proxy entry under /etc/rhsm/rhsm.conf but the Satellite is not configured to use proxy.

# an http proxy server to use
# proxy_hostname = IP
  proxy_hostname = proxy.example.com
# port for http proxy server
proxy_port = 8080

• There is a proxy entry under profile environment

# env | grep -i proxy
https_proxy=proxy.example.com:<port>
http_proxy=proxy.example.com:<port>

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