Are you installing the agent as a root user?
Have you verified that your API key (https://app.stackdriver.com/settings/apikeys) matches the one you entered during installation?
Did you start the agent with /sbin/service stackdriver-agent start after installation? (not Ubuntu or Debian)
If you are upgrading the agent to Ubuntu Precise and you receive the following SSL certification error:
write_http plugin: curl_easy_perform failed with status 60: SSL certificate problem, verify that the CA cert is OK. Details:#012error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
curl https://www.google.comIf successful, please run
curl -k -v https://gateway.stackdriver.comand send the output to support. If unsuccessful, please run
c_rehashas root which will recreate the tree of symlinks in /etc/ssl/certs. You can see more information about the bug at https://bugs.launchpad.net/ubuntu/source/openssl/bug/1014640.
Please contact us if you need any assistance.