I have Droplet on DigitalOcean 2GB / 2 CPUs. Sometimes I need to reboot my server and I realized that it may take a while to start TeamCity (starting time may vary from 10 minutes to 30 minutes). That’s too slow.
I finally found the root of the problem and solution.
During startup, teamcity needs access to /dev/random as a RNG and the default /dev/random does not hold enough entropy to fulfill that need. This blocks the startup process, until enough entropy has been gathered again.
This is a quote from StackOverflow.
There is also a ticket for that in YouTrack: TW-41035.
As you can find from the problem, we basically need to install
haveged. Fortunately, it is in official Ubuntu repository.
To install, we need to go to the terminal and run:
sudo apt-get update sudo apt-get install haveged
That’s it. You may need to restart your server.
Additional info can be found on DigitalOcean.