A Design Question: Java and The Other Modern Runtimes

[rkttu]

I am following the nomad repository GitHub issue #3161 and am posting here. Thanks for the suggestion.

I came across this thread while investigating the material to use Nomad in a Windows container deployment.

.NET Core (.NET 5) runs as a separate virtual machine, just like Java. I have the same curiosity as other people.

And besides .NET, As far as I know, there are several technologies based on this model. (E.g., runtimes in languages such as Python, Ruby, etc.)

I understood that all runtimes other than Java are advised to use the Docker driver. However, I am also curious about the design reason why a separate driver is provided for Java.

[lgfa29]

Hi @rkttu

@rkttu

I understood that all runtimes other than Java are advised to use the Docker driver.

Not necessarily. Behind the scenes, the Java driver uses most of the same plumbing of the exec driver (or raw_exec if resource isolation is not present). So you can use exec or for other languages. There are also other community task driver plugins for other scenarios.

@rkttu

I am also curious about the design reason why a separate driver is provided for Java.

I don’t know the exact reason, but if I were to guess I would say it’s a mix of user demand and team knowledge. It would be hard for us to build a .NET specific task driver, for example, since we don’t have enough experience with the platform.