> He was "building Docker images for each of the services". So not a single one. 10 of them.
10 services, 10 installers, 10 installations.
Where exactly do you see any problem or issue?
> even a single Docker file would not be as simple as a setup script. A setup script on the host OS would install some packages that the host OS will keep up to date. Using a Docker image instead puts the burden on you to keep it up to date.
That's simply wrong on many levels. Yes, a single Dockerfile is as simple (if not simpler) than a setup script. A Dockerfile is a setup script.
And yes, you can update individual containers or even build updated images.
Again, you seem to be commenting on stuff you know nothing about.
> Yes, a single Dockerfile is as simple (if not simpler) than a setup script. A Dockerfile is a setup script.
Sure, but:
a) you have 10 setup scripts rather than 1. This would make sense if you actually wanted to have different dependencies/OS setup/whatever for your 10 services. But if you've decided to standardise on a common baseline set of dependencies for the sake of consistency (which is a valid choice) then why repeat them 10 times over?
b) You have the extra intermediate artifacts of the images which just give you one more thing to get out of date, go wrong, or slow down your process. Rather than run script -> get updated things, it's run script -> generate images and then deploy those images. Sure, it's all automatable, but what's it gaining you for this use case?
If you have a single setup script to build, package and deploy all 10 services, and you can't build and/or deploy each service independently, then you have more important things to worry about than figuring how containers are used in the real world.
Actually, it is, because your criticizing proper deployment strategies, which are not specific to containers, with a usecase that has many technical red flags. You can't simply criticize deployment best practices by giving an blatant anti-pattern as an example. And do note that this has nothing to do with containers at all, because this applies equally well to VM and bare metal deployments.
To have a productive discussion you have to actually engage. If there's really a "blatant anti-pattern" then it shouldn't be so hard to explain what's wrong with it. Your replies so far have been no more substantial than "you're wrong".
10 services, 10 installers, 10 installations.
Where exactly do you see any problem or issue?
> even a single Docker file would not be as simple as a setup script. A setup script on the host OS would install some packages that the host OS will keep up to date. Using a Docker image instead puts the burden on you to keep it up to date.
That's simply wrong on many levels. Yes, a single Dockerfile is as simple (if not simpler) than a setup script. A Dockerfile is a setup script.
And yes, you can update individual containers or even build updated images.
Again, you seem to be commenting on stuff you know nothing about.