Blog: customizing the docker build bake hcl file

[smiyc]

blog about how I used Jonathan's blog post to create an override hcl.

Signed-off-by: Daniel Chambre [email protected]

[jsilvela]

Thanks Daniel. First post 🎉

There are a few corrections I've made and left as suggestions (highly suggested).
The blog post doesn't have much in the way of motivation and it simply finishes with the build command.
Maybe some narrative here would improve it. With this method, how is your flow easier? Have you been able to retire some old tooling? etc.

Also, please wrap text to 80 columns, as we generally do in CNPG documentation and website.

[smiyc]

@jsilvela I see if I can wrap around some motivation text.

regarding the 80col thing, so no line must be longen then 80 col's?

[jsilvela]

It's not 100% strict. For example it's better not to mess with links. But most lines should not exceed 80 cols.

[jsilvela]

Thanks. Much better.
I've found some typos and some places where I think coherence was broken.
Left suggestions.

[jsilvela]

A few typos, the draft field, and also, do we need to change the package-lock file in this PR? Probably not, right?

[jsilvela]

Looking good.
The draft status and date will need to be changed, aside from that ✔️

[smiyc]

finally!

draft and the date will be edited by the person merging this into main, right?

@sxd @FloorD
do you mind reviewing this?

[sxd]

I think you don't need this since those variables are already defined in the parent bake file =)

[smiyc]

no sir, when I remove both the variables are

$ docker buildx bake -f docker-bake.hcl -f cwd://bake_bookworm.hcl "https://github.com/cloudnative-pg/postgres-containers.git" myimage --push --builder=container --list=variables
[+] Building 0.7s (2/2) FINISHED                                                                                                                                                                                                                               docker-container:container
 => CACHED [internal] load git source https://github.com/cloudnative-pg/postgres-containers.git                                                                                                                                                                                      0.6s
 => [internal] load local bake definitions                                                                                                                                                                                                                                           0.0s
 => => reading bake_bookworm.hcl 3.15kB / 3.15kB                                                                                                                                                                                                                                     0.0s
VARIABLE        TYPE    VALUE           DESCRIPTION                                                                                                                                                                                                                                       
environment		testing		
registry		localhost:5000	
revision		

with both in place

$ docker buildx bake -f docker-bake.hcl -f cwd://bake_bookworm.hcl "https://github.com/cloudnative-pg/postgres-containers.git" myimage --push --builder=container --list=variables
[+] Building 0.7s (2/2) FINISHED                                                                                                                                                                                                                               docker-container:container
 => CACHED [internal] load git source https://github.com/cloudnative-pg/postgres-containers.git                                                                                                                                                                                      0.6s
 => [internal] load local bake definitions                                                                                                                                                                                                                                           0.0s
 => => reading bake_bookworm.hcl 3.15kB / 3.15kB                                                                                                                                                                                                                                     0.0s
VARIABLE        TYPE    VALUE                                   DESCRIPTION                                                                                                                                                                                                               
environment		testing					
registry		XXX/cnpg	
revision		

so when I remove environmen and registry from my bake file, the image will be uploaded to localhost:5000 and the subdirectory will be postgresql-testing

[sxd]

You can modify the value no need to define the variables again :D

[smiyc]

modify the value inside the hcl file?
I had a look at https://docs.docker.com/build/bake/overrides/ and that's how they override a variable inside an override file

variable "TAG" {
  default = "bar"
}

I also have tried to set it like we did for platforms in the troubleshooting session

  platforms = [
    "linux/amd64",
  ]
  environment = [
    "production",
  ]
  registry = [
    "xxx/cnpg",
  ]

but that's not working eighter.

[smiyc]

@sxd 17c5d6e

[smiyc]

@FloorD @sxd
Pls review

[sxd]

@smiyc can you rebase your PR on main and push again? I can't do it due to conflicts =(
@FloorD @jsilvela when we should publish this? I'll do a final review today so we can publish?

[jsilvela]

For me this post could have been published a while ago. Given it three approvals.
On timing I defer to you guys.