What are the steps to build a new docker container?

[jamesnos]

Hi All,
Just needing a bit of a point in the right direction.

I'm just trying to bake my own docker image locally of the ui and server together (binary). Unable to do so and tried multiple different ways.

Do you have some steps? How would your CICD process build the docker image E2E from a cold start.

[markphelps]

Hi @jamesnos

I just made some changes to how Flipt is built/bootstrapped, but to answer your question you should be able to build your own image two different ways.

Build an image as close to the official Flipt image as possible

mac os/homebrew required

This is how I build and release the Flipt docker image, using a combo of musl-cross and goreleaser

Basically the process is:

1. Flipt binary is built using go-releaser, which has some special configs to build for Linux, using cgo (required for the https://github.com/mattn/go-sqlite3 lib)
2. go-releaser copies the resulting binary (now built for linux/amd64) into the build/Dockerfile, this is the Dockerfile that actually results in the release image, copying configs, migrations, etc

To do this you'll need (assuming you are on a mac):

1. goreleaser
2. homebrew-musl-cross

Once those are installed, you should just need to run make snapshot, which will then build a snapshot build (which is the same as a release, it just doesnt create a release on Github/etc)

This should output the name of the snapshot image at the end, then you can just run it just like the docs say but with your image name instead.

Build an image based on the dev Docker file

This way will not give you the exact same result as the step above (ie it will be a larger image than the release version), but will work if you just want to explore/run Flipt but want to build and run it within Docker.

1. Modify the Dockerfile and add the following two lines at the bottom:

RUN make build
CMD [ "./bin/flipt", "--config", "./config/local.yml" ]

2. Build an image using this new Dockerfile:

docker build -t flipt:dev . 

3. Run according to the docs but with your flipt:dev instead of markphelps/flipt

I hope this helps!

[jamesnos]

Thanks @markphelps , this is a huge help, appreciate the detailed response. Really impressed with the project overall. Well done!