Separate docker image when in devMode

Question

Hey nice garden folks I would like to use a separate docker image when running in dev mode how can I achieve that in the most straightforward way I couldn t find

icy-furniture-17516 · Answer

Went with a simple ternary in the end although intuitively I was expecting it to be a dedicated field under services devMode ``` kind Module name ui type container dockerfile $ command params contains dev Dockerfile dev Dockerfile ```

bright-policeman-43626 · Answer

Hey < icy furniture 17516> this was actually a really hacky and neat way to solve this problem I also agree that there should me a dedicated field to add a different dockerfile if using devMode Would you be open to creating a feature request directly in our Github for this so we might have it in the future

icy-furniture-17516 · Answer

Absolutely

bright-policeman-43626 · Answer

Thanks a lot

icy-furniture-17516 · Answer

https github com garden io garden issues 3968

bright-policeman-43626 · Answer

Thanks a lot < icy furniture 17516> I ll make sure to bring this Feature request up

average-painter-87026 · Answer

Are you using Dockerfiles specifically for devMode to work around the fact that the container module will rebuild when the Dockerfile source code from COPY statements changes which is redundant when devMode of the service which uses the output image is already syncing the same source code I think that d it be a nice feature for Garden to `exclude` files when building a service s container that are `include`d in the devMode sync rather than maintaining duplicate Dockerfiles just for dev mode with the source code stripped out I m not sure that s possible desirable though so this is a nice workaround

icy-furniture-17516 · Answer

Well I was doing it because the dev container is very different from the prod container In dev we simply run `yarn serve` while in prod we use a multistage docker build to build the static assets and copy them over to a final image where nginx will pick them up

icy-furniture-17516 · Answer

but I noticed that garden doesn t rebuild the image when I make changes in the source files

icy-furniture-17516 · Answer

sometimes it does but I m not entirely sure when and why exactly

icy-furniture-17516 · Answer

but you are right it would be really nice if we could control when to rebuild an image when running in devmode

icy-furniture-17516 · Answer

< bright policeman 43626> < quaint dress 831> how does it work exactly When does garden rebuild an image when it is running in devMode I couldn t find detailed information on that

quaint-dress-831 · Answer

< icy furniture 17516> I think Dev Mode will not trigger a rebuild on anything within the Mutagen file sync path you ve set The UX of running a new pod and terminating your connection to the last every time you save would be nasty I will double check on the nitty gritty technicals for you < chilly gigabyte 83853> would likely know

icy-furniture-17516 · Answer

I assumed the same thx for checking I m happy with some pointers in the code and dig deeper for myself

average-painter-87026 · Answer

Turns out it was actually rebuilding the image for the tests which I didn t expect in dev mode https github com garden io garden issues 3922

chilly-gigabyte-83853 · Answer

Hi < icy furniture 17516> sorry for the late reply but I completely missed the mention by < quaint dress 831> In devMode Garden won t rebuild the image we usually use a ternary for the Dockerfile if you need different Dockerfiles I d be interested to hear more about your setup and what s the difference between prod dev dockerfiles We use one for both environments but it s a multistage one and we specify a different stage for development using `build targetImage` We start in devMode a command that runs concurrently which runs `swc` in watch mode for fast rebuilding and nodemon to restart the node server I am assuming you are running a node app here The dev command and devMode are getting a revamp in the upcoming 0 13 release and will also allow an interactive way of rebuilding the container if needed but I d need to double check for details before making promises

icy-furniture-17516 · Answer

we started to use multi stage as well but how do I tell I want to use the intermediate layer when in dev mode we still use a variable and ended up with this ``` mode $ command params contains dev command params dev contains mymodule || command params dev contains || command params dev length == 0 dev prod ```

icy-furniture-17516 · Answer

> In devMode Garden won t rebuild the image I experienced rebuilds in devMode when I modified the module s garden yml and I ended up excude ing it from module files Is that a bad practice

icy-furniture-17516 · Answer

Another thing we are struggling with a bit and sorry if it s offtopic here I m happy to bring it up separately if it makes sense is using entr with multiple files The issue is that it seems entr might reload our app when the sync has finished for one of the files but is still in progress but the reload doesn t seem to happen again with the final state Is it a thing you experienced as well or maybe it s just a false assumption we had during our trial and error sessions Is there a better way to do this Do you plan to have better support for this app reload use case For example if this is really an issue garden could possibly provide a convenient way for using entr by syncing a hash calculated from a predefined file set to the continer and let entr watch and react only for that

quaint-dress-831 · Answer

< icy furniture 17516> what do you mean by entr

alert-helicopter-61082 · Answer

Just wanted to chime in here to mention this https github com garden io garden pull 3913 This is about to get a lot cleaner and easier with the upcoming Bonsai 0 13 release

icy-furniture-17516 · Answer

this guy https github com eradman entr like in the example from here https github com garden io quickstart example blob main api garden yml L12