Cache mounts MUST be in the format --mount=type=cache,id=<cache-id>

I'm getting this error while trying to cache downloading a somewhat challenging to cache pip package:

RUN \
    --mount=type=cache,target=/var/cache/apt \
    pip3 download https://github.com/explosion/spacy-models/releases/download/en_core_web_sm-3.7.1/en_core_web_sm-3.7.1.tar.gz

RUN \
    --mount=type=cache,target=/var/cache/apt \
    pip3 download https://github.com/explosion/spacy-models/releases/download/en_core_web_sm-3.7.1/en_core_web_sm-3.7.1.tar.gz

This runs file locally and the package isn't redownloaded, but it fails on Railway with:

Cache mounts MUST be in the format --mount=type=cache,id=<cache-id>

Cache mounts MUST be in the format --mount=type=cache,id=<cache-id>

Why is id mandatory, and why is it missing the target field?

Solution:

--mount=type=cache,id=s/<service id>-/root/cache/pip,target=/root/.cache/pip

--mount=type=cache,id=s/<service id>-/root/cache/pip,target=/root/.cache/pip

...

Jump to solution

14 Replies

Percy•5mo ago

Project ID: 87f6d50b-7bab-488e-b802-02f9edc442e3

SHxKM•5mo ago

87f6d50b-7bab-488e-b802-02f9edc442e3

Brody•5mo ago

the id is the service id, but I'll get you the correct format when I'm back at my computer

SHxKM•5mo ago

doesn't seem like I can use:

RUN \
    --mount=type=cache,id=var/cache/apt \
    pip3 download https://github.com/explosion/spacy-models/releases/download/en_core_web_sm-3.7.1/en_core_web_sm-3.7.1.tar.gz

RUN \
    --mount=type=cache,id=var/cache/apt \
    pip3 download https://github.com/explosion/spacy-models/releases/download/en_core_web_sm-3.7.1/en_core_web_sm-3.7.1.tar.gz

Because that wouldn't really cache it I guess...

Brody•5mo ago

i mean theres not even a service id there

SHxKM•5mo ago

You're correct, but specifying id without target doesn't help (no matter what the ID is)

Brody•5mo ago

I'll get you the correct format when I'm back at my computer

Solution

Brody•5mo ago

--mount=type=cache,id=s/<service id>-/root/cache/pip,target=/root/.cache/pip

--mount=type=cache,id=s/<service id>-/root/cache/pip,target=/root/.cache/pip

SHxKM•5mo ago

Thanks Brody, trying to go a different way about this but this will surely come handy!

Brody•5mo ago

no problem

SHxKM•5mo ago

@Brody :

id=s/<service id>-

id=s/<service id>-

the s/ and the - are intetional, correct?

Brody•5mo ago

yes

SHxKM•5mo ago

Ahhh but unfortunately I'm using the same Dockerfile for two services...sigh

Brody•5mo ago

might have to forgo the cache then

Gaming

Programming

Cache mounts MUST be in the format --mount=type=cache,id=<cache-id>