supercronic cannot install curl

Questions / Help
1

I am trying to install supercronic in a rails app and I am stuck trying to install curl.
I have added this to my dockerfile:
RUN apt-get install -y curl
but I get this error:
E: Unable to locate package curl

Has anyone had this problem?

thanks.

2

Hi, there

Have you tried running apt-get update before apt-get install?

3

Hi,
apt-get update is run a few times in the dockerfile. I appended curl to the line which installs postgresql-client and it seems to have installed.
However now I get a different error from curl…
executor failed running [/bin/sh -c curl -fsSLO "$SUPERCRONIC_URL" && echo "${SUPERCRONIC_SHA1SUM} ${SUPERCRONIC}" | sha1sum -c - && chmod +x "$SUPERCRONIC" && mv "$SUPERCRONIC" "/usr/local/bin/${SUPERCRONIC}" && ln -s "/usr/local/bin/${SUPERCRONIC}" /usr/local/bin/supercronic]: exit code: 23

4

I’m assuming this is failing when you run fly deploy, right?
Have you tried building the container on your own machine? If so, did it work?

5

Yes, this is the output when I run docker build -t my_app_name locally

6

Since this is failing locally, I don’t think this is related to Fly’s platform, but correct me if I’m wrong or missing any details.

On a quick search, I found macos - Why does cURL return error "(23) Failed writing body"? - Stack Overflow, which looks a little like your case. I’d start there.

7

Ok so it looks like the filesystem of my container is read only. I ran a bash shell and I was not able to create a file.
My docker knowledge does not extend to knowing why this is the case but I appear to have solved the problem by moving the supercronic download and install to higher up in the dockerfile where the filesystem appears to be writable…

Thanks for the help.

1 Like
8

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