Error when building the Docker image

[cavatron (Cavanaugh Richards)]

I am trying to build Graylog for ARM architectures using github.com/graylog2/graylog-docker.
After starting the build using docker build --build-arg GRAYLOG_VERSION=3.0 -t graylog . the build step fails because https://packages.graylog2.org/releases/graylog/graylog-${GRAYLOG_VERSION}.tgz.sha256.txt does not seem to exist. Am I formatting the value for GRAYLOG_VERSION incorrectly?

Here is the full Docker build output:

Sending build context to Docker daemon  57.86kB
Step 1/32 : FROM debian:stretch-slim as graylog-downloader
 ---> c08899734c03
Step 2/32 : ARG VCS_REF
 ---> Using cache
 ---> 4c64b87c4572
Step 3/32 : ARG GRAYLOG_VERSION
 ---> Using cache
 ---> 098f5754b73a
Step 4/32 : WORKDIR /tmp
 ---> Using cache
 ---> f5a600c24dbf
Step 5/32 : RUN   apt-get update  > /dev/null &&   apt-get install --assume-yes     ca-certificates     curl > /dev/null
 ---> Using cache
 ---> 71957691d655
Step 6/32 : RUN   curl     --silent     --location     --retry 3     --output "/tmp/graylog-${GRAYLOG_VERSION}.tgz"     "https://packages.graylog2.org/releases/graylog/graylog-${GRAYLOG_VERSION}.tgz"
 ---> Using cache
 ---> bb42f2b1abd0
Step 7/32 : RUN   curl     --silent     --location     --retry 3     --output "/tmp/graylog-${GRAYLOG_VERSION}.tgz.sha256.txt"     "https://packages.graylog2.org/releases/graylog/graylog-${GRAYLOG_VERSION}.tgz.sha256.txt"
 ---> Using cache
 ---> 48af7de5cd18
Step 8/32 : RUN   sha256sum --check "graylog-${GRAYLOG_VERSION}.tgz.sha256.txt"
 ---> Running in 1fd40711e147
sha256sum: graylog-3.0.tgz.sha256.txt: no properly formatted SHA256 checksum lines found
The command '/bin/sh -c sha256sum --check "graylog-${GRAYLOG_VERSION}.tgz.sha256.txt"' returned a non-zero code: 1

I also tried this on a device with an amd64 architecture. I think this has to do with the URL not existing or me not having proper permissions

EDIT

After fiddling with this more, it seems that hitting https://packages.graylog2.org/releases/graylog/graylog-3.0.tgz.sha256.txt returns the following XML which causes the checksum to fail:

<?xml version="1.0" encoding="UTF-8"?>
<Error>
  <Code>NoSuchKey</Code>
  <Message>The specified key does not exist.</Message>
  <Key>graylog/graylog-3.0.tgz.sha256.txt</Key> 
  <RequestId>ACC6E994E8D57222</RequestId> 
<HostId>O/0N8osrfMl66Ns3Qj4ATCIqZD9WKm28zGim8myIj2tbxOllmzYH50quXbPump8q3Cu3EPQdL0E=</HostId>
</Error>

EDIT 2

I seem to have fixed this issue by editing the URLs Dockerfile to point to downloads.graylog.org rather than packages.graylog2.org. I will consider making a PR in the docker repo