graylog docker container on rhel 7

Hey @beauvalon

When you install graylog sidecar

wget https://packages.graylog2.org/repo/packages/graylog-sidecar-repository_1-5_all.deb
sudo dpkg -i graylog-sidecar-repository_1-5_all.deb
sudo apt-get update && sudo apt-get install graylog-sidecar        

Here is another member that had the same issue, check it out see if it works for you.