Setting Up Jenkins EC2 Linux Agent with Instance Storage

AWS EC2 Linux instance storage needs to be initialized first before it can be used. When setting up Jenkins EC2 Linux agent, we can do this with Init Script. The Init Script below formats and mounts instance storage if available and use it as Jenkins workspace and Docker data-root. This Init Script is failsafe. It means that it will not cause any errors if it turns out that the EC2 Linux instance does not have an instance storage.

set -x

export DEBIAN_FRONTEND=noninteractive

apt-get -qq update

apt-get -qq -y install nvme-cli

mkdir -p /storage

EPHEMERAL_DISK=$(nvme list | grep 'Amazon EC2 NVMe Instance Storage' | awk '{ print $1 }')

test -n "$EPHEMERAL_DISK" && (mkfs -t ext4 "$EPHEMERAL_DISK" && mount "$EPHEMERAL_DISK" /storage) || true  # Use instance storage (if any) e.g. m5dn.large

lsblk

apt-get -qq -y install default-jre-headless git git-lfs

mkdir -p /storage/jenkins

chmod a+w /storage/jenkins

apt-get -qq -y install make

mkdir -p /etc/docker

mkdir -p /storage/docker

cat << EOF > /etc/docker/daemon.json

{

  "data-root": "/storage/docker"

}

EOF

curl -fsSL https://get.docker.com -o get-docker.sh

sh get-docker.sh

chgrp docker /usr/bin/docker

chmod g+s /usr/bin/docker

apt-get clean