Script to download and install etcd for linux amd64

etcd_install.sh

#!/bin/bash
# Utility to download latest etcd version for linux

SYSTEM_VERSION="linux-amd64"

fail(){
 echo "[${0##*/}]: FATAL: ${@}"
 exit 1
}

# Change to the /tmp directory
cd /tmp ||  fail "Failed to change directory to /tmp."

# Fetch the latest etcd release
RELEASE=$(curl -s https://api.github.com/repos/etcd-io/etcd/releases/latest \
    | jq -r '.tag_name')

if [ -z "${RELEASE}" ]; then
    fail "Failed to fetch the latest etcd release."
fi

# Download the tarball
TARBALL="etcd-${RELEASE}-linux-amd64.tar.gz"
DOWNLOAD_URL="https://github.com/etcd-io/etcd/releases/download/${RELEASE}/${TARBALL}"

wget "${DOWNLOAD_URL}" || fail "Failed to download ${TARBALL}."

# Extract the tarball
tar xvf "${TARBALL}" || fail "Failed to extract $TARBALL."

# Move the binaries
cd "etcd-${RELEASE}-${SYSTEM_VERSION}" || fail "Failed to change directory to etcd-${RELEASE}-${SYSTEM_VERSION}."
mv etcd etcdctl /usr/local/bin/ || fail "Failed to move etcd binaries."

# Cleanup
cd /tmp 
rm -rf "etcd-${RELEASE}-${SYSTEM_VERSION}"  || fail "Failed to delete directory to etcd-${RELEASE}-${SYSTEM_VERSION}."