ETCD_DATA_DIR="/var/lib/etcd"

pre_upgrade() {
cat << EOF
	To upgrade an existing v2 etcd deployment to 3.0 you must be running 2.3
	And you should read the docs: /usr/share/doc/etcd/upgrades/
EOF
}

post_install() {
    mkdir -p "${ETCD_DATA_DIR}"
    # create an etcd user
    id -u etcd &>/dev/null || useradd -r -M -U -d /dev/null -s /bin/nologin etcd
    chown -R etcd:etcd "${ETCD_DATA_DIR}"
}

post_upgrade() {
    post_install
}