AWS CESI Script

get-conf.sh

#!/bin/bash
#
# This script grabs the Name, Ip and environment tags from aws.
# It then grabs a cesi conf header file and appends (using heredocs).

config="/opt/cesi/defaults/cesi.conf.toml"
tmpconf="/tmp/cesi.conf.toml"

# Create the header in our new copy of conf file
cp -f "${config}.head" ${tmpconf}

# fetch name, ip, staging from ec2 and stuff into config using heredoc
while read -r ip name environment; do
cat << EOF >> ${tmpconf}

[[nodes]]
name = "${name} - ${ip}"
environment = "${environment}"
username = ""
password = ""
host = "${ip}"
port = "9001"
EOF
done < <(aws ec2 describe-instances \
    --query 'Reservations[*].Instances[*].{Instance:InstanceId,Instance:PrivateIpAddress,environment:Tags[?Key==`environment`]|[0].Val
ue,Name:Tags[?Key==`Name`]|[0].Value}' \
    --output text |sort -k 2)

#Any changes? Then copy new conf into place  and restart cesi
if ! diff ${tmpconf} ${config} ;then
    echo "Changes detected, overwriting cesi conf and signaling config reload"
    cp ${tmpconf} ${config}
    pkill -HUP -f cesi
fi