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#!/bin/bash
# Hashicorp Consul bootstrap script
# Params:
# server : if present, bootstraps a server
# bind : bind interface address
# server-ip : server ip address
# exit on error
set -e
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if [ "$#" -eq 0 ]
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then
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echo "No options specified, exiting."
exit 1
fi
# create directory if doesn't exist and set permissions
mkdir -p /etc/consul.d/ && chown -R consul:consul /etc/consul.d/
# write systemd conf
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cat >/etc/systemd/system/consul.service <<EOF
[Unit]
Description="HashiCorp Consul - A service mesh solution"
Documentation=https://www.consul.io/
Requires=network-online.target
After=network-online.target
ConditionFileNotEmpty=/etc/consul.d/consul.hcl
[Service]
EnvironmentFile=/etc/consul.d/consul.env
User=consul
Group=consul
ExecStart=/usr/bin/consul agent -config-dir=/etc/consul.d/
ExecReload=/bin/kill --signal HUP $MAINPID
KillMode=process
KillSignal=SIGTERM
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
EOF
# reload systemd
systemctl daemon-reload
# parameter setup
consultype="client"
bind_ip=null
server_ip=null
# read parameters
while [[ "$#" -gt 0 ]]
do
case $1 in
-server)
consultype="server"
;;
-bind)
bind_ip="$2"
;;
-server-ip)
server_ip="$2"
;;
esac
shift
done
# write config file
if [ $consultype == "client" ]
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then
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cat >/etc/consul.d/consul.hcl <<EOF
datacenter = "dc1"
data_dir = "/opt/consul"
client_addr = $bind_ip
retry_join = ["$server_ip"]
EOF
chmod 640 /etc/consul.d/consul.hcl
else
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cat >/etc/consul.d/server.hcl <<EOF
datacenter = "dc1"
data_dir = "/opt/consul"
bind_addr = $bind_ip
server = true
bootstrap_expect = 1
EOF
chmod 640 /etc/consul.d/server.hcl
fi
echo "Done! Please launch with systemctl start consul"