add nomad bootstrap script

nomad-bootstrap.sh

@@ -0,0 +1,90 @@
+#!/bin/bash
+# Nomad Bootstrap Script
+# Params:
+#   client  :   bootstraps as client
+
+# exit on error
+set -e
+
+# create nomad dir
+mkdir -p /opt/nomad
+
+# create nomad user
+useradd --system --home /etc/nomad.d --shell /bin/false nomad
+
+nomaduser=nomad
+nomadgroup=nomad
+
+if [ "$#" -eq 1 ] && [ "$1" == "-client" ]; then
+  echo "bootstraping as nomad client"
+  nomaduser=root
+  nomadgroup=root
+fi
+
+
+# write systemd conf
+cat >/etc/systemd/system/nomad.service <<EOF
+[Unit]
+Description = Nomad
+Documentation = https://nomadproject.io/docs/
+Wants = network-online.target
+After = network-online.target
+
+Wants = consul.service
+After = consul.service
+
+[Service]
+User = $nomaduser
+Group = $nomadgroup
+ExecReload=/bin/kill -HUP \$MAINPID
+ExecStart=/usr/local/bin/nomad agent -config /etc/nomad.d
+KillMode=process
+KillSignal=SIGINT
+LimitNOFILE=65536
+LimitNPROC=infinity
+Restart=on-failure
+RestartSec=2
+TasksMax=infinity
+OOMScoreAdjust=-1000
+
+[Install]
+WantedBy=multi-user.target
+EOF
+
+# create config dir
+mkdir -p /etc/nomad.d && chmod 700 /etc/nomad.d
+
+# write common nomad config
+cat >/etc/nomad.d/nomad.hcl <<EOF
+datacenter = "dc1"
+data_dir = "/opt/nomad"
+EOF
+
+if [ $nomaduser == "nomad" ]; then
+
+  # write server config
+  cat >/etc/nomad.d/server.hcl <<EOF
+server {
+  enabled = true
+  bootstrap_expect = 1
+}
+EOF
+
+else
+
+  # write client config
+  cat >/etc/nomad.d/client.hcl <<EOF
+client {
+  enabled = true
+}
+EOF
+
+fi
+
+# reload systemd
+systemctl daemon-reload
+
+# enable and start service
+systemctl enable --now nomad.service
+
+echo "Done! Nomad service enabled and started."