Add nss-lookup to the systemd wants (#791)

* Add nss-lookup to the systemd wants to ensure DNS is running before starting nebula

* Add Ansible & example service scripts

* Fix #797

* Align Ansible scripts and examples

Co-authored-by: John Maguire <contact@johnmaguire.me>

dist/arch/nebula.service

@@ -1,6 +1,6 @@
 [Unit]
-Description=nebula
-Wants=basic.target network-online.target
+Description=Nebula overlay networking tool
+Wants=basic.target network-online.target nss-lookup.target time-sync.target
 After=basic.target network.target network-online.target
 
 [Service]

dist/fedora/nebula.service

@@ -1,15 +1,14 @@
 [Unit]
 Description=Nebula overlay networking tool
-
+Wants=basic.target network-online.target nss-lookup.target time-sync.target
 After=basic.target network.target network-online.target
 Before=sshd.service
-Wants=basic.target network-online.target
 
 [Service]
+SyslogIdentifier=nebula
 ExecReload=/bin/kill -HUP $MAINPID
 ExecStart=/usr/bin/nebula -config /etc/nebula/config.yml
 Restart=always
-SyslogIdentifier=nebula
 
 [Install]
 WantedBy=multi-user.target

examples/quickstart-vagrant/ansible/roles/nebula/files/systemd.nebula.service

@@ -1,7 +1,8 @@
 [Unit]
-Description=nebula
-Wants=basic.target
-After=basic.target network.target
+Description=Nebula overlay networking tool
+Wants=basic.target network-online.target nss-lookup.target time-sync.target
+After=basic.target network.target network-online.target
+Before=sshd.service
 
 [Service]
 SyslogIdentifier=nebula

examples/service_scripts/nebula.service

@@ -1,7 +1,7 @@
 [Unit]
-Description=nebula
-Wants=basic.target
-After=basic.target network.target
+Description=Nebula overlay networking tool
+Wants=basic.target network-online.target nss-lookup.target time-sync.target
+After=basic.target network.target network-online.target
 Before=sshd.service
 
 [Service]