Simplify K3s service startup for HA

Signed-off-by: Derek Nola <derek.nola@suse.com>

roles/k3s/agent/tasks/main.yml

@@ -12,5 +12,5 @@
   ansible.builtin.systemd:
     name: k3s-agent
     daemon_reload: true
-    state: restarted
+    state: started
     enabled: true

roles/k3s/agent/templates/k3s-agent.service.j2

@@ -1,13 +1,17 @@
 [Unit]
 Description=Lightweight Kubernetes
 Documentation=https://k3s.io
+Wants=network-online.target
 After=network-online.target
 
+[Install]
+WantedBy=multi-user.target
+
 [Service]
 Type=notify
-ExecStartPre=-/sbin/modprobe br_netfilter
-ExecStartPre=-/sbin/modprobe overlay
-ExecStart=/usr/local/bin/k3s agent --data-dir {{ k3s_server_location }} --server https://{{ api_endpoint }}:{{ api_port }} --token {{ token }} {{ extra_agent_args }}
+EnvironmentFile=-/etc/default/%N
+EnvironmentFile=-/etc/sysconfig/%N
+EnvironmentFile=-/etc/systemd/system/k3s.service.env
 KillMode=process
 Delegate=yes
 # Having non-zero Limit*s causes performance problems due to accounting overhead
@@ -19,6 +23,7 @@ TasksMax=infinity
 TimeoutStartSec=0
 Restart=always
 RestartSec=5s
-
-[Install]
-WantedBy=multi-user.target
+ExecStartPre=/bin/sh -xc '! /usr/bin/systemctl is-enabled --quiet nm-cloud-setup.service'
+ExecStartPre=-/sbin/modprobe br_netfilter
+ExecStartPre=-/sbin/modprobe overlay
+ExecStart=/usr/local/bin/k3s agent --data-dir {{ k3s_server_location }} --server https://{{ api_endpoint }}:{{ api_port }} --token {{ token }} {{ extra_agent_args }}