Extend systemd start timeout for slow systems

Cert generation may cause slow startup times for some systems such as
the Raspberry Pi, set the systemd service TimeoutStartSec to Infinity to
avoid startup timeouts.

README.md

@@ -265,6 +265,8 @@ Documentation=https://k3s.io
 After=network.target
 
 [Service]
+Type=notify
+EnvironmentFile=/etc/systemd/system/k3s.service.env
 ExecStartPre=-/sbin/modprobe br_netfilter
 ExecStartPre=-/sbin/modprobe overlay
 ExecStart=/usr/local/bin/k3s server
@@ -274,6 +276,7 @@ LimitNOFILE=infinity
 LimitNPROC=infinity
 LimitCORE=infinity
 TasksMax=infinity
+TimeoutStartSec=infinity
 
 [Install]
 WantedBy=multi-user.target

install.sh

@@ -402,6 +402,7 @@ LimitNOFILE=infinity
 LimitNPROC=infinity
 LimitCORE=infinity
 TasksMax=infinity
+TimeoutStartSec=infinity
 
 [Install]
 WantedBy=multi-user.target

k3s.service

@@ -13,6 +13,7 @@ LimitNOFILE=infinity
 LimitNPROC=infinity
 LimitCORE=infinity
 TasksMax=infinity
+TimeoutStartSec=infinity
 
 [Install]
 WantedBy=multi-user.target