use yamlencode for k3s configs...

...and remove the now, hopefully unneeded workaround for
agent.conf, all values are in config.yaml now

templates/agent.conf.tpl

@@ -1,3 +0,0 @@
-SERVER_URL="${server_url}"
-NODE_TOKEN="${node_token}"
-AGENT_OPTS=

templates/agent_config.yaml.tpl

@@ -1,4 +0,0 @@
-node-ip: ${node_ip}
-kubelet-arg: "cloud-provider=external"
-flannel-iface: eth1
-node-name: ${node_name}

templates/master_config.yaml.tpl

@@ -1,16 +0,0 @@
-cluster-init: true
-disable-cloud-controller: true
-disable:
-- servicelb
-- local-storage
-flannel-iface: eth1
-node-ip: ${node_ip}
-advertise-address: ${node_ip}
-tls-san: ${node_ip}
-kubelet-arg: "cloud-provider=external"
-token: ${token}
-node-name: ${node_name}
-%{ if !allow_scheduling_on_control_plane }
-node-taint:
-- node-role.kubernetes.io/master:NoSchedule
-%{ endif }

templates/server_config.yaml.tpl

@@ -1,16 +0,0 @@
-server: ${first_control_plane_url}
-disable-cloud-controller: true
-disable:
-- servicelb
-- local-storage
-flannel-iface: eth1
-node-ip: ${node_ip}
-advertise-address: ${node_ip}
-tls-san: ${node_ip}
-kubelet-arg: "cloud-provider=external"
-token: ${token}
-node-name: ${node_name}
-%{ if !allow_scheduling_on_control_plane }
-node-taint:
-- node-role.kubernetes.io/master:NoSchedule
-%{ endif }