[Unit]
Description=Lightweight Kubernetes
Documentation=https://k3s.io
{% for requires_unit in k3s_service_requires %}
Requires={{ requires_unit }}
{% endfor %}
Wants=network-online.target
{% for wants_unit in k3s_service_wants %}
Wants={{ wants_unit }}
{% endfor %}
{% for before_unit in k3s_service_before %}
Before={{ before_unit }}
{% endfor %}
After=network-online.target
{% for after_unit in k3s_service_after %}
After={{ after_unit }}
{% endfor %}

[Service]
Type={{ 'notify' if k3s_control_node else 'exec' }}
{% if k3s_service_env_vars is defined and k3s_service_env_vars is iterable %}
{% for env_var in k3s_service_env_vars %}
Environent={{ env_var }}={{ k3s_service_env_vars[env_var] }}
{% endfor %}
{% endif %}
{% if k3s_service_env_file is defined and k3s_service_env_file %}
EnvironmentFile={{ k3s_service_env_file }}
{% endif %}
ExecStartPre=-/sbin/modprobe br_netfilter
ExecStartPre=-/sbin/modprobe overlay
{% filter regex_replace('\s+', ' ') %}
{% filter replace('\n', ' ') %}
ExecStart={{ k3s_install_dir }}/k3s
{% if k3s_debug is defined and k3s_debug %}
    --debug
{% endif %}
{% if k3s_control_node %}
    server
    {% if (k3s_etcd_datastore is defined and k3s_etcd_datastore) and (k3s_primary_control_node is not defined or not k3s_primary_control_node) and k3s_controller_list | length > 1 %}
        --server https://{{ k3s_registration_address }}:{{ k3s_control_plane_port | default(6443) | string }}
    {% endif %}
    {% if k3s_server is defined %}
        --config {{ k3s_config_file }}
    {% endif %}
    {% if k3s_control_node and not k3s_primary_control_node %}
        --token-file {{ k3s_token_location }}
    {% endif %}
{% else %}
    agent
    --server https://{{ k3s_registration_address }}:{{ k3s_control_plane_port | default(6443) | string }}
    --token-file {{ k3s_token_location }}
    {% if k3s_agent is defined %}
        --config {{ k3s_config_file }}
    {% endif %}
{% endif %}
{% endfilter %}
{% endfilter %}

KillMode=process
Delegate=yes
LimitNOFILE=1048576
LimitNPROC=infinity
LimitCORE=infinity
TasksMax=infinity
TimeoutStartSec=0
Restart=always
RestartSec=5s

[Install]
WantedBy=multi-user.target