docker_systemd_service/templates/unit.j2

# {{ ansible_managed }}
{%- macro create_docker_flags(flags) %}
{% for item in flags %}
{{ create_docker_flag(item) }}
{% endfor %}
{% endmacro -%}

{%- macro create_docker_flag(item) %}
{%- if item is mapping %}
{% set key = item.keys() | first %}
{% set value = item[key] %}
{%- if value.__class__.__name__ == 'list' %}
{% for val in value %}
--{{ key }} "{{ val }}" \{% if not loop.last +%}
{% endif %}{% endfor %}
{%- else %}
--{{ key }} "{{ value }}" \
{%- endif %}
{%- elif  item is string %}
--{{ item }} \
{%- endif -%}
{% endmacro %}

{% set service_systemd_options_keys = docker_systemd_service_systemd_options | selectattr("key") | map(attribute="key") | list %}
[Unit]
{% for key, value in docker_systemd_service_systemd_unit_options | dictsort %}
{{ key }}={{ value }}
{% endfor %}

[Service]
{% for item in docker_systemd_service_systemd_options %}
{{ item['key'] }}={{ item['value'] }}
{% endfor %}
{% if not 'EnvironmentFile' in service_systemd_options_keys %}
EnvironmentFile={{ docker_systemd_service_sysconf_dir }}/{{ docker_systemd_service_container_name }}
{% endif %}
{% if not 'ExecStartPre' in service_systemd_options_keys %}
ExecStartPre=-{{ docker_systemd_service_docker_path }} rm -f {{ docker_systemd_service_container_name }}
{% endif %}
{% if not 'ExecStart' in service_systemd_options_keys %}
ExecStart={{ docker_systemd_service_docker_path }} run --name {{ docker_systemd_service_container_name }} \
--rm \
--env-file {{ docker_systemd_service_sysconf_dir }}/{{ docker_systemd_service_container_name }} \
{{ create_docker_flags(docker_systemd_service_flags) -}}
{{- docker_systemd_service_image -}}{{ ' ' if docker_systemd_service_container_cmd else '' }}{% if docker_systemd_service_container_cmd is string %}{{ docker_systemd_service_container_cmd | trim }}{% else %}{{ docker_systemd_service_container_cmd | join(' ') | trim }}{% endif %}
{% endif +%}
{% if not 'ExecStop' in service_systemd_options_keys %}
ExecStop={{ docker_systemd_service_docker_path }} stop {{ docker_systemd_service_container_name }}
{% endif %}
{% if container_start_post is defined %}
ExecStartPost=-{{ container_start_post }}
{% endif %}
{% if not 'SyslogIdentifier' in service_systemd_options_keys %}
SyslogIdentifier={{ docker_systemd_service_container_name }}
{% endif %}
{% if not 'Restart' in service_systemd_options_keys %}
Restart=always
{% endif %}
{% if not 'RestartSec' in service_systemd_options_keys %}
RestartSec=10s
{% endif %}

[Install]
WantedBy=docker.service