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path: root/docker/prometheus/prometheus-mtail/Dockerfile.j2
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FROM {{ namespace }}/{{ image_prefix }}prometheus-base:{{ tag }}
{% block labels %}
LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build_date }}"
{% endblock %}

{% block prometheus_mtail_header %}{% endblock %}

{% block prometheus_mtail_version %}

ARG prometheus_mtail_version=3.0.0-rc50
{% if debian_arch == 'amd64' %}
ARG prometheus_mtail_url=https://github.com/google/mtail/releases/download/v${prometheus_mtail_version}/mtail_${prometheus_mtail_version}_linux_x86_64.tar.gz
{% else %}
ARG prometheus_mtail_url=https://github.com/google/mtail/releases/download/v${prometheus_mtail_version}/mtail_${prometheus_mtail_version}_linux_{{debian_arch}}.tar.gz
{% endif %}
{% endblock %}

{% block prometheus_mtail_install %}
RUN curl -o /tmp/mtail.tar.gz ${prometheus_mtail_url} \
    && tar xvf /tmp/mtail.tar.gz -C /opt/ \
    && rm -f /tmp/mtail.tar.gz
{% endblock %}

{% block prometheus_mtail_footer %}{% endblock %}
{% block footer %}{% endblock %}

# NOTE(dszumski): We run as root so that mtail can scrape root owned logs
# such as /var/log/secure which are mounted into the container as read only
# for auditing purposes. Longer term we should use a more secure mechanism
# for tailing these logs.
USER root