grafana: on aarch64 use 5.2.4 version from upstream

Upstream started building Grafana for arm64 a while ago. So let's use it
instead of someone's build.

Change-Id: Ia5359cd86022f2475301407d62a5ad4e1b275c13

docker/base/Dockerfile.j2

@@ -341,7 +341,6 @@ COPY apt_preferences.{{ base_distro }} /etc/apt/preferences
     ] %}
     {% set remote_apt_keys = [
       'http://obs.linaro.org/ERP:/18.06/Debian_9/Release.key',
-      'https://bintray.com/user/downloadSubjectPublicKey?username=bintray',
       'https://download.docker.com/linux/debian/gpg',
       'https://packagecloud.io/rabbitmq/rabbitmq-server/gpgkey'
     ] %}

docker/base/sources.list.debian

@@ -10,9 +10,6 @@ deb http://obs.linaro.org/ERP:/18.06/Debian_9/ ./
 
 deb [arch=amd64] https://packagecloud.io/grafana/stable/debian/ stretch main
 
-# Unofficial repository for grafana (LP: #1768585).
-deb [arch=arm64] https://dl.bintray.com/fg2it/deb-arm64/ stretch main
-
 # elasticsearch (arch:all), logstash (arch:all), kibana (arch:amd64)
 deb [arch=amd64] https://artifacts.elastic.co/packages/5.x/apt stable main
 

docker/grafana/Dockerfile.j2

@@ -5,16 +5,34 @@ LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build
 
 {% import "macros.j2" as macros with context %}
 
+{% set grafana_packages = ['grafana'] %}
+
 {% if base_arch not in ['aarch64', 'x86_64'] %}
 
 RUN echo 'There are no Grafana external repositories for {{ base_arch }}' \
     && /bin/false
 
+{% elif base_arch in ['aarch64'] %}
+
+    {% if base_distro in ['centos'] %}
+
+        {% set grafana_packages = [
+            'https://s3-us-west-2.amazonaws.com/grafana-releases/release/grafana-5.2.4-1.aarch64.rpm'
+        ] %}
+
+    {% elif base_distro in ['debian', 'ubuntu'] %}
+
+        {% set grafana_packages = [
+            'libfontconfig',
+            'https://s3-us-west-2.amazonaws.com/grafana-releases/release/grafana_5.2.4_arm64.deb'
+        ] %}
+
+    {% endif %}
+
 {% endif %}
 
 {{ macros.configure_user(name='grafana', homedir='/usr/share/grafana') }}
 
-{% set grafana_packages = ['grafana'] %}
 {{ macros.install_packages(grafana_packages | customizable("packages")) }}
 
 WORKDIR /usr/share/grafana