New Dockerfile & instance: Flower

The flower container image can be used
to analyze and manage celery tasks.

docker-compose.yml

@@ -100,3 +100,19 @@ services:
       - cachito-api
       - nexus
       - rabbitmq
+
+  flower:
+    build:
+      context: .
+      dockerfile: ./docker/Dockerfile-flower
+    entrypoint:
+      - /usr/local/bin/flower-waits-for-cachito.sh
+      - http://cachito-api:8080
+    command:
+      - /usr/local/bin/flower
+      - --port=5555
+      - --broker=amqp://cachito:cachito@rabbitmq:5672//
+      - --broker_api=http://cachito:cachito@rabbitmq:15672/api/
+      - --basic_auth=cachito:cachito
+    ports:
+    - 8083:5555

docker/Dockerfile-flower

@@ -0,0 +1,11 @@
+FROM registry.fedoraproject.org/fedora:33
+LABEL maintainer="Red Hat"
+
+RUN dnf -y install \
+    --setopt=deltarpm=0 \
+    --setopt=install_weak_deps=false \
+    --setopt=tsflags=nodocs \
+    python3-pip
+RUN pip3 install flower==0.9.7
+
+COPY ./docker/flower-waits-for-cachito.sh /usr/local/bin/

docker/flower-waits-for-cachito.sh

@@ -0,0 +1,14 @@
+#!/bin/sh
+set -eu
+
+cachito_api=$1
+shift
+
+until curl --fail --silent --show-error "${cachito_api}/api/v1/status/short"; do
+    echo "Cachito is unavailable - sleeping"
+    sleep 3
+done
+
+echo "Cachito is up - proceeding"
+
+exec "$@"