mirror_pagure_ansible: Add a role for this service

Signed-off-by: Pierre-Yves Chibon <pingou@pingoured.fr>

roles/mirror_pagure_ansible/tasks/main.yml

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+- name: Install packages                  
+  package: state=present name={{ item }}
+  with_items:
+  - fedora-messaging
+  - git
+  tags:
+  - packages
+  - mirror_pagure_ansible
+
+
+# Create the user the service will run under
+
+- name: Setup pagure user
+  user:
+     name: mirror_pagure_ansible
+     shell: /sbin/nologin
+     comment: "mirror_pagure_ansible User"
+  tags: 
+  - mirror_pagure_ansible
+  - mirror_pagure_ansible/user
+
+# configure all the fedora-messaging files
+
+- name: Create /etc/pki/fedora-messaging
+  file:
+    dest: /etc/pki/fedora-messaging
+    mode: 0775
+    owner: root
+    group: root
+    state: directory
+  tags:
+  - config
+  - mirror_pagure_ansible
+
+- name: deploy pagure/rabbitmq certificate
+  copy: src={{ item.src }}
+        dest=/etc/pki/fedora-messaging/{{ item.dest }}
+        owner={{ item.owner }} group={{ item.group}} mode={{ item.mode }}
+  with_items:
+    - src: "{{private}}/files/rabbitmq/production/pki/issued/mirror_pagure_ansible{{env_suffix}}.crt"
+      dest: mirror_pagure_ansible.crt
+      owner: mirror_pagure_ansible
+      group: mirror_pagure_ansible
+      mode: "0644"
+    - src: "{{private}}/files/rabbitmq/production/pki/private/mirror_pagure_ansible{{env_suffix}}.key"
+      dest: mirror_pagure_ansible.key
+      owner: mirror_pagure_ansible
+      group: mirror_pagure_ansible
+      mode: "0600"
+    - src: "{{private}}/files/rabbitmq/production/pki/ca.crt"
+      dest: cacert.pem
+      owner: mirror_pagure_ansible
+      group: mirror_pagure_ansible                                          
+      mode: "0644"
+  tags:
+  - pagure
+  - fedora-messaging
+
+- name: Setup mirror_pagure_ansible fedora-messaging config
+  template:
+    src: mirror_pagure_ansible.cfg
+    dest: /etc/fedora-messaging/mirror_pagure_ansible.toml
+    owner: mirror_pagure_ansible
+    group: mirror_pagure_ansible
+    mode: 0640
+  tags:
+  - config
+  - mirror_pagure_ansible
+
+# Install the script
+
+- name: Create /usr/local/libexec/mirror_pagure_ansible
+  file:
+    dest: /usr/local/libexec/mirror_pagure_ansible
+    mode: 0775
+    owner: root
+    group: root
+    state: directory
+  tags:
+  - config
+  - mirror_pagure_ansible
+
+- name: Install the consumer
+  template:
+    src: mirror_from_pagure_bus.py
+    dest: /usr/local/libexec/mirror_pagure_ansible/mirror_from_pagure_bus.py
+  tags:
+  - packages
+  - mirror_pagure_ansible
+
+
+# Install and start the service
+
+- name: Install the dedicated service file for mirror_pagure_ansible
+  template:
+    src: mirror_pagure_ansible.service
+    dest: /etc/systemd/system/mirror_pagure_ansible.service
+    owner: root
+    group: root
+    mode: 0755
+  notify:
+  - reload systemd
+  tags:
+  - config
+  - mirror_pagure_ansible
+
+- name: Enable and started the service
+  service:
+    name: mirror_pagure_ansible.service
+    enabled: yes
+    state: started
+  tags:
+  - config
+  - mirror_pagure_ansible
+

roles/mirror_pagure_ansible/templates/mirror_from_pagure_bus.py

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+"""
+This script runs in a loop and clone or update the clone of the ansible repo
+hosted in pagure.io
+"""
+from __future__ import print_function
+
+import datetime
+import logging
+import os
+import sched
+import subprocess
+import sys
+import time
+
+from fedora_messaging import api, config
+
+
+_log = logging.getLogger(__name__)
+
+
+
+def run_command(command, cwd=None):
+    """ Run the specified command in a specific working directory if one
+    is specified.
+
+    :arg command: the command to run
+    :type command: list
+    :kwarg cwd: the working directory in which to run this command
+    :type cwd: str or None
+    """
+    output = None
+    try:
+        output = subprocess.check_output(command, cwd=cwd, stderr=subprocess.PIPE)
+    except subprocess.CalledProcessError as e:
+        _log.error("Command `%s` return code: `%s`", " ".join(command), e.returncode)
+        _log.error("stdout:\n-------\n%s", e.stdout)
+        _log.error("stderr:\n-------\n%s", e.stderr)
+        raise
+
+    return output
+
+
+class MirrorFromPagure(object):
+    """
+    A fedora-messaging consumer update a local mirror of a repo hosted on
+    pagure.io.
+
+    Three configuration key is used from fedora-messaging's
+    "consumer_config" key:
+     - "mirror_folder", which indicates where mirrors should be store
+     - "urls", which is a list of mirrors to keep up to date
+     - "triggers_name", the fullname of the project (ie: name or namespace/name)
+       that we want to trigger a refresh of our clone on
+
+     ::
+
+        [consumer_config]
+        mirror_folder = "mirrors"
+        trigger_names = ["Fedora-Infra/ansible"]
+        urls = ["https://pagure.io/Fedora-Infra/ansible.git"]
+    """
+
+    def __init__(self):
+        """Perform some one-time initialization for the consumer."""
+        self.path = config.conf["consumer_config"]["mirror_folder"]
+        self.urls = config.conf["consumer_config"]["urls"]
+        self.trigger_names = config.conf["consumer_config"]["trigger_names"]
+
+        if not os.path.exists(self.path):
+            raise OSError("No folder %s found on disk" % self.path)
+
+    def __call__(self, message, cnt=0):
+        """
+        Invoked when a message is received by the consumer.
+
+        Args:
+            message (fedora_messaging.api.Message): The message from AMQP.
+        """
+        _log.info("Received topic: %s", message.topic)
+        if message.topic == "io.pagure.prod.pagure.git.receive":
+            repo_name = message.body.get("repo", {}).get("fullname")
+            if repo_name not in self.trigger_names:
+                _log.info("Not the pagure repo of interest, bailing")
+                return
+        elif message.topic == "org.fedoraproject.prod.infragit.receive":
+            pass
+        else:
+            _log.info("Unexpected topic received: %s", message.topic)
+            return
+
+        try:
+            for url in self.urls:
+                _log.info("Syncing %s", url)
+                name = url.rsplit("/", 1)[-1]
+
+                dest_folder = os.path.join(self.path, name)
+                if not os.path.exists(dest_folder):
+                    _log.info("   Cloning as new %s", url)
+                    cmd = ["git", "clone", "--mirror", url]
+                    run_command(cmd, cwd=self.path)
+
+                _log.info(
+                    "   Running git fetch with transfer.fsckObjects=1 in %s", 
+                    dest_folder
+                )
+                cmd = ["git", "-c", "transfer.fsckObjects=1", "fetch"]
+                run_command(cmd, cwd=dest_folder)
+
+        except Exception:
+            _log.exception("Something happened while calling git")
+            if cnt >= 3:
+                raise
+            _log.info("  Re-running in 10 seconds")
+            time.sleep(10)
+            self.__call__(message, cnt=cnt+1)

roles/mirror_pagure_ansible/templates/mirror_pagure_ansible.cfg

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+amqp_url = "amqps://mirror_pagure_ansible{{ env_suffix }}:@rabbitmq{{ env_suffix }}.fedoraproject.org/%2Fpubsub"
+
+publish_exchange = "amq.topic"
+passive_declares = true
+
+callback = "mirror_from_pagure_bus:MirrorFromPagure"
+
+# Don't use topic_prefix, since outgoing message topics are derived from incoming messages.
+# topic_prefix = ""
+
+# Note the double brackets below.
+# To add another binding, add another [[bindings]] section.
+[[bindings]]
+queue = "mirror_pagure_ansible{{ env_suffix }}"
+exchange = "amq.topic"
+routing_keys = [
+    "io.pagure.*.pagure.git.receive",
+]
+
+[tls]
+ca_cert = "/etc/pki/fedora-messaging/cacert.pem"
+keyfile = "/etc/pki/fedora-messaging/mirror_pagure_ansible-key.pem"
+certfile = "/etc/pki/fedora-messaging/mirror_pagure_ansible-cert.pem"
+
+[client_properties]
+app = "RoboSignatory"
+app_url = "https://pagure.io/Fedora-Infra/mirror_from_pagure"
+app_contacts_email = ["pingou@fedoraproject.org"]
+
+[queues."mirror_pagure_ansible{{ env_suffix }}"]
+durable = true
+auto_delete = false
+exclusive = false
+arguments = {}
+
+[consumer_config]
+mirror_folder = "/srv/"
+trigger_names = ["fedora-infrastructure"]
+urls = [
+    "https://pagure.io/fedora-infrastructure.git",
+]
+
+[qos]
+prefetch_size = 0
+prefetch_count = 25
+
+[log_config]
+version = 1
+disable_existing_loggers = true
+
+[log_config.formatters.simple]
+format = "[%(levelname)s %(name)s] %(message)s"
+
+[log_config.handlers.console]
+class = "logging.StreamHandler"
+formatter = "simple"
+stream = "ext://sys.stdout"
+
+[log_config.loggers.fedora_messaging]
+level = "INFO"
+propagate = false
+handlers = ["console"]
+
+[log_config.loggers.twisted]
+level = "INFO"
+propagate = false
+handlers = ["console"]
+
+[log_config.loggers.pika]
+level = "WARNING"
+propagate = false
+handlers = ["console"]
+
+# If your consumer sets up a logger, you must add a configuration for it
+# here in order for the messages to show up. e.g. if it set up a logger
+# called 'example_printer', you could do:
+[log_config.loggers.mirror_from_pagure_bus]
+level = "DEBUG"
+propagate = false
+handlers = ["console"]
+
+[log_config.root]
+level = "ERROR"
+handlers = ["console"]

roles/mirror_pagure_ansible/templates/mirror_pagure_ansible.service

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+[Unit]
+Description=Fedora Messaging consumer
+Documentation=http://fedora-messaging.readthedocs.io/
+
+[Service]
+Type=simple
+Environment="PYTHONPATH=/usr/local/libexec/mirror_pagure_ansible"
+ExecStart=/usr/bin/fedora-messaging --conf /etc/fedora-messaging/mirror_pagure_ansible.toml consume
+Restart=on-failure
+User=mirror_pagure_ansible
+Group=mirror_pagure_ansible
+
+[Install]
+WantedBy=multi-user.target
+