351dac725d
RabbitMQ nodes must all be stopped prior to a major/minor version
upgrade [1]. The role does this by distinguishing between the upgrader
node and the rest in separate stop and start tasks.
Upgrades can fail when more than one member of rabbitmq_all are not
members of the cluster. This is due to a bug fixed for greenfield
deployments by 5dc67955f0. The same fix
was not applied to upgrades because major/minor upgrades require all
RabbitMQ nodes to be stopped which is incompatible with serialising the
role in isolation.
This change uses a play to stop all but one of the nodes, prior to
running the rabbitmq_server role, and then serialises the running of
the role so that one node is upgraded at a time. This minimises the
downtime as much as possible while allowing the role to be applied to
one node at a time.
[1] http://www.rabbitmq.com/clustering.html#upgrading
Change-Id: Icca5cb1a96f83063223b6ddbeb02eeb562b0931b
44 lines
1.2 KiB
YAML
44 lines
1.2 KiB
YAML
---
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# Copyright 2016, Rackspace US, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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- name: Gather facts
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hosts: "all"
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user: root
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gather_facts: true
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# The cluster must be stopped when doing major/minor upgrades
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# http://www.rabbitmq.com/clustering.html#upgrading
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- name: Stop RabbitMQ nodes that are not the upgrader
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hosts: rabbitmq_all[1:]
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serial: 1
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max_fail_percentage: 0
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user: root
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tasks:
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- name: "Stop RabbitMQ"
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service:
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name: "rabbitmq-server"
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state: "stopped"
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when: rabbitmq_upgrade | default(false) | bool
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- name: Install RabbitMQ server
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hosts: "{{ rabbitmq_host_group }}"
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serial: 1
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user: root
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gather_facts: True
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roles:
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- role: rabbitmq_server
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vars_files:
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- test-vars.yml
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