Should the Windows installer skip service installation and fail on a start if the ErlSrv RabbitMQ registry key already exists?

[tkarpli]

Community Support Policy

• I have read RabbitMQ's Community Support Policy
• I run RabbitMQ 4.x, the only series currently covered by community support
• I promise to provide all relevant information (versions, logs from all nodes, rabbitmq-diagnostics output, detailed reproduction steps)

RabbitMQ version used

4.0.7

Erlang version used

27.2.x

Operating system (distribution) used

Windows Server 2019

How is RabbitMQ deployed?

Windows installer

rabbitmq-diagnostics status output

See https://www.rabbitmq.com/docs/cli to learn how to use rabbitmq-diagnostics

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Logs from node 1 (with sensitive values edited out)

See https://www.rabbitmq.com/docs/logging to learn how to collect logs

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Logs from node 2 (if applicable, with sensitive values edited out)

See https://www.rabbitmq.com/docs/logging to learn how to collect logs

# PASTE LOG HERE, BETWEEN BACKTICKS

Logs from node 3 (if applicable, with sensitive values edited out)

See https://www.rabbitmq.com/docs/logging to learn how to collect logs

# PASTE LOG HERE, BETWEEN BACKTICKS

rabbitmq.conf

See https://www.rabbitmq.com/docs/configure#config-location to learn how to find rabbitmq.conf file location

# PASTE rabbitmq.conf HERE, BETWEEN BACKTICKS

Steps to deploy RabbitMQ cluster

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Steps to reproduce the behavior in question

1. Install RabbitMQ
2. Export registry key Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Ericsson\Erlang\ErlSrv\1.1\RabbitMQ
3. Uninstall RabbitMQ
4. If the key doesn't exist, import it
5. Run the setup again (rabbitmq-server)

advanced.config

See https://www.rabbitmq.com/docs/configure#config-location to learn how to find advanced.config file location

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Application code

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Kubernetes deployment file

# Relevant parts of K8S deployment that demonstrate how RabbitMQ is deployed
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What problem are you trying to solve?

Running rabbitmq-server if the "Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Ericsson\Erlang\ErlSrv\1.1\RabbitMQ" registry key exists, doesn't install RabbitMQ service and a message box with error message: "rabbitmq-service.bat start exited with code 1." is displayed.
The RabbitMQ service is not actually installed by the setup

To resolve this issue, simply delete the registry key before running the RabbitMQ installation.

1. I'm not sure how the registry ended up in this state—perhaps the uninstaller didn’t remove the key properly? I was uninstalling RabbitMQ 3.10.25 completely from a server and installing 4.0.7 from scratch.
2. If that's the case, is the installer behaving as intended in this scenario?

[michaelklishin]

@tkarpli this sounds like a good idea. Feel free to take a look at what kind of changes that might take.

The Windows installer packaging code can be found in the rabbitmq/rabbitmq-packaging repository.