Upgrade Erlang 18.0 to 22.0.x

vineeth695 2019-07-04 10:23:31 UTC #1

Keywords: RabbitMQ - AWS - Technical issue - Upgrade
bnsupport ID: 3523a811-de37-872d-b34b-a95b66ce0cde
Description:
We are using Bitnami Ubuntu 14.04.5 LTS image for AWS Instance. The current version of RabbitMQ and Erland are as below.
RabbitMQ 3.6.9, Erlang 18.0

We want to upgrade RabbitMQ to the latest version - 3.7.15. As a pre-requisite, we need to upgrade erlang to at least 20.3. But I couldn't find a supporting document to upgrade erlang. Please, can you advise?

Vineeth

jota 2019-07-05 07:52:51 UTC #2

Hi @vineeth695,

Thank you for using Bitnami. We have this guide in our documentation that explains how to upgrade RabbitMQ in which we explain how to backup the RabbitMQ files

https://docs.bitnami.com/aws/infrastructure/rabbitmq/administration/upgrade/

You could launch a new Bitnami instance and migrate the files from the current deployment to that new one. This way you will be updating the RabbitMQ and Erlang version to the latest ones. You will also update Ubuntu to 16.04.

Let us know if you have any questions.

Thanks

vineeth695 2019-07-05 10:46:38 UTC #3

Hi,

Thanks for responding to the query.

I am looking for a way to use the existing instance and upgrade erlang in the same system. Is there a way to achieve this?

Also we have a cluster of 2 RabbitMQ instances. So if we are launching new instance, and migrate the required files (var, etc, and rabbitmq_home) would the instances join the cluster after launch? Or do we need to manually join them to the cluster?

Thanks,
Vineeth

jota 2019-07-08 06:51:00 UTC #4

Hi @vineeth695,

I'm sorry but there is not any straightforward way to update the base components in a Bitnami stack. They all run independently of the system's packages so you can't use the system's package manager to update them. You will need to compile the new version from scratch and that can cause many problems during the process.

You will probably need to rejoin them after migrating the data.

Let us know if you have any questions

ajish.cherian 2019-07-09 15:24:58 UTC #5

I have upgraded the erlang package in the bitnami machine.
dpkg -S shows version 22.0.4
but in rabbitmqctl status it shows as 18.
Anything else to be done in rabbitmq to point to the right erlang version.

I am attaching the screenshots which shows the rabbitmq status

and the erlang version
is this

root@ip-XXxXxXxXx:/opt/bitnami/rabbitmq/sbin# dpkg -s erlang
Package: erlang
Status: install ok installed
Priority: optional
Section: interpreters
Installed-Size: 50
Maintainer: Debian Erlang Packagers pkg-erlang-devel@lists.alioth.debian.org
Architecture: all
Version: 1:22.0.4-1
Depends: erlang-base | erlang-base-hi

appreciate your help here

jota 2019-07-10 08:29:59 UTC #6

Hi @ajish.cherian,

As I mentioned before, there is not any straightforward way to upgrade Erlang in the Bitnami instances. The installation doesn't use the system's packages to work and that's why it's not using the Erlang you installed using the package manager.

ajish.cherian 2019-07-10 09:05:17 UTC #7

Got you. What would be the best way to updgrade RabbitMq and its erlang version on bitnami OS on AWS

regards
Ajish Cherian

jota 2019-07-10 11:06:05 UTC #8

This guide in our documentation explains how to upgrade RabbitMQ but you could launch the latest version of the Bitnami solution and migrate the data based on the information there

https://docs.bitnami.com/aws/infrastructure/rabbitmq/administration/upgrade/

I hope it helps

ajish.cherian 2019-07-10 11:28:55 UTC #9

Thanks for your reply. Unfortunately this doesn't upgrade the Erlang
version right . We tried these steps to upgrade to 3.7.x and the rabbitmq
didn't start up.

jota 2019-07-10 11:48:32 UTC #10

Hi @ajish.cherian,

I didn't say that you needed to follow that guide step by step. The guide explains which files and folders you need to backup when upgrading RabbitMQ. You will need to launch a new instance (with the latest version of RabbitMQ and Erlang) and migrate the data from the current instance you have to the new one. The data to migrate is the one you already back up

ajish.cherian 2019-07-10 11:54:24 UTC #11

Sure will try this way @jota. Thank you.

system 2019-07-24 11:54:31 UTC #12

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