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continuous-integrationcontinuous-deploymentsap-commerce-cloudblue-green-deployment
Alexey
Alexey

Reputation: 1539

Ho to do blue/green deployment for hybris?

I want to deploy hybris builds with zero down time. Our technical architecture consist of two frontend servers, two backend servers, two master/slave solr clusters, but a single DB server (MS SQL 2012). A new build may require patch execution which changes the DB schema.

Would it be possible to achieve this in a single DB landscape?

If two DB's are required (blue and green), then what is the best practice for DB replication in case of hybris?

Upvotes: 0

Views: 1739

Answers (2)

Sebastian
Sebastian

Reputation: 1783

Hybris does provide a rolling update feature (when you're running it in a cluster environment). This is targeted to allow for zero downtime.

You can find more information on the hybris help pages, e.g. https://help.hybris.com/6.5.0/hcd/8c455268866910149b25f7b53d1af3e1.html

Looking at the first picture there it seems to be pretty much fitting for the architecture you describe.

(But to be honest I have no experience with it, so I can't tell you whether or or how well it works :) )

If you have risky changes or end up needing to rollback your rolled out update you will have to do quite a bit of db cleanup etc.

From that perspective a blue/green setup might sound better although with db replication you would end up with the same problem (as your updated schema would be replicated as well I assume).

Upvotes: 3

mkysoft
mkysoft

Reputation: 5758

Hybris only adding new columns to db, never change their type or remove them. So single DB can be OK. I didn't test this using store front while updating system. I think it will be OK. On the other hand you need development for empty/null check for new attributes in development.

Upvotes: 1

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