cassandra: Add documentation on how to upgrade a cassandra cluster

With the current static cluster.

Refs. swh/infra/sysadm-environment#5389 (closed)

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• 9f815060...9540c9a0 - 3 commits from branch master
• 762a2b1d - cassandra: Add documentation on how to upgrade a cassandra cluster

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• 1e0a68a3 - cassandra: Add documentation on how to upgrade a cassandra cluster

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marked this merge request as ready

@jenkins retry build

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ok but why though, the output is unclear.

Maybe this... [1]. Adapted code block to 'shell' instead of 'log' parser.

[2024-12-02T13:12:42.162Z] /var/lib/jenkins/agent-workdir/workspace/DDOC/builds/swh-docs/docs/sysadm/data-silos/cassandra/upgrade.rst:83: WARNING: Pygments lexer name 'log' is not known

Adding a description of the automatic method could be more complete.

approved this merge request

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• 9640172b - cassandra: Add documentation on how to upgrade a cassandra cluster

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• 78f19407 - cassandra: Add documentation on how to upgrade a cassandra cluster

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merged