Create database scheme in Cassandra automatically

[yurishkuro]

Historically, Jaeger's integration with different databases was not consistent in how the database initialization happens. For example, when using Cassandra the user first needs to run a "create schema" script [1]. But running with Elasticsearch does not require a script, it's done automatically in the code on collector startup.

We want to add similar initialization to Cassandra implementation. This will be especially helpful in Jaeger v2 when it's deployed by K8s Operator from OTEL Collector, which does not have the built-in ability to run pre-initialization steps.

[1] /plugin/storage/cassandra/schema/create.sh

[kairveeehh]

hiii @yurishkuro I would like to take up this issue under LFX , could you assign it to me and let me know any further resources if there?

[hellspawn679]

so basically we need to remove the schema folder dependency and initialize with similar to es

[Ali-Alnosairi]

/assign

[Spraveen8-chary]

• Add schema initialization to Jaeger's Cassandra setup.
• Update the collector startup to handle schema creation.
• Test the changes in different deployment scenarios

[akstron]

Hi @yurishkuro , I am working on it and wanted some suggestions. For this task we have to create keyspace, types and tables after cassandra session initialization. Do you recommend extracting the queries from *.tmpl files (which is how it is done currently by running create.sh script) or should we write the queries in the code itself?

[yurishkuro]

It's fine to read from template files, we just need to embed them into the binary.