Retry logic for creating cassandra session in vault config

[Saurabh Singh]

Hi,

I am using cassandra as backend for my vault service. Both vault and cassandra are running as containers. 

When I restart vault and cassandra together then cassandra takes couple of minutes to come up.

Vault tries to create session but it fails with error:-

gocql: unable to dial control conn 127.0.0.1: dial tcp 127.0.0.1:9042: connect: connection refused

the reason for this failure is simple- cassandra is still not ready.

My question is is there any way to add a retry logic for creating cassandra session in vault config?

my current config for cassandra as backend:

"backend": {

                "cassandra": {

                        "hosts": "127.0.0.1",

                        "consistency": "LOCAL_QUORUM",

                        "protocol_version": 4,

                        "keyspace": "vault",

                        "table": "entries",

                        "connection_timeout": 10

                }

        }

Thanks and regards

Saurabh

[Nick Cabatoff]

Hi Saurabh,

Whatever is running your services should restart them on failure, no?  What's wrong with relying on that?

Alternatively, depending on how you're orchestrating your services, you could declare the vault container to be dependent on the cassandra container and the former wouldn't get launched until the latter reports as ready.

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[Saurabh Singh]

Thanks Nick.

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