can't get key /something/with_an_underscore from env backend

[bvdeenen]

I have a key defined as /kafka/broker_id/host1 and I can't find a way to set it from the env backend.
Is there no way ?
I've tried export KAFKA_BROKER_ID_KAFKA1=... but I get (with -log-level debug)

confd[98]: DEBUG Key Map: map[string]string{"/kafka/broker/id/kafka1":"5"}
confd[98]: DEBUG Using source template /etc/confd/templates/server.properties.tmpl
confd[98]: DEBUG Compiling source template /etc/confd/templates/server.properties.tmpl
confd[98]: ERROR template: server.properties.tmpl:24:13: executing "server.properties.tmpl" at <getv (print "/kafka/...>: error calling getv: key does not exist: /kafka/broker_id/kafka1

Is there a workaround, apart from removing the underscores in my keys?

[HeavyHorst]

For the env backend every _ is replaced with an / at the moment. Your key is /kafka/broker/id/kafka1.
There is no way to treat the _ not as a path separator.

[stela]

This bit me too, I have an existing docker image with which works together with the consul backend, containing
{{getv "/xmpp_domain"}}
Now I'd like to use the "env" backend (for a kubernetes environment) instead, but the same docker image.
Prefix-matching is done against XMPP_DOMAIN which is the name of my environment variable. However, before returning the configuration mappings, the key is converted to /xmpp/domain which later on causes errors: ... error calling getv: key does not exist: /xmpp_domain

When you request for a key containing an underscore, that's probably what you want the backend to return. What would happen if you modified env/client.go like this:

			if strings.HasPrefix(envKey, k) {
				envPostfix := envKey[len(k):]
				vars[key + clean(envPostfix)] = envValue
			}

instead of
vars[clean(envKey)] = envValue?

At last the integration tests in integration/env/test.sh still pass after that change.

Update: above isn't quite correct, keys returned have trailing/intermediate slashes, I'll try to make a proper pull request for this...

[stela]

Posted pull request #567, let me know what you think about it.