Setting arrays of maps with --set

[boosh]

Output of helm version:

Client: &version.Version{SemVer:"v2.10.0", GitCommit:"9ad53aac42165a5fadc6c87be0dea6b115f93090", GitTreeState:"clean"}
Server: &version.Version{SemVer:"v2.10.0", GitCommit:"9ad53aac42165a5fadc6c87be0dea6b115f93090", GitTreeState:"clean"}

Output of kubectl version:

Client Version: version.Info{Major:"1", Minor:"8", GitVersion:"v1.8.1", GitCommit:"f38e43b221d08850172a9a4ea785a86a3ffa3b3a", GitTreeState:"clean", BuildDate:"2017-10-12T00:45:05Z", GoVersion:"go1.9.1", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"10", GitVersion:"v1.10.0", GitCommit:"fc32d2f3698e36b93322a3465f63a14e9f0eaead", GitTreeState:"clean", BuildDate:"2018-03-26T16:44:10Z", GoVersion:"go1.9.3", Compiler:"gc", Platform:"linux/amd64"}

Cloud Provider/Platform (AKS, GKE, Minikube etc.): Minikube/any

I've got a similar issue as in #1987 which was closed. I keep coming across charts where I need to set lists of maps on the command line, generally to configure TLS ingresses. E.g. Keycloak:

  ingress:
    tls: []
    # - hosts:
    #     - keycloak.example.com
#   secretName: tls-keycloak

How can these be set on the command line? I need to dynamically set the host name depending on my environment but so far can't find a way to do it. I don't want to have to create a values-<env>.yaml file for every environment I install in because apart from this most settings can be set on the command line and I want my charts to be portable (e.g. use the same chart for multiple clients, with the domain name parameterised).

I've tried all of the following but they all fail:

helm lint --set keycloak.tls.hosts={keycloak.localhost}
helm lint --set keycloak.tls[0].hosts={keycloak.localhost}
helm lint --set keycloak.tls={hosts={keycloak.localhost}}

This is quite a common requirement, specifically to dynamically configure ingress TLS. Is it possible to do this? If not, please add it.

Thanks

[moikot]

How about this:
helm lint --set keycloak.tls[0].hosts[0]=keycloak.localhost ?

[boosh]

No, I get the same error:

panic: interface conversion: interface {} is map[string]interface {}, not []interface {}

goroutine 1 [running]:
k8s.io/helm/pkg/strvals.(*parser).key(0xc4201b4860, 0xc420432780, 0xc4209f9278, 0x7) ... (truncated)

[jascott1]

Hi @boosh

Looking at the values file, you are missing ingress key in your set path. So it would be more like keycloak.ingress.tls[0].hosts[0] or similar.

[idursun]

@boosh If you are using zsh, then you need to escape square brackets like \[0\].