provider/kubernetes: Allow defining custom config context (#12958)
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@ -66,6 +66,11 @@ func Provider() terraform.ResourceProvider {
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DefaultFunc: schema.EnvDefaultFunc("KUBE_CONFIG", "~/.kube/config"),
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Description: "Path to the kube config file, defaults to ~/.kube/config",
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},
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"config_context": {
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Type: schema.TypeString,
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Optional: true,
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DefaultFunc: schema.EnvDefaultFunc("KUBE_CTX", ""),
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},
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"config_context_auth_info": {
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Type: schema.TypeString,
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Optional: true,
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@ -141,22 +146,32 @@ func tryLoadingConfigFile(d *schema.ResourceData) (*restclient.Config, error) {
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loader := &clientcmd.ClientConfigLoadingRules{
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ExplicitPath: path,
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}
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overrides := &clientcmd.ConfigOverrides{}
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ctxSuffix := "; no context"
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ctxSuffix := "; default context"
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ctx, ctxOk := d.GetOk("config_context")
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authInfo, authInfoOk := d.GetOk("config_context_auth_info")
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cluster, clusterOk := d.GetOk("config_context_cluster")
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if authInfoOk || clusterOk {
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if ctxOk || authInfoOk || clusterOk {
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ctxSuffix = "; overriden context"
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if ctxOk {
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overrides.CurrentContext = ctx.(string)
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ctxSuffix += fmt.Sprintf("; config ctx: %s", overrides.CurrentContext)
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log.Printf("[DEBUG] Using custom current context: %q", overrides.CurrentContext)
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}
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overrides.Context = clientcmdapi.Context{}
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if authInfoOk {
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overrides.Context.AuthInfo = authInfo.(string)
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ctxSuffix += fmt.Sprintf("; auth_info: %s", overrides.Context.AuthInfo)
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}
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if clusterOk {
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overrides.Context.Cluster = cluster.(string)
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ctxSuffix += fmt.Sprintf("; cluster: %s", overrides.Context.Cluster)
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}
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ctxSuffix = fmt.Sprintf("; auth_info: %s, cluster: %s",
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overrides.Context.AuthInfo, overrides.Context.Cluster)
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log.Printf("[DEBUG] Using overidden context: %#v", overrides.Context)
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}
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log.Printf("[DEBUG] Using override context: %#v", *overrides)
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cc := clientcmd.NewNonInteractiveDeferredLoadingClientConfig(loader, overrides)
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cfg, err := cc.ClientConfig()
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@ -33,8 +33,28 @@ resource "kubernetes_namespace" "example" {
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There are generally two ways to configure the Kubernetes provider.
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### File config
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The provider always first tries to load **a config file** from a given
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(or default) location - this requires valid `config_context_auth_info` & `config_context_cluster`.
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(or default) location. Depending on whether you have current context set
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this _may_ require `config_context_auth_info` and/or `config_context_cluster`
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and/or `config_context`.
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#### Setting default config context
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Here's an example for how to set default context and avoid all provider configuration:
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```
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kubectl config set-context default-system \
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--cluster=chosen-cluster \
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--user=chosen-user
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kubectl config use-context default-system
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```
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Read [more about `kubectl` in the official docs](https://kubernetes.io/docs/user-guide/kubectl-overview/).
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### Statically defined credentials
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The other way is **statically** define all the credentials:
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@ -64,5 +84,6 @@ The following arguments are supported:
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* `client_key` - (Optional) PEM-encoded client certificate key for TLS authentication. Can be sourced from `KUBE_CLIENT_KEY_DATA`.
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* `cluster_ca_certificate` - (Optional) PEM-encoded root certificates bundle for TLS authentication. Can be sourced from `KUBE_CLUSTER_CA_CERT_DATA`.
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* `config_path` - (Optional) Path to the kube config file. Can be sourced from `KUBE_CONFIG`. Defaults to `~/.kube/config`.
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* `config_context` - (Optional) Context to choose from the config file. Can be sourced from `KUBE_CTX`.
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* `config_context_auth_info` - (Optional) Authentication info context of the kube config (name of the kubeconfig user, `--user` flag in `kubectl`). Can be sourced from `KUBE_CTX_AUTH_INFO`.
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* `config_context_cluster` - (Optional) Cluster context of the kube config (name of the kubeconfig cluster, `--cluster` flag in `kubectl`). Can be sourced from `KUBE_CTX_CLUSTER`.
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