» Kubernetes Provider

The Kubernetes (K8S) provider is used to interact with the resources supported by Kubernetes. The provider needs to be configured with the proper credentials before it can be used.

Use the navigation to the left to read about the available resources.

» Example Usage 

provider "kubernetes" {
  config_context_auth_info = "ops"
  config_context_cluster   = "mycluster"
}

resource "kubernetes_namespace" "example" {
  metadata {
    name = "my-first-namespace"
  }
}

» Kubernetes versions

Both backward and forward compatibility with Kubernetes API is mostly defined by the official K8S Go library (prior to 1.1 release) and client Go library which we ship with Terraform. Below are versions of the library bundled with given versions of Terraform.

  • Terraform <= 0.9.6 (prior to provider split) - Kubernetes 1.5.4
  • Terraform 0.9.7 (prior to provider split) < 1.1 (provider version) - Kubernetes 1.6.1
  • 1.1+ - Kubernetes 1.7

» Authentication

There are generally two ways to configure the Kubernetes provider.

» File config

The provider always first tries to load a config file from a given (or default) location. Depending on whether you have current context set this may require config_context_auth_info and/or config_context_cluster and/or config_context.

» Setting default config context

Here's an example for how to set default context and avoid all provider configuration:

kubectl config set-context default-system \
  --cluster=chosen-cluster \
  --user=chosen-user

kubectl config use-context default-system

Read more about kubectl in the official docs.

» Statically defined credentials

The other way is statically define TLS certificate credentials:

provider "kubernetes" {
  host = "https://104.196.242.174"

  client_certificate     = "${file("~/.kube/client-cert.pem")}"
  client_key             = "${file("~/.kube/client-key.pem")}"
  cluster_ca_certificate = "${file("~/.kube/cluster-ca-cert.pem")}"
}

or username and password (HTTP Basic Authorization):

provider "kubernetes" {
  host = "https://104.196.242.174"

  username = "username"
  password = "password"
}

If you have both valid configuration in a config file and static configuration, the static one is used as override. i.e. any static field will override its counterpart loaded from the config.

» Argument Reference

The following arguments are supported:

  • host - (Optional) The hostname (in form of URI) of Kubernetes master. Can be sourced from KUBE_HOST. Defaults to https://localhost.
  • username - (Optional) The username to use for HTTP basic authentication when accessing the Kubernetes master endpoint. Can be sourced from KUBE_USER.
  • password - (Optional) The password to use for HTTP basic authentication when accessing the Kubernetes master endpoint. Can be sourced from KUBE_PASSWORD.
  • insecure - (Optional) Whether server should be accessed without verifying the TLS certificate. Can be sourced from KUBE_INSECURE. Defaults to false.
  • client_certificate - (Optional) PEM-encoded client certificate for TLS authentication. Can be sourced from KUBE_CLIENT_CERT_DATA.
  • client_key - (Optional) PEM-encoded client certificate key for TLS authentication. Can be sourced from KUBE_CLIENT_KEY_DATA.
  • cluster_ca_certificate - (Optional) PEM-encoded root certificates bundle for TLS authentication. Can be sourced from KUBE_CLUSTER_CA_CERT_DATA.
  • config_path - (Optional) Path to the kube config file. Can be sourced from KUBE_CONFIG or KUBECONFIG. Defaults to ~/.kube/config.
  • config_context - (Optional) Context to choose from the config file. Can be sourced from KUBE_CTX.
  • 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.
  • 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.
  • token - (Optional) Token of your service account. Can be sourced from KUBE_TOKEN.
  • load_config_file - (Optional) By default the local config (~/.kube/config) is loaded when you use this provider. This option at false disable this behaviour. Can be sourced from KUBE_LOAD_CONFIG_FILE.