Manage Rancher users, global roles, tokens and settings #8
@@ -7,9 +7,18 @@ provider. Mirrors the `terraform-authentik` pattern.
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## Managed Resources
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- **Keycloak(OIDC) auth config** — Authentik OIDC login for Rancher.
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- **Global role bindings** — Authentik group → Rancher global role.
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- **Users** — Rancher-local users and their global roles.
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- **Global roles** — custom Rancher global roles.
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- **Tokens** — API tokens for the identity Terraform authenticates as.
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- **Settings** — Rancher settings such as `server-url`.
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## Configuration
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Every kind is discovered from YAML by `config/config.hcl`: the file name is the
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object's key/name and the file body holds its attributes. Adding a file is the
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only step needed to manage a new object; an empty directory means an empty map.
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`config/keycloakoidc.yaml` defines the auth provider. The OAuth client secret is
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read from Vault (kv-v2) — the same secret Authentik sets on its `rancher`
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provider — and is never committed.
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@@ -18,6 +27,67 @@ provider — and is never committed.
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roles are granted to users/groups separately. This avoids locking the admin out
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when the provider is first enabled.
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### `config/global_role_bindings/<group>.yaml`
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```yaml
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global_role_id: admin
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```
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### `config/users/<username>.yaml`
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```yaml
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name: Some Person # optional display name, defaults to the file name
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enabled: true # optional, default true
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must_change_password: false # optional, default false
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password_vault: # required — rancher2_user requires a password
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mount: kv
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path: service/rancher/users/someperson
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key: password # optional, default "password"
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global_role_bindings: # optional
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- user
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```
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The password is read from Vault **at plan time**, so seed the kv-v2 secret
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before adding the file, or the plan fails.
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### `config/roles/<name>.yaml`
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```yaml
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description: Read-only across all clusters
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new_user_default: false # optional, default false
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inherited_cluster_roles: # optional
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- view
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rules: # optional
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- api_groups: ["management.cattle.io"]
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resources: ["clusters"]
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verbs: ["get", "list", "watch"]
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# non_resource_urls and resource_names are also supported
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```
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### `config/tokens/<name>.yaml`
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```yaml
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description: CI token # optional, defaults to the file name
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ttl: 7776000 # optional, seconds
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renew: true # optional
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cluster_id: c-m-abcdefgh # optional, scopes the token to one cluster
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```
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> **Caveat:** `rancher2_token` has no user selector — `user_id` is computed by
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> the provider (14.1.1), not settable. Tokens declared here are minted for the
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> identity the rancher2 provider authenticates as (the admin token Terraform
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> runs with), **not** for users in `config/users/`. A token for another user has
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> to be created by that user. Token values land in Terraform state.
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### `config/settings/<name>.yaml`
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```yaml
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value: https://rancher.k8s.syd1.au.unkin.net
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```
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Rancher ships defaults for its settings, so an entry takes over an existing
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setting rather than creating a new one.
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## Usage
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```sh
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@@ -13,5 +13,25 @@ locals {
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trimsuffix(basename(file_path), ".yaml") => content
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if startswith(file_path, "global_role_bindings/")
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}
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users = {
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for file_path, content in local.all_configs :
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trimsuffix(basename(file_path), ".yaml") => content
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if startswith(file_path, "users/")
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}
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roles = {
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for file_path, content in local.all_configs :
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trimsuffix(basename(file_path), ".yaml") => content
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if startswith(file_path, "roles/")
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}
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tokens = {
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for file_path, content in local.all_configs :
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trimsuffix(basename(file_path), ".yaml") => content
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if startswith(file_path, "tokens/")
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}
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settings = {
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for file_path, content in local.all_configs :
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trimsuffix(basename(file_path), ".yaml") => content
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if startswith(file_path, "settings/")
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}
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}
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}
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@@ -0,0 +1,3 @@
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# Rancher's server-url setting. Must match the URL Rancher is reached on,
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# otherwise newly registered cluster agents dial the wrong endpoint.
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value: https://rancher.k8s.syd1.au.unkin.net
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@@ -19,4 +19,8 @@ terraform {
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inputs = {
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keycloakoidc = local.config.keycloakoidc
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global_role_bindings = local.config.global_role_bindings
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users = local.config.users
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global_roles = local.config.roles
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tokens = local.config.tokens
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settings = local.config.settings
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}
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@@ -52,3 +52,93 @@ resource "rancher2_global_role_binding" "group" {
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depends_on = [rancher2_auth_config_keycloak_oidc.this]
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}
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# Rancher-local users. rancher2_user makes `password` required, so each user's
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# password comes from a Vault kv-v2 secret rather than the repo. Vault data
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# sources resolve at plan time: seed the secret before adding the yaml.
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data "vault_kv_secret_v2" "user_password" {
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for_each = var.users
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mount = each.value.password_vault.mount
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name = each.value.password_vault.path
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}
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resource "rancher2_user" "this" {
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for_each = var.users
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username = each.key
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name = coalesce(each.value.name, each.key)
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enabled = each.value.enabled
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must_change_password = each.value.must_change_password
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password = data.vault_kv_secret_v2.user_password[each.key].data[each.value.password_vault.key]
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}
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# Flatten users -> their global roles into "<username>/<role>" keys so adding or
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# removing one role never re-indexes the others.
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locals {
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user_global_role_bindings = merge([
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for username, user in var.users : {
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for role in user.global_role_bindings :
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"${username}/${role}" => {
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username = username
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global_role_id = role
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}
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}
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]...)
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}
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resource "rancher2_global_role_binding" "user" {
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for_each = local.user_global_role_bindings
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# Binding name must be an RFC 1123 label, so lowercase it and swap the key's
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# "/" separator for "-".
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name = "akuser-${lower(replace(each.key, "/", "-"))}"
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global_role_id = each.value.global_role_id
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user_id = rancher2_user.this[each.value.username].id
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}
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# Custom global roles. Rules are optional: a role with none grants nothing on its
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# own and is useful purely as a container for inherited_cluster_roles.
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resource "rancher2_global_role" "this" {
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for_each = var.global_roles
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name = each.key
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description = each.value.description
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new_user_default = each.value.new_user_default
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inherited_cluster_roles = each.value.inherited_cluster_roles
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dynamic "rules" {
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for_each = each.value.rules
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content {
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api_groups = rules.value.api_groups
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resources = rules.value.resources
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verbs = rules.value.verbs
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non_resource_urls = rules.value.non_resource_urls
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resource_names = rules.value.resource_names
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}
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}
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}
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# CAVEAT: rancher2_token has no user selector — `user_id` is computed by the
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# provider at 14.1.1, not settable. Every token declared here is minted for the
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# identity the rancher2 provider authenticates as (the CI admin service account),
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# NOT for any user in config/users/. There is no way to mint a token on another
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# user's behalf through this provider; that has to be done by that user.
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# The token/secret_key values land in Terraform state, so treat state as secret.
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resource "rancher2_token" "this" {
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for_each = var.tokens
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description = coalesce(each.value.description, each.key)
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ttl = each.value.ttl
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renew = each.value.renew
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cluster_id = each.value.cluster_id
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}
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# Rancher settings, e.g. server-url. Rancher ships defaults for these, so an
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# entry here takes over an existing setting rather than creating a new one.
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resource "rancher2_setting" "this" {
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for_each = var.settings
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name = each.key
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value = each.value.value
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}
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@@ -32,3 +32,62 @@ variable "global_role_bindings" {
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}))
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default = {}
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}
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# Rancher-local users (config/users/<username>.yaml). Map key is the username.
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# rancher2_user requires a password, so every entry must point at a Vault kv-v2
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# secret holding one; the value is read at plan time, so the secret must exist
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# before a user yaml is added.
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variable "users" {
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type = map(object({
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name = optional(string, null) # display name, defaults to the username
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enabled = optional(bool, true)
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must_change_password = optional(bool, false)
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password_vault = object({
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mount = string
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path = string
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key = optional(string, "password")
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})
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# Global roles granted to this user, e.g. ["user", "admin"].
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global_role_bindings = optional(list(string), [])
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}))
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default = {}
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}
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# Custom Rancher global roles (config/roles/<name>.yaml). Map key is the role
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# name, which is also the id other configs bind to via global_role_id.
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variable "global_roles" {
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type = map(object({
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description = optional(string, null)
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new_user_default = optional(bool, false)
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inherited_cluster_roles = optional(list(string), [])
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rules = optional(list(object({
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api_groups = optional(list(string), [])
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resources = optional(list(string), [])
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verbs = optional(list(string), [])
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non_resource_urls = optional(list(string), [])
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resource_names = optional(list(string), [])
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})), [])
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}))
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default = {}
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}
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# API tokens (config/tokens/<name>.yaml). Map key names the Terraform resource
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# only. rancher2_token has no user selector (user_id is computed at 14.1.1), so
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# every token here is minted for the identity the provider authenticates as.
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variable "tokens" {
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type = map(object({
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description = optional(string, null) # defaults to the map key
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ttl = optional(number, null) # seconds; 0/null = provider default
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renew = optional(bool, null)
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cluster_id = optional(string, null) # scope to one cluster, null = global
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}))
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default = {}
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}
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# Rancher settings (config/settings/<name>.yaml). Map key is the setting name.
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variable "settings" {
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type = map(object({
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value = string
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}))
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default = {}
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}
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