feat(vault-jwt): Add Vault JWT/OIDC module (#297)
Co-authored-by: Mathias Fredriksson <mafredri@gmail.com>pull/301/head
Muhammad Atif Ali
7 months ago
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GitHub
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162808760d
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fb81c8969f
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---
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display_name: Hashicorp Vault Integration (JWT)
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description: Authenticates with Vault using a JWT from Coder's OIDC provider
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icon: ../.icons/vault.svg
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maintainer_github: coder
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partner_github: hashicorp
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verified: true
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tags: [helper, integration, vault, jwt, oidc]
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---
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# Hashicorp Vault Integration (JWT)
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This module lets you authenticate with [Hashicorp Vault](https://www.vaultproject.io/) in your Coder workspaces by reusing the [OIDC](https://coder.com/docs/admin/auth#openid-connect) access token from Coder's OIDC authentication method. This requires configuring the Vault [JWT/OIDC](https://developer.hashicorp.com/vault/docs/auth/jwt#configuration) auth method.
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```tf
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module "vault" {
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source = "registry.coder.com/modules/vault-jwt/coder"
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version = "1.0.19"
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agent_id = coder_agent.example.id
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vault_addr = "https://vault.example.com"
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vault_jwt_role = "coder" # The Vault role to use for authentication
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}
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```
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Then you can use the Vault CLI in your workspaces to fetch secrets from Vault:
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```shell
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vault kv get -namespace=coder -mount=secrets coder
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```
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or using the Vault API:
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```shell
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curl -H "X-Vault-Token: ${VAULT_TOKEN}" -X GET "${VAULT_ADDR}/v1/coder/secrets/data/coder"
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```
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## Examples
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### Configure Vault integration with a non standard auth path (default is "jwt")
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```tf
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module "vault" {
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source = "registry.coder.com/modules/vault-jwt/coder"
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version = "1.0.19"
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agent_id = coder_agent.example.id
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vault_addr = "https://vault.example.com"
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vault_jwt_auth_path = "oidc"
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vault_jwt_role = "coder" # The Vault role to use for authentication
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}
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```
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### Map workspace owner's group to a Vault role
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```tf
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data "coder_workspace_owner" "me" {}
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module "vault" {
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source = "registry.coder.com/modules/vault-jwt/coder"
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version = "1.0.19"
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agent_id = coder_agent.example.id
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vault_addr = "https://vault.example.com"
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vault_jwt_role = data.coder_workspace_owner.me.groups[0]
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}
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```
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### Install a specific version of the Vault CLI
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```tf
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module "vault" {
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source = "registry.coder.com/modules/vault-jwt/coder"
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version = "1.0.19"
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agent_id = coder_agent.example.id
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vault_addr = "https://vault.example.com"
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vault_jwt_role = "coder" # The Vault role to use for authentication
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vault_cli_version = "1.17.5"
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}
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```
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import { describe } from "bun:test";
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import { runTerraformInit, testRequiredVariables } from "../test";
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describe("vault-jwt", async () => {
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await runTerraformInit(import.meta.dir);
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testRequiredVariables(import.meta.dir, {
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agent_id: "foo",
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vault_addr: "foo",
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vault_jwt_role: "foo",
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});
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});
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terraform {
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required_version = ">= 1.0"
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required_providers {
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coder = {
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source = "coder/coder"
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version = ">= 0.12.4"
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}
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}
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}
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# Add required variables for your modules and remove any unneeded variables
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variable "agent_id" {
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type = string
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description = "The ID of a Coder agent."
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}
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variable "vault_addr" {
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type = string
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description = "The address of the Vault server."
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}
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variable "vault_jwt_auth_path" {
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type = string
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description = "The path to the Vault JWT auth method."
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default = "jwt"
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}
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variable "vault_jwt_role" {
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type = string
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description = "The name of the Vault role to use for authentication."
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}
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variable "vault_cli_version" {
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type = string
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description = "The version of Vault to install."
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default = "latest"
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validation {
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condition = can(regex("^(latest|[0-9]+\\.[0-9]+\\.[0-9]+)$", var.vault_cli_version))
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error_message = "Vault version must be in the format 0.0.0 or latest"
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}
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}
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resource "coder_script" "vault" {
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agent_id = var.agent_id
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display_name = "Vault (GitHub)"
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icon = "/icon/vault.svg"
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script = templatefile("${path.module}/run.sh", {
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CODER_OIDC_ACCESS_TOKEN : data.coder_workspace_owner.me.oidc_access_token,
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VAULT_JWT_AUTH_PATH : var.vault_jwt_auth_path,
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VAULT_JWT_ROLE : var.vault_jwt_role,
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VAULT_CLI_VERSION : var.vault_cli_version,
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})
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run_on_start = true
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start_blocks_login = true
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}
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resource "coder_env" "vault_addr" {
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agent_id = var.agent_id
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name = "VAULT_ADDR"
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value = var.vault_addr
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}
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data "coder_workspace_owner" "me" {}
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#!/usr/bin/env bash
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# Convert all templated variables to shell variables
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VAULT_CLI_VERSION=${VAULT_CLI_VERSION}
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VAULT_JWT_AUTH_PATH=${VAULT_JWT_AUTH_PATH}
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VAULT_JWT_ROLE=${VAULT_JWT_ROLE}
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CODER_OIDC_ACCESS_TOKEN=${CODER_OIDC_ACCESS_TOKEN}
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fetch() {
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dest="$1"
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url="$2"
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if command -v curl > /dev/null 2>&1; then
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curl -sSL --fail "$${url}" -o "$${dest}"
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elif command -v wget > /dev/null 2>&1; then
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wget -O "$${dest}" "$${url}"
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elif command -v busybox > /dev/null 2>&1; then
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busybox wget -O "$${dest}" "$${url}"
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else
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printf "curl, wget, or busybox is not installed. Please install curl or wget in your image.\n"
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exit 1
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fi
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}
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unzip_safe() {
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if command -v unzip > /dev/null 2>&1; then
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command unzip "$@"
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elif command -v busybox > /dev/null 2>&1; then
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busybox unzip "$@"
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else
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printf "unzip or busybox is not installed. Please install unzip in your image.\n"
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exit 1
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fi
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}
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install() {
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# Get the architecture of the system
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ARCH=$(uname -m)
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if [ "$${ARCH}" = "x86_64" ]; then
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ARCH="amd64"
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elif [ "$${ARCH}" = "aarch64" ]; then
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ARCH="arm64"
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else
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printf "Unsupported architecture: $${ARCH}\n"
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return 1
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fi
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# Fetch the latest version of Vault if VAULT_CLI_VERSION is 'latest'
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if [ "$${VAULT_CLI_VERSION}" = "latest" ]; then
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LATEST_VERSION=$(curl -s https://releases.hashicorp.com/vault/ | grep -v 'rc' | grep -oE 'vault/[0-9]+\.[0-9]+\.[0-9]+' | sed 's/vault\///' | sort -V | tail -n 1)
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printf "Latest version of Vault is %s.\n\n" "$${LATEST_VERSION}"
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if [ -z "$${LATEST_VERSION}" ]; then
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printf "Failed to determine the latest Vault version.\n"
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return 1
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fi
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VAULT_CLI_VERSION=$${VAULT_CLI_VERSION}
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fi
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# Check if the vault CLI is installed and has the correct version
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installation_needed=1
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if command -v vault > /dev/null 2>&1; then
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CURRENT_VERSION=$(vault version | grep -oE '[0-9]+\.[0-9]+\.[0-9]+')
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if [ "$${CURRENT_VERSION}" = "$${VAULT_CLI_VERSION}" ]; then
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printf "Vault version %s is already installed and up-to-date.\n\n" "$${CURRENT_VERSION}"
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installation_needed=0
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fi
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fi
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if [ $${installation_needed} -eq 1 ]; then
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# Download and install Vault
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if [ -z "$${CURRENT_VERSION}" ]; then
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printf "Installing Vault CLI ...\n\n"
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else
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printf "Upgrading Vault CLI from version %s to %s ...\n\n" "$${CURRENT_VERSION}" "${VAULT_CLI_VERSION}"
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fi
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fetch vault.zip "https://releases.hashicorp.com/vault/$${VAULT_CLI_VERSION}/vault_$${VAULT_CLI_VERSION}_linux_$${ARCH}.zip"
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if [ $? -ne 0 ]; then
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printf "Failed to download Vault.\n"
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return 1
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fi
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if ! unzip_safe vault.zip; then
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printf "Failed to unzip Vault.\n"
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return 1
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fi
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rm vault.zip
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if sudo mv vault /usr/local/bin/vault 2> /dev/null; then
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printf "Vault installed successfully!\n\n"
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else
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mkdir -p ~/.local/bin
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if ! mv vault ~/.local/bin/vault; then
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printf "Failed to move Vault to local bin.\n"
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return 1
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fi
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printf "Please add ~/.local/bin to your PATH to use vault CLI.\n"
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fi
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fi
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return 0
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}
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TMP=$(mktemp -d)
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if ! (
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cd "$TMP"
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install
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); then
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echo "Failed to install Vault CLI."
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exit 1
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fi
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rm -rf "$TMP"
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# Authenticate with Vault
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printf "🔑 Authenticating with Vault ...\n\n"
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echo "$${CODER_OIDC_ACCESS_TOKEN}" | vault write auth/"$${VAULT_JWT_AUTH_PATH}"/login role="$${VAULT_JWT_ROLE}" jwt=-
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printf "🥳 Vault authentication complete!\n\n"
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printf "You can now use Vault CLI to access secrets.\n"
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