Generate a Vault Agent development configuration file

Use the Vault CLI to create a basic development configuration file to run Vault Agent in process supervisor mode.

Development configuration files include an auto_auth section that reference a token file based on the Vault token used to authenticate the CLI command. Token files are convenient for local testing but are not appropriate for in production. Always use a robust auto-authentication method in production.

Assumptions

You have set up a kv v2 plugin.
Your authentication token has read permissions for the kv v2 plugin.

Use vault agent generate-config to create a development configuration file with environment variable templates:

$ vault agent generate-config    -type "env-template"                                \    -exec "<path_to_child_process> <list_of_arguments>" \    -namespace "<plugin_namespace>"                     \    -path "<mount_path_to_kv_plugin_1>"                 \    -path "<mount_path_to_kv_plugin_2>"                 \    ...    -path "<mount_path_to_kv_plugin_N>"                 \    <config_file_name>

For example:

$ vault agent generate-config             \         -type="env-template"             \         -exec="./payment-app 'wf-test'"  \         -namespace="testing"             \         -path="shared/dev/*"             \         -path="private/ci/integration"   \         agent-config.hclSuccessfully generated "agent-config.hcl" configuration file!Warning: the generated file uses 'token_file' authentication method, which is not suitable for production environments.

The configuration file includes env_template entries for each key stored at the explicit paths and any key encountered while recursing through paths ending with /*. Template keys have the form <final_path_segment>_<key_name>.

For example:

auto_auth {  method {    type = "token_file"    config {      token_file_path = "/home/<username>/.vault-token"    }  }}template_config {  static_secret_render_interval = "5m"  exit_on_retry_failure         = true  max_connections_per_host      = 10}vault {  address = "http://192.168.0.1:8200"}env_template "SQUARE_API_PROD" {  contents             = "{{ with secret \"shared/data/dev/square-api\" }}{{ .Data.data.prod }}{{ end }}"  error_on_missing_key = true}env_template "SQUARE_API_SANDBOX" {  contents             = "{{ with secret \"shared/data/dev/square-api\" }}{{ .Data.data.sandbox }}{{ end }}"  error_on_missing_key = true}env_template "SQUARE_API_SMOKE" {  contents             = "{{ with secret \"shared/data/dev/square-api\" }}{{ .Data.data.smoke }}{{ end }}"  error_on_missing_key = true}env_template "SEEDS_SEED1" {  contents             = "{{ with secret \"shared/data/dev/seeds\" }}{{ .Data.data.seed1 }}{{ end }}"  error_on_missing_key = true}env_template "SEEDS_SEED2" {  contents             = "{{ with secret \"shared/data/dev/seeds\" }}{{ .Data.data.seed2 }}{{ end }}"  error_on_missing_key = true}env_template "DEV_POSTMAN" {  contents             = "{{ with secret \"private/data/ci/integration\" }}{{ .Data.data.postman }}{{ end }}"  error_on_missing_key = true}exec {  command                   = ["./payment-app", "'wf-test'"]  restart_on_secret_changes = "always"  restart_stop_signal       = "SIGTERM"}