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Signed-off-by: Knut Ahlers <knut@ahlers.me>
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# Luzifer / vault2env
`vault2env` is a really small utility to transfer fields of a key in [Vault](https://www.vaultproject.io/) into the environment. It uses the [`app-role`](https://www.vaultproject.io/docs/auth/approle.html), [`app-id` authentication mechanism](https://www.vaultproject.io/docs/auth/app-id.html) or simple [token authentication](https://www.vaultproject.io/docs/auth/token.html) to identify itself with the Vault server, fetches all fields in the specified key and returns export directives for bash / zsh. That way you can do `eval` stuff and pull those fields into your ENV.
`vault2env` is a really small utility to transfer fields of a key in [Vault](https://www.vaultproject.io/) into the environment. It uses the [`app-role`](https://www.vaultproject.io/docs/auth/approle.html) or simple [token authentication](https://www.vaultproject.io/docs/auth/token.html) to identify itself with the Vault server, fetches all fields in the specified keys and returns export directives for bash / zsh. That way you can do `eval` stuff and pull those fields into your ENV. If you don't want to use export directives you also can pass commands to `vault2env` to be executed using those environment variables.
## Usage
In general this program can either output your ENV variables to use with `eval` or similar or it can run a program with populated environment.
```
# vault2env [secret path] [command]
# vault2env --key=<secret path> <command>
<program is started, you see its output>
# vault2env --export [secret path]
# vault2env --export --key=<secret path>
export ...
```
### Using evironment variables
```bash
# export VAULT_ADDR="https://127.0.0.1:8200"
# export VAULT_APP_ID="29c8febe-49f5-4620-a177-20dff0fda2da"
# export VAULT_USER_ID="54d24f66-6ecb-4dcc-bdb7-0241a955f1df"
# vault2env --export secret/my/path/with/keys
# export VAULT_ROLE_ID="29c8febe-49f5-4620-a177-20dff0fda2da"
# export VAULT_SECRET_ID="54d24f66-6ecb-4dcc-bdb7-0241a955f1df"
# vault2env --export --key=secret/my/path/with/keys
export FIRST_KEY="firstvalue"
export SECOND_KEY="secondvalue"
# eval $(vault2env --export secret/my/path/with/keys)
# eval $(vault2env --export --key=secret/my/path/with/keys)
# echo "${FIRST_KEY}"
firstvalue
```
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The command does differ only with its parameters specified for the different authentication mechanisms:
- When using AppRole you need to specify `--vault-role-id` and optionally `--vault-secret-id` if you're using the `bind_secret_id` flag for your AppRole
- When using AppID specify `--vault-app-id` and `--vault-user-id`
- When using Token auth only specify `--vault-token`
```bash
# vault2env --vault-addr="..." --vault-app-id="..." --vault-user-id="..." secret/my/path/with/keys
# vault2env --vault-addr="..." --vault-app-id="..." --vault-user-id="..." --key=secret/my/path/with/keys
export FIRST_KEY="firstvalue"
export SECOND_KEY="secondvalue"
```