https://developer.hashicorp.com/vault/tutorials
https://developer.hashicorp.com/vault/tutorials/getting-started
https://developer.hashicorp.com/vault/tutorials/getting-started/getting-started-secrets-engines
    ???
https://developer.hashicorp.com/vault/tutorials/getting-started/getting-started-first-secret
    curl \
        -H "X-Vault-Token: f3b09679-3001-009d-2b80-9c306ab81aa6" \
        -H "X-Vault-Namespace: ns1/ns2/" \
        -X GET \
        http://127.0.0.1:8200/v1/secret/foo
    <or...>
    curl \
        -H "X-Vault-Token: f3b09679-3001-009d-2b80-9c306ab81aa6" \
        -X GET \
        http://127.0.0.1:8200/v1/ns1/ns2/secret/foo

    vault kv put secret/hello foo=world
        secret - arbitary secret
    vault kv get [-format=json] secret/hello
    vault kv delete secret/hello


https://developer.hashicorp.com/vault/tutorials/getting-started/getting-started-dev-server
    vault server -dev
    export VAULT_ADDR='http://127.0.0.1:8200'
    save the unseakey.txt
    export VAULT_DEV_ROOT_TOKEN_ID=...
    vault status
https://developer.hashicorp.com/vault/tutorials/getting-started/getting-started-install
https://developer.hashicorp.com/vault/tutorials/getting-started/getting-started-intro


https://www.bogotobogo.com/DevOps/Docker/Docker-Vault-Consul.php
https://www.bogotobogo.com/DevOps/Docker/Docker-Vault-Consul-B.php