​Encryption

Kestra 0.15.0 and later supports encryption of sensitive data.

This allows inputs and outputs to be automatically encrypted and decrypted when they are stored in the database.

kestra.encryption

To enable encryption, you need to provide a base64-encoded secret key in the configuration:

kestra:
  encryption:
    secret-key: BASE64_ENCODED_STRING_OF_32_CHARCTERS

To generate a 32-character string and then base64 encode it, you can use the defacto standard for cryptography, OpenSSL:

openssl rand -base64 32

If you don't have OpenSSL installed, you can use the following Bash commands to generate a base64-encoded 32-character encryption key:

random_string=$(LC_ALL=C tr -dc 'A-Za-z0-9' < /dev/urandom | head -c 32)
echo "$random_string" | base64

If you run Kestra with Docker-Compose, here is how you can add that key in the KESTRA_CONFIGURATION environment variable in your docker-compose.yml file:

  kestra:
    image: kestra/kestra:latest-full
    environment:
      KESTRA_CONFIGURATION: |
        kestra:
          encryption:
            secret-key: NWRhUDc5TERWY2QyMDhSSHhfeWYzbjJpNE5vb3M5NnY=

Once the secret key is set, you can use an input and output of type SECRET:

id: my_secret_flow
namespace: company.team

inputs:
  - id: secret
    type: SECRET

tasks:
  - id: mytask
    type: io.kestra.plugin.core.log.Log
    message: task that needs the secret to connect to an external system

outputs:
  - id: secret_output
    type: SECRET
    value: "{{ inputs.secret }}"

When executing this flow, you will see a masked field:

In the Execution Overview tab, you will see a masked value of the secret.