# Bitnami Secure Image for HashiCorp Consul

> HashiCorp Consul is a tool for discovering and configuring services in your infrastructure.

[Overview of HashiCorp Consul](https://consul.io)
Trademarks: This software listing is packaged by Bitnami. The respective trademarks mentioned in the offering are owned by the respective companies, and use of them does not imply any affiliation or endorsement.

## TL;DR

```console
docker run --name consul bitnami/consul:latest
```

## Using `docker-compose.yml`

The docker-compose.yaml file of this container can be found in the [Bitnami Containers repository](https://github.com/bitnami/containers/).

[https://github.com/bitnami/containers/tree/main/bitnami/consul/docker-compose.yml](https://github.com/bitnami/containers/tree/main/bitnami/consul/docker-compose.yml)

Please be aware this file has not undergone internal testing. Consequently, we advise its use exclusively for development or testing purposes. For production-ready deployments, we highly recommend utilizing its associated [Bitnami Helm chart](https://github.com/bitnami/charts/tree/main/bitnami/consul).

## Why use Bitnami Secure Images?

Those are hardened, minimal CVE images built and maintained by Bitnami. Bitnami Secure Images are based on the cloud-optimized, security-hardened enterprise [OS Photon Linux](https://vmware.github.io/photon/). Why choose BSI images?

- Hardened secure images of popular open source software with Near-Zero Vulnerabilities
- Vulnerability Triage & Prioritization with VEX Statements, KEV and EPSS Scores
- Compliance focus with FIPS, STIG, and air-gap options, including secure bill of materials (SBOM)
- Software supply chain provenance attestation through in-toto
- First class support for the internet’s favorite Helm charts

Each image comes with valuable security metadata. You can view the metadata in [our public catalog here](https://app-catalog.vmware.com/bitnami/apps). Note: Some data is only available with [commercial subscriptions to BSI](https://bitnami.com/).

![Alt text](https://github.com/bitnami/containers/blob/main/BSI%20UI%201.png?raw=true "Application details")
![Alt text](https://github.com/bitnami/containers/blob/main/BSI%20UI%202.png?raw=true "Packaging report")

If you are looking for our previous generation of images based on Debian Linux, please see the [Bitnami Legacy registry](https://hub.docker.com/u/bitnamilegacy).

## How to deploy HashiCorp Consul in Kubernetes?

Deploying Bitnami applications as Helm Charts is the easiest way to get started with our applications on Kubernetes. Read more about the installation in the [Bitnami HashiCorp Consul Chart GitHub repository](https://github.com/bitnami/charts/tree/master/bitnami/consul).

## Why use a non-root container?

Non-root container images add an extra layer of security and are generally recommended for production environments. However, because they run as a non-root user, privileged tasks are typically off-limits. Learn more about non-root containers [in our docs](https://techdocs.broadcom.com/us/en/vmware-tanzu/application-catalog/tanzu-application-catalog/services/tac-doc/apps-tutorials-work-with-non-root-containers-index.html).

## Supported tags and respective `Dockerfile` links

Learn more about the Bitnami tagging policy and the difference between rolling tags and immutable tags [in our documentation page](https://techdocs.broadcom.com/us/en/vmware-tanzu/application-catalog/tanzu-application-catalog/services/tac-doc/apps-tutorials-understand-rolling-tags-containers-index.html).

## Get this image

The Bitnami HashiCorp Consul Docker image is only available to [Bitnami Secure Images](https://bitnami.com) customers.

## Persisting your application

If you remove the container all your data and configurations will be lost, and the next time you run the image the database will be reinitialized. To avoid this loss of data, you should mount a volume that will persist even after the container is removed.

For persistence you should mount a volume at the `/bitnami` path. The above examples define a docker volume namely `consul_data`. The HashiCorp Consul application state will persist as long as this volume is not removed.

To avoid inadvertent removal of this volume you can [mount host directories as data volumes](https://docs.docker.com/engine/tutorials/dockervolumes/). Alternatively you can make use of volume plugins to host the volume data.

> **NOTE** As this is a non-root container, the mounted files and directories must have the proper permissions for the UID `1001`.

## Connecting to other containers

Using [Docker container networking](https://docs.docker.com/engine/userguide/networking/), a different server running inside a container can easily be accessed by your application containers and vice-versa.

Containers attached to the same network can communicate with each other using the container name as the hostname.

## Configuration

The following section describes the supported environment variables

### Environment variables

The following tables list the main variables you can set.

#### Customizable environment variables

| Name                            | Description                                         | Default Value |
|---------------------------------|-----------------------------------------------------|---------------|
| `CONSUL_RPC_PORT_NUMBER`        | Consul RPC port number.                             | `8300`        |
| `CONSUL_HTTP_PORT_NUMBER`       | Consul HTTP port number.                            | `8500`        |
| `CONSUL_HTTPS_PORT_NUMBER`      | Consul HTTPS port number.                           | `-1`          |
| `CONSUL_DNS_PORT_NUMBER`        | Consul DNS port number.                             | `8600`        |
| `CONSUL_AGENT_MODE`             | Consul agent mode.                                  | `server`      |
| `CONSUL_DISABLE_KEYRING_FILE`   | Disable keyring file in Consul.                     | `false`       |
| `CONSUL_SERF_LAN_ADDRESS`       | LAN address for Serf daemon.                        | `0.0.0.0`     |
| `CONSUL_SERF_LAN_PORT_NUMBER`   | LAN port for Serf daemon.                           | `8301`        |
| `CONSUL_CLIENT_LAN_ADDRESS`     | LAN address for Consul clients.                     | `0.0.0.0`     |
| `CONSUL_RETRY_JOIN_ADDRESS`     | Consul node retry join address.                     | `127.0.0.1`   |
| `CONSUL_RETRY_JOIN_WAN_ADDRESS` | Consul retry join WAN address.                      | `127.0.0.1`   |
| `CONSUL_BIND_INTERFACE`         | Consul bind interface.                              | `nil`         |
| `CONSUL_BIND_ADDR`              | Consul bind address.                                | `nil`         |
| `CONSUL_ENABLE_UI`              | Enable User Interface in Consul.                    | `true`        |
| `CONSUL_BOOTSTRAP_EXPECT`       | Expect bootstrap in Consul.                         | `1`           |
| `CONSUL_RAFT_MULTIPLIER`        | Consul Raft multiplier.                             | `1`           |
| `CONSUL_LOCAL_CONFIG`           | Consul local configuration.                         | `nil`         |
| `CONSUL_GOSSIP_ENCRYPTION`      | Use gossip encryption in Consul.                    | `no`          |
| `CONSUL_GOSSIP_ENCRYPTION_KEY`  | Base64-encoded Consul gossip private symmetric key. | `nil`         |
| `CONSUL_DATACENTER`             | Consul datacenter name.                             | `dc1`         |
| `CONSUL_DOMAIN`                 | Consul domain.                                      | `consul`      |
| `CONSUL_NODE_NAME`              | Consul domain name.                                 | `nil`         |
| `CONSUL_DISABLE_HOST_NODE_ID`   | Disable host node ID.                               | `true`        |

#### Read-only environment variables

| Name                           | Description                                 | Value                                      |
|--------------------------------|---------------------------------------------|--------------------------------------------|
| `CONSUL_BASE_DIR`              | Consul installation directory.              | `${BITNAMI_ROOT_DIR}/consul`               |
| `CONSUL_CONF_DIR`              | Consul configuration directory.             | `${CONSUL_BASE_DIR}/conf`                  |
| `CONSUL_DEFAULT_CONF_DIR`      | Consul default configuration directory.     | `${CONSUL_BASE_DIR}/conf.default`          |
| `CONSUL_BIN_DIR`               | Consul binary directory.                    | `${CONSUL_BASE_DIR}/bin`                   |
| `CONSUL_CONF_FILE`             | Consul configuration file.                  | `${CONSUL_CONF_DIR}/consul.json`           |
| `CONSUL_ENCRYPT_FILE`          | Consul encryption configuration file.       | `${CONSUL_CONF_DIR}/encrypt.json`          |
| `CONSUL_LOCAL_FILE`            | Consul local configuration file.            | `${CONSUL_CONF_DIR}/local.json`            |
| `CONSUL_LOG_DIR`               | Directory where Consul logs are stored.     | `${CONSUL_BASE_DIR}/logs`                  |
| `CONSUL_LOG_FILE`              | Consul log file.                            | `${CONSUL_LOG_DIR}/consul.log`             |
| `CONSUL_VOLUME_DIR`            | Consul persistence directory.               | `/bitnami/consul`                          |
| `CONSUL_DATA_DIR`              | Consul directory where data is stored.      | `${CONSUL_VOLUME_DIR}`                     |
| `CONSUL_SSL_DIR`               | Consul SSL directory.                       | `${CONSUL_BASE_DIR}/certificates`          |
| `CONSUL_TMP_DIR`               | Consul temporary directory.                 | `${CONSUL_BASE_DIR}/tmp`                   |
| `CONSUL_PID_FILE`              | Path to the PID file for Consul.            | `${CONSUL_TMP_DIR}/consul.pid`             |
| `CONSUL_TEMPLATES_DIR`         | Consul templates directory.                 | `${CONSUL_BASE_DIR}/templates`             |
| `CONSUL_CONFIG_TEMPLATE_FILE`  | Consul configuration template file.         | `${CONSUL_TEMPLATES_DIR}/consul.json.tpl`  |
| `CONSUL_ENCRYPT_TEMPLATE_FILE` | Consul encrypt configuration template file. | `${CONSUL_TEMPLATES_DIR}/encrypt.json.tpl` |
| `CONSUL_LOCAL_TEMPLATE_FILE`   | Consul local configuration template file.   | `${CONSUL_TEMPLATES_DIR}/local.json.tpl`   |
| `CONSUL_INITSCRIPTS_DIR`       | Consul directory for init scripts.          | `/docker-entrypoint-initdb.d`              |
| `CONSUL_DAEMON_USER`           | Consul system user.                         | `consul`                                   |
| `CONSUL_DAEMON_GROUP`          | Consul system group.                        | `consul`                                   |

### Using custom HashiCorp Consul configuration files

In order to load your own configuration files, you will have to make them available to the container. You can do it doing the following:

- Mounting a volume with your custom configuration
- Adding custom configuration via environment variable.

By default, the configuration of HashiCorp Consul is written to `/opt/bitnami/consul/consul.json` file.

#### Configuring environment variables

Configuration can be added by passing the configuration in JSON format via the environment variable `CONSUL_LOCAL_CONFIG`. Then consul will write a `local.json` file in the HashiCorp Consul configuration directory. HashiCorp Consul will load all files within the configuration directory in alphabetical order, so ones with starting with higher letters will prevail.

#### Mounting a volume

Check the [Persisting your data](# Persisting your application) section to add custom volumes to the HashiCorp Consul container

### Configuring the Gossip encryption key

Specifies the secret key to use for encryption of HashiCorp Consul network traffic. This key must be 16-bytes that are Base64-encoded. The easiest way to create an encryption key is to use `consul keygen`

```console
docker run --name consul bitnami/consul:latest consul keygen
```

This command will generate a keygen, that you can add to your Dockerfile, docker-compose or pass it via command line:

```console
docker run -e CONSUL_GOSSIP_ENCRYPTION_KEY=YOUR_GENERATED_KEY --name consul bitnami/consul:latest
```

### FIPS configuration in Bitnami Secure Images

The Bitnami HashiCorp Consul Docker image from the [Bitnami Secure Images](https://go-vmware.broadcom.com/contact-us) catalog includes extra features and settings to configure the container with FIPS capabilities. You can configure the next environment variables:

- `OPENSSL_FIPS`: whether OpenSSL runs in FIPS mode or not. `yes` (default), `no`.
- `GODEBUG`: controls Go FIPS mode. Use `fips140=only` (restricted), `fips140=on` (relaxed), or `fips140=off` (disabled).

## Logging

The Bitnami HashiCorp Consul Docker image sends the container logs to the `stdout`. You can configure the containers [logging driver](https://docs.docker.com/engine/admin/logging/overview/) using the `--log-driver` option if you wish to consume the container logs differently. In the default configuration docker uses the `json-file` driver.

## Notable Changes

### Debian 1.6.1-r6 and Oracle 1.6.1-r7

Decrease the size of the container. The configuration logic is now based on Bash scripts in the `rootfs/` folder.
Also, some env var changes have been performed maintaining backward compatibility through aliases:

| New value                   | Old value            |
|-----------------------------|----------------------|
| `CONSUL_ENABLE_UI`          | `CONSUL_UI`          |
| `CONSUL_AGENT_MODE`         | `CONSUL_SERVER_MODE` |
| `CONSUL_RETRY_JOIN_ADDRESS` | `CONSUL_RETRY_JOIN`  |

### 1.4.0-r16

- The Consul container has been migrated to a non-root user approach. Previously the container ran as the `root` user and the Consul daemon was started as the `consul` user. From now on, both the container and the Consul daemon run as user `1001`. As a consequence, the data directory must be writable by that user. You can revert this behavior by changing `USER 1001` to `USER root` in the Dockerfile.

## License

Copyright &copy; 2026 Broadcom. The term "Broadcom" refers to Broadcom Inc. and/or its subsidiaries.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

<http://www.apache.org/licenses/LICENSE-2.0>

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
