What is Prometheus?
Prometheus, is a systems and service monitoring system. It collects metrics from configured targets at given intervals, evaluates rule expressions, displays the results, and can trigger alerts if some condition is observed to be true.
Prometheus' main distinguishing features as compared to other monitoring systems are:
a multi-dimensional data model (timeseries defined by metric name and set of key/value dimensions) a flexible query language to leverage this dimensionality no dependency on distributed storage; single server nodes are autonomous timeseries collection happens via a pull model over HTTP pushing timeseries is supported via an intermediary gateway targets are discovered via service discovery or static configuration multiple modes of graphing and dashboarding support support for hierarchical and horizontal federation
TL;DR
$ docker run --name prometheus bitnami/prometheus:latestWhy use Bitnami Images?
- Bitnami closely tracks upstream source changes and promptly publishes new versions of this image using our automated systems.
- With Bitnami images the latest bug fixes and features are available as soon as possible.
- Bitnami containers, virtual machines and cloud images use the same components and configuration approach - making it easy to switch between formats based on your project needs.
- All our images are based on minideb a minimalist Debian based container image which gives you a small base container image and the familiarity of a leading Linux distribution.
- All Bitnami images available in Docker Hub are signed with Docker Content Trust (DCT). You can use
DOCKER_CONTENT_TRUST=1to verify the integrity of the images. - Bitnami container images are released daily with the latest distribution packages available.
This CVE scan report contains a security report with all open CVEs. To get the list of actionable security issues, find the "latest" tag, click the vulnerability report link under the corresponding "Security scan" field and then select the "Only show fixable" filter on the next page.
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.
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.
Subscribe to project updates by watching the bitnami/prometheus GitHub repo.
Get this image
The recommended way to get the Bitnami Prometheus Docker Image is to pull the prebuilt image from the Docker Hub Registry.
$ docker pull bitnami/prometheus:latestTo use a specific version, you can pull a versioned tag. You can view the list of available versions in the Docker Hub Registry.
$ docker pull bitnami/prometheus:[TAG]If you wish, you can also build the image yourself.
$ docker build -t bitnami/prometheus:latest 'https://github.com/bitnami/bitnami-docker-prometheus.git#master:2/debian-10'Persisting your database
If you remove the container all your data 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 add persistance even after the container is removed.
For persistence, mount a directory at the /opt/bitnami/prometheus/data path. If the mounted directory is empty, it will be initialized on the first run.
$ docker run --name prometheus \
-v /path/to/prometheus-persistence:/opt/bitnami/prometheus/data \
bitnami/prometheus:latestNOTE: 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, 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.
Using the Command Line
Step 1: Create a network
$ docker network create prometheus-network --driver bridgeStep 2: Launch the Blacbox_exporter container within your network
Use the --network <NETWORK> argument to the docker run command to attach the container to the prometheus-network network.
$ docker run --name prometheus-node1 --network prometheus-network bitnami/prometheus:latestStep 3: Run other containers
We can launch other containers using the same flag (--network NETWORK) in the docker run command. If you also set a name to your container, you will be able to use it as hostname in your network.
Configuration
Prometheus is configured via command-line flags and a configuration file. While the command-line flags configure immutable system parameters (such as storage locations, amount of data to keep on disk and in memory, listening address, etc.), the configuration file defines everything related to scraping jobs and their instances, as well as which rule files to load.
Prometheus can reload its configuration at runtime. If the new configuration is not well-formed, the changes will not be applied. A configuration reload is triggered by sending a SIGHUP to the Prometheus process or sending a HTTP POST request to the /-/reload endpoint (when the --web.enable-lifecycle flag is enabled). This will also reload any configured rule files.
Command-Line Flags
You can add new flags to the ones already in use by default, which are passed to Prometheus through the CMD instruction in the Dockerfile.
To view all available command-line flags, run docker run bitnami/prometheus:latest -h.
Configuration file
You can overwrite the default configuration file with your custom prometheus.yml. Create a custom conf file and mount it at /opt/bitnami/prometheus/conf/prometheus.yml like so:
$ docker run --name prometheus \
-v path/to/prometheus.yml:/opt/bitnami/prometheus/conf/prometheus.yml \
bitnami/prometheus:latestLogging
The Bitnami Prometheus Docker image sends the container logs to the stdout. To view the logs:
$ docker logs prometheusYou can configure the containers logging driver using the --log-driver option if you wish to consume the container logs differently. In the default configuration docker uses the json-file driver.
Maintenance
Upgrade this image
Bitnami provides up-to-date versions of prometheus, including security patches, soon after they are made upstream. We recommend that you follow these steps to upgrade your container.
Step 1: Get the updated image
$ docker pull bitnami/prometheus:latestStep 2: Stop and backup the currently running container
Stop the currently running container using the command
$ docker stop prometheusNext, take a snapshot of the persistent volume /path/to/prometheus-persistence using:
$ rsync -a /path/to/prometheus-persistence /path/to/prometheus-persistence.bkp.$(date +%Y%m%d-%H.%M.%S)You can use this snapshot to restore the database state should the upgrade fail.
Step 3: Remove the currently running container
$ docker rm -v prometheusStep 4: Run the new image
Re-create your container from the new image, if necessary.
$ docker run --name prometheus bitnami/prometheus:latestContributing
We'd love for you to contribute to this container. You can request new features by creating an issue, or submit a pull request with your contribution.
Issues
If you encountered a problem running this container, you can file an issue. For us to provide better support, be sure to include the following information in your issue:
- Host OS and version
- Docker version (
docker version) - Output of
docker info - Version of this container
- The command you used to run the container, and any relevant output you saw (masking any sensitive information)
License
Copyright (c) 2021 Bitnami
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.
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