Prometheus Docker Setup

This repository contains a Dockerfile to create a Docker image for Prometheus using an Ubuntu base image.

How Prometheus Monitoring works | Prometheus Architecture explained

URL:https://youtu.be/h4Sl21AKiDg?si=GjAxyuELKLsP1A_s

Dockerfile Explanation

The provided Dockerfile performs the following steps:

1. Base Image: Uses the official Ubuntu base image.
2. Maintainer: Sets a maintainer label.
3. Update and Install Packages: Updates the package list and installs necessary packages (wget, tar, gzip).
4. Prometheus Version: Sets the Prometheus version to be installed.
5. Create Directories: Creates directories for Prometheus configuration and data.
6. Download and Install Prometheus: Downloads Prometheus, extracts it, and moves the binaries and configuration files to the appropriate locations.
7. Expose Port: Exposes port 9090, which is used by Prometheus.
8. Entrypoint: Sets the entrypoint to run Prometheus with the specified configuration file and storage path.
9. Healthcheck: Adds a healthcheck to ensure Prometheus is running.

Building the Docker Image

To build the Docker image, follow these steps:

1. Clone the repository:

   sudo git clone https://github.com/Eliyaser/prometheus-docker-setup.git
   sudo chown -R $USER:$USER /opt/prometheus-docker-setup
   cd /opt

2. Build the Docker image:

   sudo docker image build -t my-prometheus-image:v2.46.0 -f prometheus-docker-setup/2.46.0/ubuntu-linux.dockerfile prometheus-docker-setup/2.46.0/context

Running the Docker Container

To run a container from the built image:

1. Run the container:

   sudo docker run -d -p 9090:9090 --name my-prometheus-container my-prometheus-image:v2.46.0

2. Verify that Prometheus is running by opening your browser and navigating to:

   http://192.168.101.5:9090
   

Stopping and Removing the Container, and Deleting the Image

To stop, remove the container, and delete the Docker image, follow these steps:

1. Stop the container:

   sudo docker stop my-prometheus-container

2. Remove the container:

   sudo docker rm my-prometheus-container

3. Delete the image:

   sudo docker rmi my-prometheus-image:v2.46.0

Verification

To verify that the container and image have been removed, you can list the existing containers and images:

• List all containers (including stopped ones):

  sudo docker ps -a

• List all images:

  sudo docker images
  

Dockerfile

Here is the Dockerfile used in this repository:

# Use the official Ubuntu base image
FROM ubuntu:22.04

# Set the maintainer label
LABEL maintainer="[email protected]"

# Install system packages.
RUN set -x \
  && apt update \
  && apt upgrade -y \
  && apt install -y wget vim net-tools gcc make tar git unzip sysstat tree netcat nmap logrotate cron

# Install Supervisor.
RUN set -x \
  && apt install -y supervisor

# Set the Prometheus version
ENV PROMETHEUS_VERSION=2.46.0

# Create a directory for Prometheus
RUN mkdir -p /etc/prometheus /var/lib/prometheus

# Download and install Prometheus
RUN cd /tmp && \
    wget https://github.com/prometheus/prometheus/releases/download/v${PROMETHEUS_VERSION}/prometheus-${PROMETHEUS_VERSION}.linux-amd64.tar.gz && \
    tar -xvf prometheus-${PROMETHEUS_VERSION}.linux-amd64.tar.gz && \
    cd prometheus-${PROMETHEUS_VERSION}.linux-amd64 && \
    mv prometheus /usr/local/bin/ && \
    mv promtool /usr/local/bin/ && \
    mv prometheus.yml /etc/prometheus/ && \
    mv consoles /etc/prometheus/ && \
    mv console_libraries /etc/prometheus/ && \
    rm -rf /tmp/prometheus-${PROMETHEUS_VERSION}.linux-amd64.tar.gz /tmp/prometheus-${PROMETHEUS_VERSION}.linux-amd64

# Expose Prometheus port
EXPOSE 9090

# Set the entrypoint
ENTRYPOINT ["/usr/local/bin/prometheus", "--config.file=/etc/prometheus/prometheus.yml", "--storage.tsdb.path=/var/lib/prometheus"]

# Add a healthcheck
HEALTHCHECK CMD wget --spider http://localhost:9090/ || exit 1