Create Python Flask Docker Container […]
Create Python Flask Docker Container
Create a folder and change to the folder
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mkdir python-flask cd python-flask |
Create file
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vi Dockerfile |
Add following content
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FROM python:2.7-slim WORKDIR /app COPY . /app RUN pip install -r requirments.txt EXPOSE 8080 CMD ["python", "app.py"] |
Create file requirements.txt, add “Flask” to it.
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echo "Flask" > requirments.txt |
Now lets create our Python Flask Application
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vi app.py |
Add following content
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from flask import Flask import os import socket app = Flask(__name__) @app.route("/") def hello(): return "<h1>Ok, World</h1>" if __name__ == "__main__": app.run(host="0.0.0.0", port=8080) |
To test Flask application locally, install Flask using pip
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sudo pip install Flask |
Now run the application using
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python app.py |
Now you will […]
Create Kubernetes cluser using gcloud
Login to gcloud with
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gcloud auth login |
Set default region
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gcloud config set compute/zone us-central1-a |
To create a cluser, run
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gcloud container clusters create CLUSTER-NAME |
To create a cluster with 2 nodes, run
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gcloud container clusters create CLUSTER-NAME --num-nodes 2 |
To specify compute engine type during cluster creation, run
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gcloud container clusters create CLUSTER-NAME --num-nodes 2 --machine-type n1-standard-2 |
You can also specify scopes, this allow you to give the cluster permission to access other google cloud resources. For example […]
Docker container start on boot
To set a docker container to start on system reboot, run
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docker update --restart=unless-stopped CONTAINER_ID |
Replace CONTAINER_ID with actual ID of your container. […]
Docker Nginx Proxy
Docker Nginx Proxy allow you to run multiple docker containers on same server behind nginx proxy. This is done using https://github.com/jwilder/nginx-proxy To do this, you need a server with port 80 and 443 unused. To setup nginx proxy, run following
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cd /root/ git clone https://github.com/evertramos/docker-compose-letsencrypt-nginx-proxy-companion.git cd docker-compose-letsencrypt-nginx-proxy-companion cp .env.sample .env ./start.sh |
This will start nginx proxy. You can modify .env file if you want. Starting […]
Docker Build
Build a docker container with Apache docker build command is used to create a docker image from Dockerfile. To create an image, first lets create a working directory and change to the directory.
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mkdir ~/my-docker-image cd ~/my-docker-image |
Create a file with name Dockerfile
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vi Dockerfile |
Put following content in it
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FROM ubuntu:18.04 RUN apt update && apt upgrade -y CMD ["/bin/bash"] |
Now build the docker image with
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docker build -t my-ubuntu . |
This […]
Installing Docker on Ubuntu 16.04
To install docker on Ubuntu 16.04, run
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wget -qO- https://get.docker.com/ | sh |
To run docker commands as your user, run
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usermod -aG docker your-user |
Docker […]
docker search
docker search command allows you to search for images in docker hub. Example
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root@ok:~# docker search nginx NAME DESCRIPTION STARS OFFICIAL AUTOMATED nginx Official build of Nginx. 8043 [OK] jwilder/nginx-proxy Automated Nginx reverse proxy for docker con… 1284 [OK] richarvey/nginx-php-fpm Container running Nginx + PHP-FPM capable of… 526 [OK] jrcs/letsencrypt-nginx-proxy-companion LetsEncrypt container to use with nginx as p… 320 [OK] kong Open-source Microservice & API Management la… 160 [OK] webdevops/php-nginx Nginx with PHP-FPM 97 [OK] kitematic/hello-world-nginx A light-weight nginx container that demonstr… 95 bitnami/nginx Bitnami nginx Docker Image 44 [OK] linuxserver/nginx An Nginx container, brought to you by LinuxS… 33 1and1internet/ubuntu-16-nginx-php-phpmyadmin-mysql-5 ubuntu-16-nginx-php-phpmyadmin-mysql-5 26 [OK] tobi312/rpi-nginx NGINX on Raspberry Pi / armhf 18 [OK] wodby/drupal-nginx Nginx for Drupal container image 9 [OK] webdevops/nginx Nginx container 8 [OK] blacklabelops/nginx Dockerized Nginx Reverse Proxy Server. 8 [OK] nginxdemos/nginx-ingress NGINX Ingress Controller for Kubernetes 8 centos/nginx-18-centos7 Platform for running nginx 1.8 or building n… 6 nginxdemos/hello NGINX webserver that serves a simple page co… 4 [OK] 1science/nginx Nginx Docker images that include Consul Temp… 4 [OK] behance/docker-nginx Provides base OS, patches and stable nginx f… 2 [OK] pebbletech/nginx-proxy nginx-proxy sets up a container running ngin… 2 [OK] toccoag/openshift-nginx Nginx reverse proxy for Nice running on same… 1 [OK] travix/nginx NGinx reverse proxy 1 [OK] mailu/nginx Mailu nginx frontend 0 [OK] goodguide/nginx-application-proxy No-configuration Nginx reverse proxy for a R… 0 [OK] ppc64le/nginx Official build of Nginx. 0 root@ok:~# |
To see results with 4 or more stars, use
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docker search --filter stars=4 |
docker […]
Docker Login
docker login command allows you to login to docker.com. You need to login to docker before you can upload your own images to docker hub. This is also needed if you need to pull down a private image.
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root@ok:~# docker login Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one. Username: serverok Password: Login Succeeded root@ok:~# |
if you need to login to a different docker registery, for example your company docker registery, […]
portainer – Web based UI for Docker
Portainer is a web based UI for managing docker. https://portainer.io/ You can run it with command
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docker volume create portainer_data docker run -d -p 8000:8000 -p 9000:9000 --name=portainer --restart=always -v /var/run/docker.sock:/var/run/docker.sock -v portainer_data:/data portainer/portainer-ce |
Now login to portainer with url http://YOUR_SERVER_IP:9000 docker […]