Beiträge zum Thema âdockerâ
01. Oktober 2016
Docker image for Wallabag v2
Sometimes I want to save articles that I want to read for later, because I donât have the time to read right now. There are a couple of free online services that you can use, like Instapaper or Pocket. The services all work the same:
you give them a link to a webpage you want to read later they scrape the page and store the text when you got time, you open the service in your browser or a mobile app and read the article you can save, delete, star the article But with my ongoing quest to avoid services and host my own versions of them, I began using my own installation of Wallabag a couple weeks ago.
13. September 2016
Using haproxy to load balance tomcat instances with Docker
Today I wanted to set up my local environment with a load balancer for my tomcats. To get started, I took a look at the dockercloud-haproxy image and the provided example configuration for docker-compose:
version: '2' services: web: image: dockercloud/hello-world lb: image: dockercloud/haproxy links: - web volumes: - /var/run/docker.sock:/var/run/docker.sock ports: - 80:80 You can run this example right away and open http://localhost to see the load balance hello-world page. To scale the web service, use docker-compose scale web=2 and reload the page a couple of times.
28. Juli 2016
Dockerfile to build qdirstat
Today I wanted to check how much diskspace I wasted in my home directory. On windows Iâd use WinDirStat and on linux there is the alternative qdirstat. Unfortunately there is no pre-build binary for my distribution, so I decided to build from source. But I donât want litter my system with Qt dependencies, so I decided to build it in a docker container. Hereâs my Dockerfile:
FROM ubuntu:14.04 RUN apt-get update -y && apt-get install -y build-essential qtbase5-dev zlib1g-dev qttools5-dev-tools qt5-default gdb git VOLUME ["/usr/target/"] RUN cd /usr/src && git clone https://github.
09. Februar 2016
Running a local Docker registry
When youâre using Docker extensively, you sometimes need to run your own registry in order to push images around in your local network - or even on your local machine. For that you need a registry where you can push and pull images. With Docker itself, itâs easy to set it up. Here is a small docker-compose.yml which runs a registry and a simple frontend:
registry: image: registry:2 volumes: - data:/var/lib/registry ports: - 5000:5000 frontend: image: konradkleine/docker-registry-frontend:v2 links: - registry ports: - 8080:80 environment: - ENV_DOCKER_REGISTRY_HOST=registry - ENV_DOCKER_REGISTRY_PORT=5000 The registry is persisting its data into the directory data, so nothing is lost if you throw away and recreate the container.
07. Februar 2016
Minimal Docker image for DokuWiki
Yesterday I upgraded my Docker setup from v1.5 to v.10. I had to do a full apt-get dist-upgrade as well to bring my system up to Debian Jessie. On the way I discovered that my backup script wasnât backing up anything from my personal wiki running with DokuWiki. Another case of Schroedingers Backup: The backup is only there, if it can be successfully restored. âš Anyway, I had only a few snippets from my daily development work and some links to software I tend to use on the wiki, so not that much of a loss.
28. Januar 2016
Updating my ELK stack with GELF appender
A couple of days ago I wrote about setting up an ELK stack with docker-compose. I did some small changes to the set up, so I thought itâs worth an update.
First change is in the docker-compose.yml to enable logstashs gelf input, move the Log4j socket to port 12202 and add an UDP port forwarding for docker on port 12201:
elasticsearch: image: elasticsearch ports: - 9200:9200 logstash: image: logstash:latest links: - elasticsearch:elasticsearch ports: - 12201:12201/udp - 12202:12202 command: logstash agent -e 'input { gelf { port => "12201" } log4j { mode => "server" port => "12202"} } output { elasticsearch { hosts => ["elasticsearch"] } }' kibana: image: kibana links: - elasticsearch:elasticsearch ports: - 5601:5601 environment: - ELASTICSEARCH_URL=http://elasticsearch:9200 This way, logstash will listen to ports 12201 with the gelf input and port 12202 with the Log4j socket input.
26. Januar 2016
Building an ELK stack with docker-compose
Because I have a hard time searching logfiles during development (I like to run everything on DEBUG), I decided to build myself an ELK stack (elasticsearch, logstash and kibana) to throw all my logs into and have a nice UI to search for a special log message.
Fortunately there are official docker images for these tools:
https://hub.docker.com/_/elasticsearch/ https://hub.docker.com/_/logstash/ https://hub.docker.com/_/kibana/ So, everything is easily available, I just needed to figure out how to glue it together.
15. November 2014
Docker FTW!
The past few days I was playing around with Docker to set up a small testbed with ActiveMQ, StatsD and Grafana. I want to test how to collect metrics from Apache Camel routes and display them via a webfrontend in nice graphcs. Thatâs exactly what Grafana is doing best.
I started with running a few ActiveMQ instances via Docker. Then I created a simple Camel application using camel-archetype-activemq and modified it to write a random amount of messages into my already running ActiveMQ instances using the failover Transport.
02. Oktober 2014
Running Minecraft in a Docker container
If you ever want to run a minecraft server, but you donât want to add all the Java and minecraft files directly to your servers filesystem, you can use the following Dockerfile:
FROM google/debian:wheezy RUN apt-get -y update RUN apt-get -y install openjdk-7-jre-headless wget RUN wget https://s3.amazonaws.com/Minecraft.Download/versions/1.8/minecraft_server.1.8.jar EXPOSE 25565 RUN echo eula=true > eula.txt CMD ["java", "-jar", "minecraft_server.1.8.jar"] You can then build a Docker container with the following command:
sudo docker build .