44 Matching Annotations
  1. Mar 2019
    1. Usando Traefik para automatizar o proxy reverso de seus containers docker

      Ainda que esse não seja um assunto cobrado diretamente na prova, essas são ferramentas que devem fazer parte do cinto de utilidades de um bom DevOps. E busca por "container" nos nossos tópicos, nesse link, que tu vais descobrir a importância de conhecer bem sobre o assunto.

    2. Pipeline de CI/CD no Kubernetes usando Jenkins e Spinnaker

      Uau! Muitos assuntos da prova LPI DevOps são explorados nessa palestra. Fica de olho no tópico: 702 Container Management.

  2. Jan 2019
    1. this is in /srv/www/ on the host.

      This site actually gives somewhat clear instructions about which directories from which to run the commands. I think where I went wrong befire was using various directories that in the end did not match the actual installations.

  3. Dec 2018
  4. Jun 2018
  5. May 2018
    1. You can pull the image on a computer that have access to the internet.

      sudo docker pull ubuntu Then you can save this image to a file

      sudo docker save -o ubuntu_image.docker ubuntu Transfer the file on the offline computer (USB/CD/whatever) and load the image from the file:

      sudo docker load ubuntu_image.docker

  6. Apr 2018
  7. Dec 2017
  8. Nov 2017
  9. domino.research.ibm.com domino.research.ibm.com
  10. Sep 2017
    1. NixOS is a Linux distribution with a unique approach to package and configuration management.

      This is another approach to systems management and software as a services. I don't really understand in detail the difference between NixOS and docker, but googling NixOS vs Docker shows that its a topic that is ripe for a bunfight.

    1. Singularity containers can be used to package entire scientific workflows, software and libraries, and even data.

      Very interesting, basically Singularity allows containers to run in HPC environments, so that code running in the container can take advantage of the HPC tools, like massive scale and message passing, while at the same time keeping the stuff in the container safer.

    1. Note: When mapping ports in the HOST:CONTAINER format, you may experience erroneous results when using a container port lower than 60, because YAML will parse numbers in the format xx:yy as sexagesimal (base 60). For this reason, we recommend always explicitly specifying your port mappings as strings.

      Cool feature

  11. Aug 2017
  12. Jun 2017
  13. Mar 2017
    1. Prophet : Facebook에서 오픈 소스로 공개한 시계열 데이터의 예측 도구로 R과 Python으로 작성되었다.

      python statics opensource, also can use R

    2. Docker Swarm을 이용한 쉽고 빠른 분산 서버 관리 : Docker Swarm으로 서버 오케스트레이션 하는 방법을 설명한 글이다. 현재 사용 가능한 오케스트레이션 도구들의 장단점도 정리되어 있고 Swarm이 제공하는 기능을 설명한 후 실제로 따라 해 보면서 테스트해볼 수 있게 글이 작성되어 있어서 오케스트레이션 도구를 검토하고 있다면 찬찬히 읽어봐야 할 글이다. 얼마 전에 Docker Swarm을 보고 간단하면서 기능이 강력해서 꽤 좋은 인상을 받았는데 정리된 글이 나와서 반갑다.(한국어)
  14. Jan 2017
    1. Cannot connect to the Docker daemon

      For Linux/Unix people, it may very well be that you did not add your username to the 'docker' group and as a consequence you cannot communicate with the docker daemon. I had just experienced this (while running Linux Mint 18.1, but the symptoms ought to be similar for Debian/Ubuntu as well).

      To fix it, I ran:

      sudo usermod -aG docker $(whoami)

      Log out and log back in. This ensures your user is running with the correct permissions.

      This will ensure that you do not need to sudo every time, when you interact with docker.

      There are instructions in the below link for Unix (MacOS) users as well.

      Source: http://stackoverflow.com/a/33596140

  15. Dec 2016
  16. Jun 2016
    1. Docker is a type of virtual machine

      How does it compare to the packages installed directly? Could be useful for development, but maybe not practical for HPC applications. Maybe just create a cd iso with all the correct programs and their dependencies.

  17. Apr 2016
    1. In its default configuration, the CJRS web service (either deployed as an executable jar, or a war file in a servlet container) is configured to use the SLURM JobExecutionService, and directly invokes ‘srun’, ‘sbatch’, and ‘salloc’ commands that are available on the host it is running on.A natural consequence of this is that SLURM jobs are submitted using the same user ID as owner of the CJRS web service process. For the purposes of training and demonstration, it is recommended to deploy the application so that it runs as a single, unprivileged user created specifically for the purpose of training. In theory, however, anybody who obtains the executable jar file may run it on a machine they have access to, bound to some random high port exclusive to that user, allowing it to launch SLURM jobs on their behalf via the REST API.

      This will likely not be portable to Docker due to security issues; two separate users will be needed: https://docs.docker.com/engine/security/security/#docker-daemon-attack-surface

  18. Dec 2015
  19. May 2015
  20. Mar 2015
    1. Excellent guide for creating a fresh CoreOS image for AWS using Ext4 and OverlayFS.

      This is the future for CoreOS and should be more stable than btrfs.