La cloud de Google: Kubernetes

Charla introductoria sobre Kubernetes que di en una Docker Meetup en Mendoza, Argentina

Transcript

1. La cloud de Google:
   Kubernetes
   Pablo Fredrikson - Lead SRE @ Invision
   @pablokbs
   

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2. Pablo Fredrikson
   @pablokbs
   ● Professional Nerd
   ● 12 años con Linux / Open Source
   ● Lead SRE @ Invision
   

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3. docker: básico
   FROM alpine:3.6
   ENV PYTHON_VERSION 3.6.3
   RUN set -ex \
   && apk add --no-cache --virtual .fetch-deps \
   gnupg \
   libressl \
   tar \
   xz \
   \
   && wget -O python.tar.xz
   "https://www.python.org/ftp/python/${PYTHON_VERSION}/Python-$PYTHON_VERSION.tar.xz"
   ...
   CMD ["python3"]
   

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4. docker: básico
   $ docker run -it pablokbs/python3 hello-world.py
   Hello world :)
   

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5. docker: complejo - nginx-proxy
   $ docker run -d -p 80:80 -v /var/run/docker.sock:/tmp/docker.sock:ro jwilder/nginx-proxy
   $ docker run -e VIRTUAL_HOST=foo.bar.com pablokbs/myweb
   

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6. docker: complejo - nginx-proxy
   interwebz
   nginx-proxy
   my_app
   VIRTUAL_HOST=
   foo.example.com
   my_other_app
   VIRTUAL_HOST=
   bar.example.com
   foo.example.com
   docker.d
   

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7. docker: complejo - nginx-proxy
   $ docker run -d -P 80:80 \
   -v /var/run/docker.sock:/tmp/docker.sock:ro \
   -v /root/docker/ssl/pablokbs.com/:/etc/nginx/certs/ \
   jwilder/nginx-proxy
   $ docker run -d -p 80:80 \
   -e VIRTUAL_HOST=www.pablokbs.com,pablokbs.com \
   -e DEBUG=false \
   -e ENVIRONMENT=production \
   -v /root/docker/web/mycode/:/var/www/pablokbs_code/ \
   pablokbs/myweb
   

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8. Solución! docker-compose
   $ cat docker-compose.yml
   nginx:
   image: jwilder/nginx-proxy
   ports:
   - "80:80"
   - "443:443"
   volumes:
   - /var/run/docker.sock:/tmp/docker.sock:ro
   - /root/docker/ssl/pablokbs.com/:/etc/nginx/certs/
   myweb:
   image: pablokbs/myweb
   expose:
   - "80"
   environment:
   - VIRTUAL_HOST=www.pablokbs.com,pablokbs.com
   - DEBUG=false
   - ENVIRONMENT=production
   

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9. Solución! docker-compose
   $ docker-compose up -d
   Creating docker_nginx_1 … done
   docker_web_1 is up-to-date
   $ docker-compose ps
   Name Command State Ports
   -------------------------------------------------------------------------------------------------------
   docker_nginx_1 /app/docker-entrypoint.sh Up 0.0.0.0:80 -> 80/tcp
   docker_web_1 /myapp.sh Up 80 ->80/tcp
   

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10. Solución! docker-compose
    + +
    

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11. Mascotas vs. Ganado
    Rambo Alberta, Lucrecia, Susana (?)
    

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12. Borg / Kubernetes
    https://landing.google.com/sre/book.html
    

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13. Kubernetes en 5 minutos
    Servicios de
    cluster de
    Kubernetes
    API
    worker
    K
    worker
    K
    worker
    K
    deployment
    pod1:
    - container1
    - container2
    replicas: 3
    pod2:
    - container3
    replicas: 2
    p1r1
    p2r1
    p1r2
    p1r3
    p2r2
    

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14. Kubernetes en 5 minutos
    Servicios de
    cluster de
    Kubernetes
    API
    worker
    K
    worker
    K
    worker
    K
    deployment
    pod1:
    - container1
    - container2
    replicas: 3
    pod2:
    - container3
    replicas: 2
    p1r1
    p2r1
    p1r2
    p1r3
    p2r2
    p1r2
    

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15. Demo
    

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16. ¿Preguntas?
    @pablokbs
    @InvisionApp
    

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