Docker Containers
@ladislavGazo
gazo@seges.sk
Deployment evolution
- physical server
- virtualization
- chroot/jail
- containers
Physical Server
Pros:
- bare hardware usage
- no overhead
- straightforward
Cons:
- does not scale easily
- costly
- no effective utilisation
- mixture of applications on one server
Virtualization
Pros:
- utilization of underlying HW
- horizontal scaling
- transparent image migration
- cross-platform
- cloud and DevOps evolution
Cons:
- virtual machine overhead
- efficiency of utilization
- startup time
Containers
Pros:
- microservices concept
- minimal container overhead
- quick startup
- transparent and consistent deployment
- trend
Cons:
- young project (but heavy involvement of big companies)
- unsolved parts yet (service discovery, security,...)
- windows
Docker
Demo Environment
server:
.....
user:
......
pass:
......
Docker provisioning
- Dockerfile
- custom scripts
- DevOps tools
- chef-container
Docker in Seges
- Voipac Wiki prototype
- discovered complexity of preparing Chef-aware environment with proper service startup
- first boot container initialization
- Synapso ACC prototype
- transforming existing app to "microservice" ecosystem
- complexity of service discovery
- volumes and linking containers
- ambassador pattern
Docker in Development
Example:
Principle:
-
application running in docker
- exposed ports
- volume linked to the host
- IDE works on top of the volume
Benefit
same environment in DEV, ACC & PROD
Never been in Moria?
docker run --rm -v /usr/local/bin:/target jpetazzo/nsenterPedo Mellon a Minno
docker-enter my_awesome_container ls -laPlay time
Questions?
@ladislavGazo
gazo@seges.sk
Thank YOu... for...
ATTENTION
Docker Containers light introduction
By lgazo
Docker Containers light introduction
Light introduction to the world of Docker
