topo.sample.yml

topology:

  # Define build environments
  # Syntax inspired from docker-compose format
  envs:
    debian12:
      context: envs/debian12

    alpine318:
      context: .
      containerfile: alpine318.cf
     
  # Automatically build node's configuration based on attributes specified in this file
  templates:
    bird.tmpl: 
      path: configs/${node}.bird.cfg
      builder: alpine318
        
  # Automatically build specified binaries
  binaries:
    bird:
      builder: builders/bird.cf
      env: debian12

  default:
    node:
                              
      binds:
        - scripts/my_script.sh:./
        - configs/${node}.bird.cfg:./
        
      sysctls:
        net.ipv6.conf.all.forwarding: 1
      
      exec:
        - ./bird -s ./${node}.bird.cfg &
        
    links:
      attributes:
        latency: 5
        forward_metric: 1
        reverse_metric: 1

# Load graph from existing file
#  GML is standard and encodes coordinates, nice for visualization
graph:
  path: topo.gml
  format: gml

# Either encode full graph here, or override/extend node/link specific attributes 
# priority in case of clash: graph file < default < nodes/links section 
nodes:
  r2:
    binds:
      - configs/${node}.gobgp.cfg:./
    exec:
      - ./gobgp -f ${node}.gobgp.cfg &

links:
  - head: r0
    tail: r1
    attributes:
      latency: 10