DCOS Installation Troubleshooting

Nodes unable to download dcos_install.sh from bootstrap node

• Check docker port mapping is as expected
  • -p {externally visible port}:{Container port - should be 80}

• Check open ports visible to node:

  • nmap -v {bootstrap url}...be on the lookout for something like:

    run nmap -v {node url} 
    PORT     STATE    SERVICE
    22/tcp   open     ssh
    53/tcp   open     domain
    80/tcp   open     http
    443/tcp  open     https
    8080/tcp filtered http-proxy
    MAC Address: C0:3F:D5:68:61:5A (Unknown)
    

    The filtered http-proxy is an indicator of a network configuration problem

• Check the value of 'net.ipv4.ip_forward' on the bootstrap node.. The value should be 1.

  • If it is not 1 then change the value and restart networking.