// ping sends icmp packets from machine a to b using the ping tool.
func ping(a, b platform.Machine, ifname string) error {
srcip, err := mach2bip(a, ifname)
if err != nil {
return fmt.Errorf("failed to get docker bridge ip: %v", err)
}
dstip, err := mach2bip(b, ifname)
if err != nil {
return fmt.Errorf("failed to get docker bridge ip: %v", err)
}
// ensure the docker bridges have the right network
_, ipnet, _ := net.ParseCIDR("10.254.0.0/16")
if !ipnet.Contains(net.ParseIP(srcip)) || !ipnet.Contains(net.ParseIP(dstip)) {
return fmt.Errorf("bridge ips (%s %s) not in flannel network (%s)", srcip, dstip, ipnet)
}
plog.Infof("ping from %s(%s) to %s(%s)", a.ID(), srcip, b.ID(), dstip)
cmd := fmt.Sprintf("ping -c 10 -I %s %s", srcip, dstip)
out, err := a.SSH(cmd)
if err != nil {
return fmt.Errorf("ping from %s to %s failed: %s: %v", a.ID(), b.ID(), out, err)
}
return nil
}
