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ADd consul support , multiple monitors, config file

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This commit is contained in:
Mayuresh Gaitonde
2018-10-25 22:23:04 -07:00
parent e20f691de5
commit 6fafdbbd16
11 changed files with 441 additions and 85 deletions
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30
controller/system.go
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@@ -33,20 +33,38 @@ func localAddress(gw net.IP) (net.IP, error) {
}
func addLoopback(name string, addr *net.IPNet) error {
mask := fmt.Sprintf("%d.%d.%d.%d", addr.Mask[0], addr.Mask[1], addr.Mask[2], addr.Mask[3])
cmd := fmt.Sprintf("ifconfig lo:%s %s netmask %s up", name, addr.IP.String(), mask)
prefixLen, _ := addr.Mask.Size()
label := fmt.Sprintf("lo:%s", name)
// linux kernel limits labels to 15 chars
if len(label) > 15 {
label = label[:15]
}
cmd := fmt.Sprintf("ip address add %s/%d dev lo label %s", addr.IP.String(), prefixLen, label)
_, err := exec.Command("bash", "-c", cmd).Output()
if err != nil {
return fmt.Errorf("Failed to Add loopback command: %v", err)
return fmt.Errorf("Failed to Add loopback command: %s: %v", cmd, err)
}
return nil
}
func deleteLoopback(name string) error {
cmd := fmt.Sprintf("ifconfig lo:%s down", name)
func deleteLoopback(addr *net.IPNet) error {
prefixLen, _ := addr.Mask.Size()
cmd := fmt.Sprintf("ip address delete %s/%d dev lo", addr.IP.String(), prefixLen)
_, err := exec.Command("bash", "-c", cmd).Output()
if err != nil {
return fmt.Errorf("Failed to delete loopback command: %v", err)
return fmt.Errorf("Failed to delete loopback command: %s: %v", cmd, err)
}
return nil
}
func natRule(op string, vip, localAddr net.IP, port, protocol string) error {
cmd := fmt.Sprintf(
"iptables -t nat -%s PREROUTING -p %s -d %s --dport %s -j DNAT --to-destination %s:%s",
op, protocol, vip.String(), port, localAddr.String(), port,
)
_, err := exec.Command("bash", "-c", cmd).Output()
if err != nil {
return fmt.Errorf("Failed to %s nat rule: %s: %v", op, cmd, err)
}
return nil
}