44 lines
1.1 KiB
Go
44 lines
1.1 KiB
Go
package iptables
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import (
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"fmt"
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"os/exec"
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"git.g3e.fr/syonad/two/internal/metadata"
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)
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func addRule(args ...string) error {
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return exec.Command("iptables", append([]string{"-t", "nat", "-A"}, args...)...).Run()
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}
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func deleteRule(args ...string) error {
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return exec.Command("iptables", append([]string{"-t", "nat", "-D"}, args...)...).Run()
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}
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func AddMetadataRedirect(vmIP, gatewayIP, metadataPort string) error {
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if err := addRule("PREROUTING",
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"-s", vmIP+"/32",
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"-d", metadata.ServiceIP+"/32",
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"-p", "tcp", "-m", "tcp",
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"--dport", "80",
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"-j", "DNAT",
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"--to-destination", gatewayIP+":"+metadataPort,
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); err != nil {
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return fmt.Errorf("iptables metadata redirect: %w", err)
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}
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return nil
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}
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func DeleteMetadataRedirect(vmIP, gatewayIP, metadataPort string) error {
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if err := deleteRule("PREROUTING",
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"-s", vmIP+"/32",
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"-d", metadata.ServiceIP+"/32",
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"-p", "tcp", "-m", "tcp",
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"--dport", "80",
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"-j", "DNAT",
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"--to-destination", gatewayIP+":"+metadataPort,
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); err != nil {
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return fmt.Errorf("iptables delete metadata redirect: %w", err)
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}
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return nil
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}
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