Thales Maciel
b7f6d1fe1b
Banger was already serving VM records on 127.0.0.1:42069, but hosts using systemd-resolved were not routing .vm queries there. That made direct lookups against the local server work while normal host resolution and commands like opencode attach <vm>.vm:4096 failed.\n\nSync resolvectl dns/domain/default-route settings onto the banger bridge when the daemon opens and whenever VM DNS records are published, and revert that bridge-scoped configuration on daemon shutdown. This uses sudo resolvectl because unprivileged resolved reconfiguration on this host requires interactive authentication.\n\nValidation: GOCACHE=/tmp/banger-gocache go test ./..., make build, daemon restart, resolvectl dns/domain br-fc, resolvectl query vrum.vm, and curl http://vrum.vm:4096.
75 lines
2.1 KiB
Go
75 lines
2.1 KiB
Go
package daemon
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import (
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"context"
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"testing"
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"banger/internal/model"
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"banger/internal/vmdns"
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)
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func TestSyncVMDNSResolverRoutingConfiguresResolved(t *testing.T) {
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origLookup := lookupExecutableFunc
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origAddr := vmDNSAddrFunc
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t.Cleanup(func() {
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lookupExecutableFunc = origLookup
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vmDNSAddrFunc = origAddr
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})
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lookupExecutableFunc = func(name string) (string, error) {
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if name == "resolvectl" {
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return "/usr/bin/resolvectl", nil
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}
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return "", nil
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}
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vmDNSAddrFunc = func(*vmdns.Server) string { return "127.0.0.1:42069" }
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runner := &scriptedRunner{
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t: t,
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steps: []runnerStep{
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{call: runnerCall{name: "ip", args: []string{"link", "show", model.DefaultBridgeName}}, out: []byte("1: br-fc\n")},
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sudoStep("", nil, "resolvectl", "dns", model.DefaultBridgeName, "127.0.0.1:42069"),
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sudoStep("", nil, "resolvectl", "domain", model.DefaultBridgeName, vmResolverRouteDomain),
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sudoStep("", nil, "resolvectl", "default-route", model.DefaultBridgeName, "no"),
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},
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}
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d := &Daemon{
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runner: runner,
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config: model.DaemonConfig{BridgeName: model.DefaultBridgeName},
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vmDNS: new(vmdns.Server),
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}
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if err := d.syncVMDNSResolverRouting(context.Background()); err != nil {
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t.Fatalf("syncVMDNSResolverRouting: %v", err)
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}
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runner.assertExhausted()
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}
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func TestClearVMDNSResolverRoutingRevertsBridgeConfig(t *testing.T) {
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origLookup := lookupExecutableFunc
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t.Cleanup(func() {
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lookupExecutableFunc = origLookup
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})
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lookupExecutableFunc = func(name string) (string, error) {
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if name == "resolvectl" {
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return "/usr/bin/resolvectl", nil
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}
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return "", nil
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}
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runner := &scriptedRunner{
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t: t,
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steps: []runnerStep{
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{call: runnerCall{name: "ip", args: []string{"link", "show", model.DefaultBridgeName}}, out: []byte("1: br-fc\n")},
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sudoStep("", nil, "resolvectl", "revert", model.DefaultBridgeName),
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},
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}
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d := &Daemon{
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runner: runner,
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config: model.DaemonConfig{BridgeName: model.DefaultBridgeName},
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}
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if err := d.clearVMDNSResolverRouting(context.Background()); err != nil {
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t.Fatalf("clearVMDNSResolverRouting: %v", err)
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}
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runner.assertExhausted()
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}
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