90 lines
2.2 KiB
Go
90 lines
2.2 KiB
Go
package daemon
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import (
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"context"
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"fmt"
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"isle/bootstrap"
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"isle/dnsmasq"
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"path/filepath"
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"sort"
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"code.betamike.com/micropelago/pmux/pmuxlib"
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"dev.mediocregopher.com/mediocre-go-lib.git/mlog"
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)
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func dnsmasqConfig(
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daemonConfig Config, hostBootstrap bootstrap.Bootstrap,
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) dnsmasq.ConfData {
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hostsSlice := make([]dnsmasq.ConfDataHost, 0, len(hostBootstrap.Hosts))
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for _, host := range hostBootstrap.Hosts {
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hostsSlice = append(hostsSlice, dnsmasq.ConfDataHost{
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Name: string(host.Name),
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IP: host.IP().String(),
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})
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}
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sort.Slice(hostsSlice, func(i, j int) bool {
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return hostsSlice[i].IP < hostsSlice[j].IP
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})
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return dnsmasq.ConfData{
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Resolvers: daemonConfig.DNS.Resolvers,
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Domain: hostBootstrap.NetworkCreationParams.Domain,
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IP: hostBootstrap.ThisHost().IP().String(),
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Hosts: hostsSlice,
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}
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}
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func dnsmasqWriteConfig(
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runtimeDirPath string,
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daemonConfig Config,
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hostBootstrap bootstrap.Bootstrap,
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) (
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string, error,
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) {
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var (
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confPath = filepath.Join(runtimeDirPath, "dnsmasq.conf")
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confData = dnsmasqConfig(daemonConfig, hostBootstrap)
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)
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if err := dnsmasq.WriteConfFile(confPath, confData); err != nil {
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return "", fmt.Errorf("writing dnsmasq.conf to %q: %w", confPath, err)
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}
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return confPath, nil
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}
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func dnsmasqPmuxProcConfig(
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logger *mlog.Logger,
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runtimeDirPath, binDirPath string,
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daemonConfig Config,
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hostBootstrap bootstrap.Bootstrap,
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) (
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pmuxlib.ProcessConfig, error,
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) {
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confPath, err := dnsmasqWriteConfig(
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runtimeDirPath, daemonConfig, hostBootstrap,
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)
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if err != nil {
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return pmuxlib.ProcessConfig{}, fmt.Errorf(
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"writing dnsmasq config: %w", err,
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)
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}
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return pmuxlib.ProcessConfig{
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Cmd: filepath.Join(binDirPath, "dnsmasq"),
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Args: []string{"-d", "-C", confPath},
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StartAfterFunc: func(ctx context.Context) error {
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// TODO consider a shared dnsmasq across all the daemon's networks.
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// This would have a few benefits:
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// - Less processes, less problems
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// - Less configuration for the user in the case of more than one
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// network.
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// - Can listen on 127.0.0.x:53, rather than on the nebula address.
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// This allows DNS to come up before nebula, which is helpful when
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// nebula depends on DNS.
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return waitForNebula(ctx, logger, hostBootstrap)
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},
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}, nil
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}
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