decentral1se
9378db1979
We use a custom resolver now instead of relying on the baked-in Golang resolver which has issues. We use a friendly librehoster DNS resolver and not Google because fuck that.
79 lines
1.8 KiB
Go
79 lines
1.8 KiB
Go
package server
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import (
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"context"
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"errors"
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"fmt"
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"net"
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"time"
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"coopcloud.tech/abra/cli/internal"
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"coopcloud.tech/abra/client"
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"github.com/docker/docker/api/types"
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"github.com/docker/docker/api/types/swarm"
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"github.com/sirupsen/logrus"
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"github.com/urfave/cli/v2"
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)
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var serverInitCommand = &cli.Command{
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Name: "init",
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Usage: "Initialise server for deploying apps",
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HideHelp: true,
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ArgsUsage: "<host>",
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Description: `
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Initialise swarm mode on the target <host>.
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This initialisation explicitly chooses the "single host swarm" mode which uses
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the default IPv4 address as the advertising address. This can be re-configured
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later for more advanced use cases.
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`,
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Action: func(c *cli.Context) error {
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host := c.Args().First()
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if host == "" {
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internal.ShowSubcommandHelpAndError(c, errors.New("no host provided"))
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}
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cl, err := client.NewClientWithContext(host)
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if err != nil {
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return err
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}
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resolver := &net.Resolver{
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PreferGo: false,
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Dial: func(ctx context.Context, network, address string) (net.Conn, error) {
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d := net.Dialer{
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Timeout: time.Millisecond * time.Duration(10000),
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}
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// comrade librehosters DNS resolver https://snopyta.org/service/dns/
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return d.DialContext(ctx, "udp", "95.216.24.230:53")
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},
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}
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ctx := context.Background()
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ips, err := resolver.LookupIPAddr(ctx, host)
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if err != nil {
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logrus.Fatal(err)
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}
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if len(ips) == 0 {
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return fmt.Errorf("unable to retrieve ipv4 address for %s", host)
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}
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ipv4 := ips[0].IP.To4().String()
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initReq := swarm.InitRequest{
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ListenAddr: "0.0.0.0:2377",
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AdvertiseAddr: ipv4,
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}
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if _, err := cl.SwarmInit(ctx, initReq); err != nil {
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return err
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}
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netOpts := types.NetworkCreate{Driver: "overlay", Scope: "swarm"}
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if _, err := cl.NetworkCreate(ctx, "proxy", netOpts); err != nil {
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return err
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}
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return nil
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},
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}
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