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config_show.go
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/
config_show.go
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package postgres
import (
"context"
"fmt"
"strconv"
"strings"
"github.com/pkg/errors"
"github.com/spf13/cobra"
"github.com/superfly/flyctl/agent"
"github.com/superfly/flyctl/api"
"github.com/superfly/flyctl/client"
"github.com/superfly/flyctl/flypg"
"github.com/superfly/flyctl/internal/appconfig"
"github.com/superfly/flyctl/internal/command"
"github.com/superfly/flyctl/internal/command/apps"
"github.com/superfly/flyctl/internal/flag"
mach "github.com/superfly/flyctl/internal/machine"
"github.com/superfly/flyctl/internal/render"
"github.com/superfly/flyctl/iostreams"
)
func newConfigShow() (cmd *cobra.Command) {
const (
long = `Show Postgres configuration`
short = "Show Postgres configuration"
usage = "show"
)
cmd = command.New(usage, short, long, runConfigShow,
command.RequireSession,
command.RequireAppName,
)
cmd.Aliases = []string{"view"}
flag.Add(cmd,
flag.App(),
flag.AppConfig(),
)
return
}
func runConfigShow(ctx context.Context) error {
var (
client = client.FromContext(ctx).API()
appName = appconfig.NameFromContext(ctx)
)
app, err := client.GetAppCompact(ctx, appName)
if err != nil {
return fmt.Errorf("failed retrieving app %s: %w", appName, err)
}
if !app.IsPostgresApp() {
return fmt.Errorf("app %s is not a postgres app", appName)
}
ctx, err = apps.BuildContext(ctx, app)
if err != nil {
return err
}
switch app.PlatformVersion {
case "machines":
return runMachineConfigShow(ctx, app)
case "nomad":
return runNomadConfigShow(ctx, app)
default:
return fmt.Errorf("unknown platform version")
}
}
func runMachineConfigShow(ctx context.Context, app *api.AppCompact) (err error) {
var (
MinPostgresHaVersion = "0.0.19"
MinPostgresStandaloneVersion = "0.0.7"
MinPostgresFlexVersion = "0.0.3"
)
ctx, err = apps.BuildContext(ctx, app)
if err != nil {
return err
}
machines, err := mach.ListActive(ctx)
if err != nil {
return fmt.Errorf("machines could not be retrieved %w", err)
}
if err := hasRequiredVersionOnMachines(machines, MinPostgresHaVersion, MinPostgresFlexVersion, MinPostgresStandaloneVersion); err != nil {
return err
}
leader, err := pickLeader(ctx, machines)
if err != nil {
return err
}
manager := flypg.StolonManager
if IsFlex(leader) {
manager = flypg.ReplicationManager
}
return showSettings(ctx, app, manager, leader.PrivateIP)
}
func runNomadConfigShow(ctx context.Context, app *api.AppCompact) (err error) {
var (
MinPostgresHaVersion = "0.0.19"
client = client.FromContext(ctx).API()
)
agentclient, err := agent.Establish(ctx, client)
if err != nil {
return errors.Wrap(err, "can't establish agent")
}
if err := hasRequiredVersionOnNomad(app, MinPostgresHaVersion, MinPostgresHaVersion); err != nil {
return err
}
pgInstances, err := agentclient.Instances(ctx, app.Organization.Slug, app.Name)
if err != nil {
return fmt.Errorf("failed to lookup 6pn ip for %s app: %v", app.Name, err)
}
if len(pgInstances.Addresses) == 0 {
return fmt.Errorf("no 6pn ips found for %s app", app.Name)
}
leaderIP, err := leaderIpFromNomadInstances(ctx, pgInstances.Addresses)
if err != nil {
return err
}
return showSettings(ctx, app, flypg.StolonManager, leaderIP)
}
func showSettings(ctx context.Context, app *api.AppCompact, manager string, leaderIP string) error {
var (
io = iostreams.FromContext(ctx)
colorize = io.ColorScheme()
dialer = agent.DialerFromContext(ctx)
)
pgclient := flypg.NewFromInstance(leaderIP, dialer)
var settings []string
for _, k := range pgSettings {
settings = append(settings, k)
}
res, err := pgclient.ViewSettings(ctx, settings, manager)
if err != nil {
return err
}
pendingRestart := false
rows := make([][]string, 0, len(res.Settings))
for _, setting := range res.Settings {
desc := setting.Desc
switch setting.VarType {
case "enum":
e := strings.Join(setting.EnumVals, ", ")
desc = fmt.Sprintf("%s [%s]", desc, e)
case "integer":
desc = fmt.Sprintf("%s (%s, %s)", desc, setting.MinVal, setting.MaxVal)
case "real":
min, err := strconv.ParseFloat(setting.MinVal, 32)
if err != nil {
return nil
}
max, err := strconv.ParseFloat(setting.MaxVal, 32)
if err != nil {
return err
}
desc = fmt.Sprintf("%s (%.1f, %.1f)", desc, min, max)
case "bool":
desc = fmt.Sprintf("%s [on, off]", desc)
}
value := setting.Setting
restart := fmt.Sprint(setting.PendingRestart)
if setting.PendingRestart {
pendingRestart = true
restart = colorize.Bold(restart)
}
if setting.PendingChange != "" {
p := colorize.Bold(fmt.Sprintf("(%s)", setting.PendingChange))
value = fmt.Sprintf("%s -> %s", value, p)
}
rows = append(rows, []string{
strings.ReplaceAll(setting.Name, "_", "-"),
value,
setting.Unit,
desc,
restart,
})
}
_ = render.Table(io.Out, "", rows, "Name", "Value", "Unit", "Description", "Pending Restart")
if pendingRestart {
fmt.Fprintln(io.Out, colorize.Yellow("Some changes are awaiting a restart!"))
fmt.Fprintln(io.Out, colorize.Yellow(fmt.Sprintf("To apply changes, run: `fly postgres restart --app %s`", app.Name)))
}
return nil
}