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Serve the read verbs on the serving controller's own connection, and name every connection

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Each verb ran as a process that dialled the bus, so hundreds of short
connections an hour, all named mesh-controller, hid any client reconnecting
in a loop (hq issue 327). D15 now says a user whose connections keep dropping.
This commit is contained in:
jochen
2026-10-08 21:08:34 +02:00
parent ca09a07fdf
commit 1e04670052
21 changed files with 744 additions and 80 deletions
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cmd/mesh-controller/conditions.go
+26 -25
View File
@@ -5,6 +5,7 @@ import (
"errors"
"flag"
"fmt"
"io"
"os"
"slices"
"strconv"
@@ -107,18 +108,18 @@ func conditionsCommand(ctx context.Context, args []string) error {
}
switch sub {
case "list":
return listConditions(ctx, args)
return listConditions(ctx, args, os.Stdout)
case "show":
return showCondition(ctx, args)
return showCondition(ctx, args, os.Stdout)
case "silence":
return silenceCondition(ctx, args)
case "history":
return conditionHistory(ctx, args)
return conditionHistory(ctx, args, os.Stdout)
}
return errors.New(conditionsUsage)
}
func listConditions(ctx context.Context, args []string) error {
func listConditions(ctx context.Context, args []string, w io.Writer) error {
set := flag.NewFlagSet("conditions", flag.ContinueOnError)
scope := set.String("scope", "", "only this scope: "+strings.Join(conditions.Scopes, ", "))
severity := set.String("severity", "", "only urgent, or only warning")
@@ -144,20 +145,20 @@ func listConditions(ctx context.Context, args []string) error {
}
}
if *asJSON {
return printJSON(map[string]any{"conditions": inBrief(out), "open": len(open), "counted": counted(out),
return printJSONTo(w, map[string]any{"conditions": inBrief(out), "open": len(open), "counted": counted(out),
"note": "urgent first, then oldest first; a condition clears when observation says so, never by hand; " +
"each with its newest evidence — `conditions key=<key>` gives one whole"})
}
if len(out) == 0 {
if len(open) == 0 {
fmt.Println("no open conditions")
fmt.Fprintln(w, "no open conditions")
} else {
fmt.Printf("none of the %d open condition(s) is about that\n", len(open))
fmt.Fprintf(w, "none of the %d open condition(s) is about that\n", len(open))
}
return nil
}
for _, line := range conditionLines(out, time.Now()) {
fmt.Println(line)
fmt.Fprintln(w, line)
}
return nil
}
@@ -233,7 +234,7 @@ func conditionLines(list []conditions.Condition, now time.Time) []string {
return out
}
func showCondition(ctx context.Context, args []string) error {
func showCondition(ctx context.Context, args []string, w io.Writer) error {
set := flag.NewFlagSet("conditions show", flag.ContinueOnError)
asJSON := set.Bool("json", false, "as data")
rest, err := parseAround(set, args)
@@ -266,34 +267,34 @@ func showCondition(ctx context.Context, args []string) error {
"history --key %s` what became of it", key, key)
}
if *asJSON {
return printJSON(c)
return printJSONTo(w, c)
}
now := time.Now()
fmt.Printf("%s %s\n %s\n\n", strings.ToUpper(string(c.Severity)), c.Key, c.Summary)
fmt.Printf(" kind %s\n about %s %s", c.Kind, c.Subject.Scope, c.Subject.ID)
fmt.Fprintf(w, "%s %s\n %s\n\n", strings.ToUpper(string(c.Severity)), c.Key, c.Summary)
fmt.Fprintf(w, " kind %s\n about %s %s", c.Kind, c.Subject.Scope, c.Subject.ID)
if c.Subject.Machine != "" {
fmt.Printf(", on %s", c.Subject.Machine)
fmt.Fprintf(w, ", on %s", c.Subject.Machine)
}
fmt.Printf("\n raised by %s\n since %s (%s ago), observed %d time(s), last %s ago\n",
fmt.Fprintf(w, "\n raised by %s\n since %s (%s ago), observed %d time(s), last %s ago\n",
c.Source, c.Raised.Local().Format("2006-01-02 15:04:05"), roughly(now.Sub(c.Raised)), c.Observations,
now.Sub(c.LastObserved).Round(time.Second))
if c.Count > 1 {
fmt.Printf(" raised %d times, each within ten minutes of clearing\n", c.Count)
fmt.Fprintf(w, " raised %d times, each within ten minutes of clearing\n", c.Count)
}
fmt.Printf(" resolved by %s\n", resolverWords(c.Resolver))
fmt.Fprintf(w, " resolved by %s\n", resolverWords(c.Resolver))
if c.Silenced != nil {
fmt.Printf(" silenced until %s by %s: %s\n", c.Silenced.Until.Local().Format("2006-01-02 15:04"),
fmt.Fprintf(w, " silenced until %s by %s: %s\n", c.Silenced.Until.Local().Format("2006-01-02 15:04"),
c.Silenced.By, c.Silenced.Why)
}
if len(c.Tried) > 0 {
fmt.Println("\n tried:")
fmt.Fprintln(w, "\n tried:")
for _, t := range c.Tried {
fmt.Printf(" %s %s — %s: %s\n", t.At.Local().Format("2006-01-02 15:04"), orHealer(t.By), t.What, t.Outcome)
fmt.Fprintf(w, " %s %s — %s: %s\n", t.At.Local().Format("2006-01-02 15:04"), orHealer(t.By), t.What, t.Outcome)
}
}
fmt.Println("\n evidence, newest first:")
fmt.Fprintln(w, "\n evidence, newest first:")
for _, e := range c.Evidence {
fmt.Printf(" %s %s\n", e.At.Local().Format("2006-01-02 15:04:05"), e.Said)
fmt.Fprintf(w, " %s %s\n", e.At.Local().Format("2006-01-02 15:04:05"), e.Said)
}
return nil
}
@@ -378,7 +379,7 @@ func parseFor(s string) (time.Duration, error) {
return d, nil
}
func conditionHistory(ctx context.Context, args []string) error {
func conditionHistory(ctx context.Context, args []string, w io.Writer) error {
set := flag.NewFlagSet("conditions history", flag.ContinueOnError)
days := set.Int("days", 7, "how many days back, at most 90")
key := set.String("key", "", "only this condition")
@@ -420,10 +421,10 @@ func conditionHistory(ctx context.Context, args []string) error {
if out == nil {
out = []conditions.Event{}
}
return printJSON(map[string]any{"history": out, "days": *days})
return printJSONTo(w, map[string]any{"history": out, "days": *days})
}
if len(out) == 0 {
fmt.Printf("nothing was raised, changed or cleared in the last %d day(s)\n", *days)
fmt.Fprintf(w, "nothing was raised, changed or cleared in the last %d day(s)\n", *days)
return nil
}
for _, e := range out {
@@ -440,7 +441,7 @@ func conditionHistory(ctx context.Context, args []string) error {
line += " — " + e.Why
}
}
fmt.Println(line)
fmt.Fprintln(w, line)
}
return nil
}