mirror of https://github.com/linkerd/linkerd2.git
366ab94519
We add two new commands to the linkerd viz extension: `linkerd viz stat-inbound` and `linkerd viz stat-outbound`. These commands are meant as replacements for the `linkerd viz stat`. The `linkerd viz stat` command provides stats when ServiceProfiles are used whereas the new commands provide stats when xRoute resources are used. Either command can be used when no xRoute or ServiceProfile is used but the new commands include several improvements:
* Inbound and outbound stats are clearly separated into different commands rather than being contextual based on flag combinations
* Route level and backend level stats are displayed together in a tree-view in `linkerd viz stat-outbound` to easily see the effects of retries, timeouts, and traffic splitting
```
> linkerd viz stat-outbound -n schlep deploy
NAME SERVICE ROUTE TYPE BACKEND SUCCESS RPS LATENCY_P50 LATENCY_P95 LATENCY_P99 TIMEOUTS RETRIES
client-http schlep:80 schlep-default HTTPRoute 100.00% 1.00 31ms 387ms 478ms 0.00% 6.25%
└───────────────────────► schlep:80 93.75% 1.07 16ms 88ms 98ms 1.56%
client-grpc schlep:8080 schlep-default GRPCRoute 98.31% 0.98 36ms 425ms 485ms 0.00% 0.00%
├───────────────────────► fail:8080 96.88% 0.53 12ms 24ms 25ms 0.00%
└───────────────────────► good:8080 100.00% 0.45 25ms 95ms 99ms 0.00%
```
```
> linkerd viz stat-inbound -n schlep deploy
NAME SERVER ROUTE TYPE SUCCESS RPS LATENCY_P50 LATENCY_P95 LATENCY_P99
client-grpc [default]:4191 [default] 100.00% 0.10 2ms 3ms 3ms
client-grpc [default]:4191 probe 100.00% 0.20 0ms 1ms 1ms
client-http [default]:4191 [default] 100.00% 0.10 2ms 2ms 2ms
client-http [default]:4191 probe 100.00% 0.20 0ms 1ms 1ms
server-fail [default]:4191 probe 100.00% 0.20 0ms 1ms 1ms
server-fail [default]:4191 [default] 100.00% 0.10 2ms 2ms 2ms
server-fail [default]:8080 [default] 94.87% 1.30 0ms 1ms 1ms
server-good [default]:4191 [default] 100.00% 0.10 0ms 1ms 1ms
server-good [default]:4191 probe 100.00% 0.20 0ms 1ms 1ms
server-good [default]:8080 [default] 100.00% 0.73 8ms 92ms 98ms
server-slow [default]:4191 [default] 100.00% 0.10 0ms 1ms 1ms
server-slow [default]:4191 probe 100.00% 0.20 0ms 1ms 1ms
```
Unlike the `linkerd viz stat` command, these commands query prometheus directly rather than going through the intermediary of the metrics-api. If prometheus is enabled in linkerd-viz, these commands will use a port-forward to connect to that prometheus instance. If an external prometheus is configured, these commands will attempt to use that prometheus URL; however note that the prometheus URL must be reachable from where the CLI is executed for this to work. This can be overridden by a `--prometheusURL` flag.
Json and table output are both supported.
Signed-off-by: Alex Leong <alex@buoyant.io>
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