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viz: add examples for `viz stat <svc>` in CLI (#6646) 

* viz: add examples for `viz stat <svc>` in CLI

This PR adds examples showcasing the usage of `viz stat` in the CLI,
along with specific explanation on how it differs from other
stats i.e client side metrics, and the usage of `--to` flag.

Signed-off-by: Tarun Pothulapati <tarunpothulapati@outlook.com>
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Tarun Pothulapati 2021-08-16 09:28:00 +05:30 committed by GitHub
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12
viz/cmd/stat.go
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@ -150,6 +150,18 @@ If no resource name is specified, displays stats about all resources of the spec
# Get all pods in all namespaces that call the hello1 service in the test namespace.
linkerd viz stat pods --to svc/hello1 --to-namespace test --all-namespaces
# Get the web service. With Services, metrics are generated from the outbound metrics
# of clients, and thus will not include unmeshed client request metrics.
linkerd viz stat svc/web
# Get the web services and metrics for any traffic coming to the service from the hello1 deployment
# in the test namespace.
linkerd viz stat svc/web --from deploy/hello1 --from-namespace test
# Get the web services and metrics for all the traffic that reaches the web-pod1 pod
# in the test namespace exclusively.
linkerd viz stat svc/web --to pod/web-pod1 --to-namespace test
# Get all services in all namespaces that receive calls from hello1 deployment in the test namespace.
linkerd viz stat services --from deploy/hello1 --from-namespace test --all-namespaces