Linkerd2 Demo Case 介紹
步驟
###Step 1: Install the CLI###
curl -sL run.linkerd.io/install | sh
export PATH=$PATH:/home/liudanny/.linkerd2/bin
###Step 2: Validate your Kubernetes cluster###
linkerd check --pre
###Step 3: Install the control plane onto your cluster###
linkerd install | kubectl apply -f -
linkerd check
linkerd viz install | kubectl apply -f - # on-cluster metrics stack
###Step 4: Explore Linkerd
linkerd viz dashboard &
linkerd -n **linkerd-viz** viz top deploy/web
###Step 5: Install the demo app###
curl -sL <https://run.linkerd.io/emojivoto.yml> \\
| kubectl apply -f -
#add Linkerd to emojivoto by running
kubectl get -n emojivoto deploy -o yaml \\
| linkerd inject - \\
| kubectl apply -f -
linkerd -n emojivoto check --proxy
###Step 6: Watch it run###
linkerd -n emojivoto viz stat deploy
linkerd -n emojivoto viz top deploy
linkerd -n emojivoto viz tap deploy/web
###Step 7 (uninstall)###
kubectl get -n emojivoto deploy -o yaml \\
| linkerd uninject - \\
| kubectl apply -f -
curl -sL <https://run.linkerd.io/emojivoto.yml> \\
| kubectl delete -f -
linkerd viz uninstall | kubectl delete -f -
linkerd uninstall | kubectl delete -f -
實驗
###測試自己的namespace
$kubectl get -n default deploy -o yaml \\
| linkerd inject - \\
| kubectl apply -f -
$kubectl exec tiefighter -- curl -s -XPOST deathstar.default.svc.cluster.local/v1/request-landing
#uninject
$kubectl get -n default deploy -o yaml \\
| linkerd uninject - \\
| kubectl apply -f -
### not work!!!
$kubectl get -n default pod -o yaml \\
| linkerd inject - \\
| kubectl apply -f -
#uninject
$kubectl get -n default pod -o yaml \\
| linkerd uninject - \\
| kubectl apply -f -
心得
View the Linkerd dashboard and see all the services in the demo app. Since the demo app comes with a load generator, we can see live traffic metrics HTTP/2（gRPC）和HTTP/1（web frontend） by running: linkerd -n emojivoto viz stat deploy
This will show the “golden” metrics for each deployment:
- Success rates
- Request rates
- Latency distribution percentiles
Inject function is very convenient for users.
There is no service perspective for metrics, but deployment/Pods/... can kind of cover this.
相關執行結果參考
$ k get all -n emojivoto
NAME READY STATUS RESTARTS AGE
pod/emoji-696d9d8f95-p2xv5 2/2 Running 0 64m
pod/vote-bot-6d7677bb68-tmbfq 2/2 Running 0 64m
pod/voting-ff4c54b8d-whssp 2/2 Running 0 64m
pod/web-5f86686c4d-l8lcb 2/2 Running 0 64m
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/emoji-svc ClusterIP 10.106.16.101 <none> 8080/TCP,8801/TCP 105m
service/voting-svc ClusterIP 10.109.94.225 <none> 8080/TCP,8801/TCP 105m
service/web-svc ClusterIP 10.100.247.154 <none> 80/TCP 105m
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/emoji 1/1 1 1 105m
deployment.apps/vote-bot 1/1 1 1 105m
deployment.apps/voting 1/1 1 1 105m
deployment.apps/web 1/1 1 1 105m
NAME DESIRED CURRENT READY AGE
replicaset.apps/emoji-66ccdb4d86 0 0 0 105m
replicaset.apps/emoji-696d9d8f95 1 1 1 64m
replicaset.apps/vote-bot-69754c864f 0 0 0 105m
replicaset.apps/vote-bot-6d7677bb68 1 1 1 64m
replicaset.apps/voting-f999bd4d7 0 0 0 105m
replicaset.apps/voting-ff4c54b8d 1 1 1 64m
replicaset.apps/web-5f86686c4d 1 1 1 64m
replicaset.apps/web-79469b946f 0 0 0 105m
$ linkerd -n emojivoto viz stat deploy
NAME MESHED SUCCESS RPS LATENCY_P50 LATENCY_P95 LATENCY_P99 TCP_CONN
emoji 1/1 100.00% 2.3rps 1ms 1ms 1ms 3
vote-bot 1/1 100.00% 0.3rps 1ms 1ms 1ms 1
voting 1/1 87.01% 1.3rps 1ms 1ms 2ms 3
web 1/1 91.91% 2.3rps 2ms 16ms 19ms 3
$ linkerd -n emojivoto viz top deploy
(press q to quit)
(press a/LeftArrowKey to scroll left, d/RightArrowKey to scroll right)
Source Destination Method Path Count Best Worst Last Success Rate
web-5f86686c4d-l8lcb emoji-696d9d8f95-p2xv5 POST /emojivoto.v1.EmojiService/ListAll 42 562µs 5ms 937µs 100.00%
vote-bot-6d7677bb68-tmbfq web-5f86686c4d-l8lcb GET /api/list 42 3ms 13ms 9ms 100.00%
web-5f86686c4d-l8lcb emoji-696d9d8f95-p2xv5 POST /emojivoto.v1.EmojiService/FindByShortcode 42 553µs 13ms 2ms 100.00%
vote-bot-6d7677bb68-tmbfq web-5f86686c4d-l8lcb GET /api/vote 41 5ms 21ms 6ms 87.80%
web-5f86686c4d-l8lcb voting-ff4c54b8d-whssp POST /emojivoto.v1.VotingService/VoteDoughnut 6 926µs 3ms 2ms 0.00%
web-5f86686c4d-l8lcb voting-ff4c54b8d-whssp POST /emojivoto.v1.VotingService/VoteMrsClaus 4 1ms 2ms 2ms 100.00%
web-5f86686c4d-l8lcb voting-ff4c54b8d-whssp POST /emojivoto.v1.VotingService/VoteRocket 2 2ms 3ms 3ms 100.00%
web-5f86686c4d-l8lcb voting-ff4c54b8d-whssp POST /emojivoto.v1.VotingService/VotePointUp2 2 2ms 3ms 3ms 100.00%
web-5f86686c4d-l8lcb voting-ff4c54b8d-whssp POST /emojivoto.v1.VotingService/VoteCrossedSwords 2 2ms 3ms 3ms 100.00%
web-5f86686c4d-l8lcb voting-ff4c54b8d-whssp POST /emojivoto.v1.VotingService/VoteWorldMap 2 739µs 2ms 2ms 100.00%
web-5f86686c4d-l8lcb voting-ff4c54b8d-whssp POST /emojivoto.v1.VotingService/VoteDog 2 2ms 2ms 2ms 100.00%
web-5f86686c4d-l8lcb voting-ff4c54b8d-whssp POST /emojivoto.v1.VotingService/VoteOkWoman 2 951µs 2ms 2ms 100.00%
web-5f86686c4d-l8lcb voting-ff4c54b8d-whssp POST /emojivoto.v1.VotingService/VoteNerdFace 2 2ms 9ms 9ms 100.00%
web-5f86686c4d-l8lcb voting-ff4c54b8d-whssp POST /emojivoto.v1.VotingService/VoteConstructionWorkerMan 2 1ms 3ms 3ms 100.00%
web-5f86686c4d-l8lcb voting-ff4c54b8d-whssp POST /emojivoto.v1.VotingService/VoteCheckeredFlag 2 863µs 3ms 863µs 100.00%
web-5f86686c4d-l8lcb voting-ff4c54b8d-whssp POST /emojivoto.v1.VotingService/Vote100 2 894µs 2ms 894µs 100.00%
web-5f86686c4d-l8lcb voting-ff4c54b8d-whssp POST /emojivoto.v1.VotingService/VotePizza 2 1ms 3ms 3ms 100.00%
web-5f86686c4d-l8lcb voting-ff4c54b8d-whssp POST /emojivoto.v1.VotingService/VoteJackOLantern 2 884µs 3ms 3ms 100.00%
web-5f86686c4d-l8lcb voting-ff4c54b8d-whssp POST /emojivoto.v1.VotingService/VoteManDancing 2 761µs 1ms 1ms 100.00%
web-5f86686c4d-l8lcb voting-ff4c54b8d-whssp POST /emojivoto.v1.VotingService/VoteBeachUmbrella 2 1ms 2ms 1ms 100.00%
web-5f86686c4d-l8lcb voting-ff4c54b8d-whssp POST /emojivoto.v1.VotingService/VoteNoGoodWoman 2 1ms 2ms 2ms 100.00%
web-5f86686c4d-l8lcb voting-ff4c54b8d-whssp POST /emojivoto.v1.VotingService/VoteGuardsman 2 968µs 2ms 2ms 100.00%
**$ linkerd -n emojivoto viz tap deploy/web**
req id=11:0 proxy=in src=10.244.109.92:46446 dst=10.244.109.115:8080 tls=true :method=GET :authority=web-svc.emojivoto:80 :path=/api/list
req id=11:1 proxy=out src=10.244.109.115:55194 dst=10.244.109.109:8080 tls=true :method=POST :authority=emoji-svc.emojivoto:8080 :path=/emojivoto.v1.EmojiService/ListAll
rsp id=11:1 proxy=out src=10.244.109.115:55194 dst=10.244.109.109:8080 tls=true :status=200 latency=1792µs
end id=11:1 proxy=out src=10.244.109.115:55194 dst=10.244.109.109:8080 tls=true grpc-status=OK duration=193µs response-length=2140B
rsp id=11:0 proxy=in src=10.244.109.92:46446 dst=10.244.109.115:8080 tls=true :status=200 latency=4294µs
end id=11:0 proxy=in src=10.244.109.92:46446 dst=10.244.109.115:8080 tls=true duration=358µs response-length=4513B
req id=11:2 proxy=in src=10.244.109.92:46446 dst=10.244.109.115:8080 tls=true :method=GET :authority=web-svc.emojivoto:80 :path=/api/vote
req id=11:3 proxy=out src=10.244.109.115:55194 dst=10.244.109.109:8080 tls=true :method=POST :authority=emoji-svc.emojivoto:8080 :path=/emojivoto.v1.EmojiService/FindByShortcode
rsp id=11:3 proxy=out src=10.244.109.115:55194 dst=10.244.109.109:8080 tls=true :status=200 latency=1657µs
end id=11:3 proxy=out src=10.244.109.115:55194 dst=10.244.109.109:8080 tls=true grpc-status=OK duration=175µs response-length=25B
req id=11:4 proxy=out src=10.244.109.115:33470 dst=10.244.109.84:8080 tls=true :method=POST :authority=voting-svc.emojivoto:8080 :path=/emojivoto.v1.VotingService/VoteDoughnut
rsp id=11:4 proxy=out src=10.244.109.115:33470 dst=10.244.109.84:8080 tls=true :status=200 latency=2217µs
end id=11:4 proxy=out src=10.244.109.115:33470 dst=10.244.109.84:8080 tls=true grpc-status=Unknown duration=161µs response-length=0B
rsp id=11:2 proxy=in src=10.244.109.92:46446 dst=10.244.109.115:8080 tls=true :status=500 latency=8272µs
end id=11:2 proxy=in src=10.244.109.92:46446 dst=10.244.109.115:8080 tls=true duration=171µs response-length=51B
req id=11:5 proxy=in src=10.244.109.92:46446 dst=10.244.109.115:8080 tls=true :method=GET :authority=web-svc.emojivoto:80 :path=/api/list
req id=11:6 proxy=out src=10.244.109.115:55194 dst=10.244.109.109:8080 tls=true :method=POST :authority=emoji-svc.emojivoto:8080 :path=/emojivoto.v1.EmojiService/ListAll
rsp id=11:6 proxy=out src=10.244.109.115:55194 dst=10.244.109.109:8080 tls=true :status=200 latency=1483µs
end id=11:6 proxy=out src=10.244.109.115:55194 dst=10.244.109.109:8080 tls=true grpc-status=OK duration=145µs response-length=2140B
rsp id=11:5 proxy=in src=10.244.109.92:46446 dst=10.244.109.115:8080 tls=true :status=200 latency=5621µs
end id=11:5 proxy=in src=10.244.109.92:46446 dst=10.244.109.115:8080 tls=true duration=336µs response-length=4513B
req id=11:7 proxy=in src=10.244.109.92:46446 dst=10.244.109.115:8080 tls=true :method=GET :authority=web-svc.emojivoto:80 :path=/api/vote
req id=11:8 proxy=out src=10.244.109.115:55194 dst=10.244.109.109:8080 tls=true :method=POST :authority=emoji-svc.emojivoto:8080 :path=/emojivoto.v1.EmojiService/FindByShortcode
rsp id=11:8 proxy=out src=10.244.109.115:55194 dst=10.244.109.109:8080 tls=true :status=200 latency=1477µs
end id=11:8 proxy=out src=10.244.109.115:55194 dst=10.244.109.109:8080 tls=true grpc-status=OK duration=206µs response-length=28B
req id=11:9 proxy=out src=10.244.109.115:33470 dst=10.244.109.84:8080 tls=true :method=POST :authority=voting-svc.emojivoto:8080 :path=/emojivoto.v1.VotingService/VoteManDancing
rsp id=11:9 proxy=out src=10.244.109.115:33470 dst=10.244.109.84:8080 tls=true :status=200 latency=1560µs
end id=11:9 proxy=out src=10.244.109.115:33470 dst=10.244.109.84:8080 tls=true grpc-status=OK duration=144µs response-length=5B
rsp id=11:7 proxy=in src=10.244.109.92:46446 dst=10.244.109.115:8080 tls=true :status=200 latency=7140µs
end id=11:7 proxy=in src=10.244.109.92:46446 dst=10.244.109.115:8080 tls=true duration=96µs response-length=0B
req id=11:10 proxy=in src=10.244.109.92:46446 dst=10.244.109.115:8080 tls=true :method=GET :authority=web-svc.emojivoto:80 :path=/api/list
req id=11:11 proxy=out src=10.244.109.115:55194 dst=10.244.109.109:8080 tls=true :method=POST :authority=emoji-svc.emojivoto:8080 :path=/emojivoto.v1.EmojiService/ListAll
rsp id=11:11 proxy=out src=10.244.109.115:55194 dst=10.244.109.109:8080 tls=true :status=200 latency=1855µs
end id=11:11 proxy=out src=10.244.109.115:55194 dst=10.244.109.109:8080 tls=true grpc-status=OK duration=375µs response-length=2140B
rsp id=11:10 proxy=in src=10.244.109.92:46446 dst=10.244.109.115:8080 tls=true :status=200 latency=3786µs
end id=11:10 proxy=in src=10.244.109.92:46446 dst=10.244.109.115:8080 tls=true duration=339µs response-length=4513B
req id=11:12 proxy=in src=10.244.109.92:46446 dst=10.244.109.115:8080 tls=true :method=GET :authority=web-svc.emojivoto:80 :path=/api/vote
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