Platform Engineer Summit - LinuxTips - 2023

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Deploy das Ferramentos de Observabilidade:

• Grafana
• Loki
• Mimir
• Tempo

kubectl apply -f 01-backend.yaml

• Você pode verificar se o serviços estão rodando através do comando kubectl get pods -n observability-backend e o resultado deve ser esse:

NAME                              READY   STATUS    RESTARTS   AGE
grafana-5bcfcc785d-lw8b5          1/1     Running   0          5h38m
loki-0                            1/1     Running   0          5h38m
mimir-0                           1/1     Running   0          5h38m
tempo-7cd894b88f-tkk8j            1/1     Running   0          5h38m

• Abra uma conexão com o serviço do Grafana em uma outra sessão do terminal:

kubectl port-forward -n observability-backend svc/grafana 3000:3000

Instalação Opentelemetry Operator

• Instalação do CertManager como dependência do operator:

kubectl apply -f https://github.com/cert-manager/cert-manager/releases/download/v1.11.0/cert-manager.yaml

• Instalação OpenTelemetry Operator:

kubectl apply -f https://github.com/open-telemetry/opentelemetry-operator/releases/download/v0.74.0/opentelemetry-operator.yaml

• Para verificar se a instalação do Operator ocorreu bem basta executar o seguinte comando substituindo o nome do pod kubectl logs -n opentelemetry-operator-system opentelemetry-operator-controller-manager-7487c6674d-shpbl:

Defaulted container "manager" out of: manager, kube-rbac-proxy
{"level":"info","ts":"2023-04-27T11:28:16.807422088Z","msg":"Starting the OpenTelemetry Operator","opentelemetry-operator":"0.74.0","opentelemetry-collector":"ghcr.io/open-telemetry/opentelemetry-collector-releases/opentelemetry-collector:0.74.0","opentelemetry-targetallocator":"ghcr.io/open-telemetry/opentelemetry-operator/target-allocator:0.74.0","operator-opamp-bridge":"ghcr.io/open-telemetry/opentelemetry-operator/operator-opamp-bridge:0.74.0","auto-instrumentation-java":"ghcr.io/open-telemetry/opentelemetry-operator/autoinstrumentation-java:1.23.0","auto-instrumentation-nodejs":"ghcr.io/open-telemetry/opentelemetry-operator/autoinstrumentation-nodejs:0.34.0","auto-instrumentation-python":"ghcr.io/open-telemetry/opentelemetry-operator/autoinstrumentation-python:0.36b0","auto-instrumentation-dotnet":"ghcr.io/open-telemetry/opentelemetry-operator/autoinstrumentation-dotnet:0.6.0","build-date":"2023-03-29T11:22:05Z","go-version":"go1.20.2","go-arch":"arm64","go-os":"linux","labels-filter":[]}
{"level":"info","ts":"2023-04-27T11:28:16.807667255Z","logger":"setup","msg":"the env var WATCH_NAMESPACE isn't set, watching all namespaces"}
{"level":"info","ts":"2023-04-27T11:28:16.832493297Z","logger":"controller-runtime.metrics","msg":"Metrics server is starting to listen","addr":"127.0.0.1:8080"}
{"level":"info","ts":"2023-04-27T11:28:16.838661213Z","logger":"controller-runtime.builder","msg":"Registering a mutating webhook","GVK":"opentelemetry.io/v1alpha1, Kind=OpenTelemetryCollector","path":"/mutate-opentelemetry-io-v1alpha1-opentelemetrycollector"}
{"level":"info","ts":"2023-04-27T11:28:16.838714338Z","logger":"controller-runtime.webhook","msg":"Registering webhook","path":"/mutate-opentelemetry-io-v1alpha1-opentelemetrycollector"}
{"level":"info","ts":"2023-04-27T11:28:16.838741547Z","logger":"controller-runtime.builder","msg":"Registering a validating webhook","GVK":"opentelemetry.io/v1alpha1, Kind=OpenTelemetryCollector","path":"/validate-opentelemetry-io-v1alpha1-opentelemetrycollector"}
{"level":"info","ts":"2023-04-27T11:28:16.83878788Z","logger":"controller-runtime.webhook","msg":"Registering webhook","path":"/validate-opentelemetry-io-v1alpha1-opentelemetrycollector"}
{"level":"info","ts":"2023-04-27T11:28:16.838815422Z","logger":"controller-runtime.builder","msg":"Registering a mutating webhook","GVK":"opentelemetry.io/v1alpha1, Kind=Instrumentation","path":"/mutate-opentelemetry-io-v1alpha1-instrumentation"}
{"level":"info","ts":"2023-04-27T11:28:16.83883838Z","logger":"controller-runtime.webhook","msg":"Registering webhook","path":"/mutate-opentelemetry-io-v1alpha1-instrumentation"}
{"level":"info","ts":"2023-04-27T11:28:16.838853838Z","logger":"controller-runtime.builder","msg":"Registering a validating webhook","GVK":"opentelemetry.io/v1alpha1, Kind=Instrumentation","path":"/validate-opentelemetry-io-v1alpha1-instrumentation"}
{"level":"info","ts":"2023-04-27T11:28:16.838866088Z","logger":"controller-runtime.webhook","msg":"Registering webhook","path":"/validate-opentelemetry-io-v1alpha1-instrumentation"}
{"level":"info","ts":"2023-04-27T11:28:16.83896938Z","logger":"controller-runtime.webhook","msg":"Registering webhook","path":"/mutate-v1-pod"}
{"level":"info","ts":"2023-04-27T11:28:16.839004005Z","logger":"setup","msg":"starting manager"}
{"level":"info","ts":"2023-04-27T11:28:16.839308422Z","msg":"Starting server","path":"/metrics","kind":"metrics","addr":"127.0.0.1:8080"}
{"level":"info","ts":"2023-04-27T11:28:16.83936588Z","msg":"Starting server","kind":"health probe","addr":"[::]:8081"}
{"level":"info","ts":"2023-04-27T11:28:16.839088963Z","logger":"controller-runtime.webhook.webhooks","msg":"Starting webhook server"}

Deploy da instância do Collector

• Para fazer o deploy da instância do OpenTelemetry Collector basta executar o seguinte comando:

kubectl apply -f 02-otel-collector.yaml

• Verifique se a instalação ocorreu sem erros:

kubectl get pods -n observability-backend
NAME                              READY   STATUS    RESTARTS   AGE
grafana-5bcfcc785d-lw8b5          1/1     Running   0          5h46m
loki-0                            1/1     Running   0          5h46m
mimir-0                           1/1     Running   0          5h46m
otel-collector-569977b889-ggcj4   1/1     Running   0          8m10s
tempo-7cd894b88f-tkk8j            1/1     Running   0          5h46m

Deploy da Aplicação

• Frontend - NodeJS
• Backend - Python
• Backend - Java

kubectl apply -f 03-application.yaml

Veja que os traces ainda não estão chegando no Grafana Tempo

Aplicar o CR de Instrumentation:

kubectl apply -f 04-instrumentation.yaml

• Verifique se o CR foi criado com sucesso kubectl get otelinst -n tutorial-application:

NAME                 AGE     ENDPOINT                                                             SAMPLER                    SAMPLER ARG
my-instrumentation   5h38m   http://otel-collector.observability-backend.svc.cluster.local:4317   parentbased_traceidratio   1

Patch do Frontend:

• Para finalizar a auto-instrumentação precisamos fazer o patch do frontend:

kubectl patch deployment frontend-deployment -n tutorial-application -p '{"spec": {"template":{"metadata":{"annotations":{"instrumentation.opentelemetry.io/inject-sdk":"true"}}}} }'

Após o Patch realizado vamos fazer o rollout das apps:

kubectl rollout restart deployment -n tutorial-application -l app=backend1
kubectl rollout restart deployment -n tutorial-application -l app=backend2
kubectl rollout restart deployment -n tutorial-application -l app=frontend

Veja que os traces AGORA estão chegando no Grafana Tempo