feat(day-02): add instructions for second day

Today, we learned: 1. Define multiple containers in a pod 2. Set limits to avoid one service messing up the others 3. Use volumes so the contents of a container are kept between restarts
2024-05-15 21:14:32 +00:00 · 2024-05-15 21:14:32 +00:00 · 0aa2d04d1a
commit 0aa2d04d1a
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--- a/README.md
+++ b/README.md
@ -28,6 +28,7 @@ kubectl 1.29.4
 ## Curso por dias

 * [dia-01][dia-01]: subindo primeiro _cluster_ com [`kind`][kind] e fazendo _deploy_ do primeiro `pod`
+* [dia-02][dia-02]: realizando _deploy_ de `pod` com múltiplos _containers_, definição de volume e limitação de recursos

 Pode ser seguido em no 

@ -35,3 +36,4 @@ Pode ser seguido em no
 [mise-guide]: https://mise.jdx.dev/getting-started.html#quickstart
 [kind]: https://kind.sigs.k8s.io/
 [dia-01]: ./day-001/README.md
+[dia-02]: ./day-002/README.md
--- a/day-002/README.md
+++ b/day-002/README.md
@ -0,0 +1,155 @@
+# Descomplicando `Kubernetes` - Dia 02
+
+## _Deploy_ do `pod`
+
+Inicialmente precisamos subir o _cluster_ com [`kind`][kind], seguindo as instruções do [dia-01][dia-01].
+
+Com o _cluster_ rodando, podemos fazer o _deploy_ do nosso `pod` usando o comando:
+
+```bash
+kubectl apply -f pod.yml
+```
+
+Veja os detalhes do `pod` criado usando o comando:
+
+```bash
+kubectl describe pods
+```
+
+No resultado precisamos garantir que:
+
+1. Os _containers_ `nginx`, `echo` e `shell` existam
+2. Limites de recursos existam
+3. O _container_ `nginx` tenha um novo volume no caminho `/opt/nginx`
+
+<details>
+<summary>Esse é um exemplo do resultado gerado</summary>
+
+```
+Name:             podsmania
+Namespace:        default
+Priority:         0
+Service Account:  default
+Node:             dk8s-day-001-worker/172.21.0.4
+Start Time:       Wed, 15 May 2024 20:46:58 +0000
+Labels:           run=podsmania
+                  service=webserver
+Annotations:      <none>
+Status:           Running
+IP:               10.244.2.7
+IPs:
+  IP:  10.244.2.7
+Containers:
+  nginx:
+    Container ID:   containerd://88dc17958d8239662a337239b354d54e93e83e085fec6314509810b83b8ac7f5
+    Image:          nginx
+    Image ID:       docker.io/library/nginx@sha256:a484819eb60211f5299034ac80f6a681b06f89e65866ce91f356ed7c72af059c
+    Port:           <none>
+    Host Port:      <none>
+    State:          Running
+      Started:      Wed, 15 May 2024 20:47:00 +0000
+    Ready:          True
+    Restart Count:  0
+    Limits:
+      cpu:     500m
+      memory:  128Mi
+    Requests:
+      cpu:        300m
+      memory:     96Mi
+    Environment:  <none>
+    Mounts:
+      /opt/nginx from custom-nginx-opt (rw)
+      /var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-6s7g9 (ro)
+  echo:
+    Container ID:   containerd://6160153c3a075864a8cbbd54a0d9544c87ae1e9b75f2282919422e65f2e7113a
+    Image:          ealen/echo-server
+    Image ID:       docker.io/ealen/echo-server@sha256:ec8a6e95890df937a1eb5fafca033a32172d4f43c1fea1f302931d5f230a137f
+    Port:           <none>
+    Host Port:      <none>
+    State:          Running
+      Started:      Wed, 15 May 2024 20:47:02 +0000
+    Ready:          True
+    Restart Count:  0
+    Limits:
+      cpu:     500m
+      memory:  128Mi
+    Requests:
+      cpu:     250m
+      memory:  96Mi
+    Environment:
+      PORT:  3000
+    Mounts:
+      /var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-6s7g9 (ro)
+  shell:
+    Container ID:  containerd://5bccc9905d38438ee05954cdb2e7283dfdb6e1a95ce7c260740887a13ee1ef64
+    Image:         ubuntu
+    Image ID:      docker.io/library/ubuntu@sha256:3f85b7caad41a95462cf5b787d8a04604c8262cdcdf9a472b8c52ef83375fe15
+    Port:          <none>
+    Host Port:     <none>
+    Args:
+      sleep
+      infinity
+    State:          Running
+      Started:      Wed, 15 May 2024 20:47:04 +0000
+    Ready:          True
+    Restart Count:  0
+    Limits:
+      cpu:     250m
+      memory:  96Mi
+    Requests:
+      cpu:        100m
+      memory:     32Mi
+    Environment:  <none>
+    Mounts:
+      /var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-6s7g9 (ro)
+Conditions:
+  Type                        Status
+  PodReadyToStartContainers   True
+  Initialized                 True
+  Ready                       True
+  ContainersReady             True
+  PodScheduled                True
+Volumes:
+  custom-nginx-opt:
+    Type:       EmptyDir (a temporary directory that shares a pod's lifetime)
+    Medium:
+    SizeLimit:  256Mi
+  kube-api-access-6s7g9:
+    Type:                    Projected (a volume that contains injected data from multiple sources)
+    TokenExpirationSeconds:  3607
+    ConfigMapName:           kube-root-ca.crt
+    ConfigMapOptional:       <nil>
+    DownwardAPI:             true
+QoS Class:                   Burstable
+Node-Selectors:              <none>
+Tolerations:                 node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
+                             node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
+Events:
+  Type    Reason     Age   From               Message
+  ----    ------     ----  ----               -------
+  Normal  Scheduled  18m   default-scheduler  Successfully assigned default/podsmania to dk8s-day-001-worker
+  Normal  Pulling    18m   kubelet            Pulling image "nginx"
+  Normal  Pulled     18m   kubelet            Successfully pulled image "nginx" in 1.481s (1.481s including waiting)
+  Normal  Created    18m   kubelet            Created container nginx
+  Normal  Started    18m   kubelet            Started container nginx
+  Normal  Pulling    18m   kubelet            Pulling image "ealen/echo-server"
+  Normal  Pulled     18m   kubelet            Successfully pulled image "ealen/echo-server" in 1.86s (1.86s including waiting)
+  Normal  Created    18m   kubelet            Created container echo
+  Normal  Started    18m   kubelet            Started container echo
+  Normal  Pulling    18m   kubelet            Pulling image "ubuntu"
+  Normal  Pulled     18m   kubelet            Successfully pulled image "ubuntu" in 1.597s (1.597s including waiting)
+  Normal  Created    18m   kubelet            Created container shell
+  Normal  Started    18m   kubelet            Started container shell
+```
+</details>
+
+### Limpando o _deploy_
+
+Para remover o `pod` criado, executamos o comando:
+
+```bash
+kubectl delete -f pod.yml
+```
+
+[kind]: https://kind.sigs.k8s.io/
+[dia-01]: ./day-001/README.md
--- a/day-002/pod.yml
+++ b/day-002/pod.yml
@ -0,0 +1,52 @@
+---
+apiVersion: v1
+kind: Pod
+metadata:
+  labels:
+    run: podsmania
+    service: webserver
+  name: podsmania
+spec:
+  containers:
+    - image: nginx
+      name: nginx
+      resources:
+        limits:
+          cpu: '0.5'
+          memory: '128Mi'
+        requests:
+          cpu: '0.3'
+          memory: '96Mi'
+      volumeMounts:
+        - mountPath: /opt/nginx
+          name: custom-nginx-opt
+    - image: ealen/echo-server
+      name: echo
+      resources:
+        limits:
+          cpu: '0.5'
+          memory: '128Mi'
+        requests:
+          cpu: '0.25'
+          memory: '96Mi'
+      env:
+        - name: PORT
+          value: '3000'
+    - image: ubuntu
+      name: shell
+      args:
+        - sleep
+        - infinity
+      resources:
+        limits: 
+          cpu: '0.25'
+          memory: '96Mi'
+        requests:
+          cpu: '0.1'
+          memory: '32Mi'
+  dnsPolicy: ClusterFirst
+  restartPolicy: Always
+  volumes:
+    - name: custom-nginx-opt
+      emptyDir:
+        sizeLimit: '256Mi'