本文為英文版的機器翻譯版本，如內容有任何歧義或不一致之處，概以英文版為準。
# 步驟 4：將應用程式部署至 Amazon EKS，並將資料寫入資料表
在教學課程的此步驟中，您可以為應用程式設定 Amazon EKS 部署，並確認應用程式正在執行，並且可以連線至 Amazon Keyspaces。
若要將應用程式部署到 Amazon EKS，您需要在名為 的檔案中設定所有相關設定`deployment.yaml`。然後，Amazon EKS 會使用此檔案來部署應用程式。檔案中的中繼資料應包含下列資訊：
+ **應用程式名稱** 應用程式的名稱。在本教學課程中，我們使用 `my-keyspaces-app`。
+ **Kubernetes 命名空間** Amazon EKS 叢集的命名空間。在本教學課程中，我們使用 `my-eks-namespace`。
+ **Amazon EKS 服務帳戶名稱** Amazon EKS 服務帳戶的名稱。在本教學課程中，我們使用 `my-eks-serviceaccount`。
+ **映像名稱** 應用程式映像的名稱。在本教學課程中，我們使用 `my-keyspaces-app`。
+ **映像 URI** 來自 Amazon ECR 的 Docker 映像 URI。
+ **AWS 帳戶 ID** 您的 AWS 帳戶 ID。
+ **IAM 角色 ARN** 為服務帳戶所建立之 IAM 角色的 ARN。在本教學課程中，我們使用 `my-iam-role`。
+ AWS 區域 您建立 **AWS 區域 Amazon EKS 叢集** 所在的 Amazon EKS 叢集。
在此步驟中，您會部署並執行連線至 Amazon Keyspaces 並將資料寫入資料表的應用程式。
1. 設定 `deployment.yaml` 檔案。您需要取代下列值：
+ `name`
+ `namespace`
+ `serviceAccountName`
+ `image`
+ `AWS_ROLE_ARN value`
+ AWS 區域 中的 `CASSANDRA_HOST`
+ `AWS_REGION`
您可以使用下列檔案做為範例。
```
apiVersion: apps/v1
kind: Deployment
metadata:
name: my-keyspaces-app
namespace: my-eks-namespace
spec:
replicas: 1
selector:
matchLabels:
app: my-keyspaces-app
template:
metadata:
labels:
app: my-keyspaces-app
spec:
serviceAccountName: my-eks-serviceaccount
containers:
- name: my-keyspaces-app
image: 111122223333.dkr.ecr.us-east-1.amazonaws.com/my-ecr-repository:latest
ports:
- containerPort: 8080
env:
- name: CASSANDRA_HOST
value: "cassandra.us-east-1.amazonaws.com:9142"
- name: CASSANDRA_DC
value: "us-east-1"
- name: AWS_WEB_IDENTITY_TOKEN_FILE
value: /var/run/secrets/eks.amazonaws.com/serviceaccount/token
- name: AWS_ROLE_ARN
value: "arn:aws:iam::111122223333:role/my-iam-role"
- name: AWS_REGION
value: "us-east-1"
```
1. 部署 `deployment.yaml`。
```
kubectl apply -f deployment.yaml
```
輸出看起來應該像這樣。
```
deployment.apps/my-keyspaces-app created
```
1. 檢查 Amazon EKS 叢集命名空間中 Pod 的狀態。
```
kubectl get pods -n my-eks-namespace
```
輸出看起來應該與此範例類似。
```
NAME READY STATUS RESTARTS AGE
my-keyspaces-app-123abcde4f-g5hij 1/1 Running 0 75s
```
如需詳細資訊，您可以使用下列命令。
```
kubectl describe pod my-keyspaces-app-123abcde4f-g5hij -n my-eks-namespace
```
```
Name: my-keyspaces-app-123abcde4f-g5hij
Namespace: my-eks-namespace
Priority: 2000001000
Priority Class Name: system-node-critical
Service Account: my-eks-serviceaccount
Node: fargate-ip-192-168-102-209.ec2.internal/192.168.102.209
Start Time: Thu, 23 Nov 2023 12:15:43 +0000
Labels: app=my-keyspaces-app
eks.amazonaws.com/fargate-profile=my-fargate-profile
pod-template-hash=6c56fccc56
Annotations: CapacityProvisioned: 0.25vCPU 0.5GB
Logging: LoggingDisabled: LOGGING_CONFIGMAP_NOT_FOUND
Status: Running
IP: 192.168.102.209
IPs:
IP: 192.168.102.209
Controlled By: ReplicaSet/my-keyspaces-app-6c56fccc56
Containers:
my-keyspaces-app:
Container ID: containerd://41ff7811d33ae4bc398755800abcdc132335d51d74f218ba81da0700a6f8c67b
Image: 111122223333.dkr.ecr.us-east-1.amazonaws.com/my_eks_repository:latest
Image ID: 111122223333.dkr.ecr.us-east-1.amazonaws.com/my_eks_repository@sha256:fd3c6430fc5251661efce99741c72c1b4b03061474940200d0524b84a951439c
Port: 8080/TCP
Host Port: 0/TCP
State: Running
Started: Thu, 23 Nov 2023 12:15:19 +0000
Finished: Thu, 23 Nov 2023 12:16:17 +0000
Ready: True
Restart Count: 1
Environment:
CASSANDRA_HOST: cassandra.us-east-1.amazonaws.com:9142
CASSANDRA_DC: us-east-1
AWS_WEB_IDENTITY_TOKEN_FILE: /var/run/secrets/eks.amazonaws.com/serviceaccount/token
AWS_ROLE_ARN: arn:aws:iam::111122223333:role/my-iam-role
AWS_REGION: us-east-1
AWS_STS_REGIONAL_ENDPOINTS: regional
Mounts:
/var/run/secrets/eks.amazonaws.com/serviceaccount from aws-iam-token (ro)
/var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-fssbf (ro)
Conditions:
Type Status
Initialized True
Ready True
ContainersReady True
PodScheduled True
Volumes:
aws-iam-token:
Type: Projected (a volume that contains injected data from multiple sources)
TokenExpirationSeconds: 86400
kube-api-access-fssbf:
Type: Projected (a volume that contains injected data from multiple sources)
TokenExpirationSeconds: 3607
ConfigMapName: kube-root-ca.crt
ConfigMapOptional:
DownwardAPI: true
QoS Class: BestEffort
Node-Selectors:
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
---- ------ ---- ---- -------
Warning LoggingDisabled 2m13s fargate-scheduler Disabled logging because aws-logging configmap was not found. configmap "aws-logging" not found
Normal Scheduled 89s fargate-scheduler Successfully assigned my-eks-namespace/my-keyspaces-app-6c56fccc56-mgs2m to fargate-ip-192-168-102-209.ec2.internal
Normal Pulled 75s kubelet Successfully pulled image "111122223333.dkr.ecr.us-east-1.amazonaws.com/my_eks_repository:latest" in 13.027s (13.027s including waiting)
Normal Pulling 54s (x2 over 88s) kubelet Pulling image "111122223333.dkr.ecr.us-east-1.amazonaws.com/my_eks_repository:latest"
Normal Created 54s (x2 over 75s) kubelet Created container my-keyspaces-app
Normal Pulled 54s kubelet Successfully pulled image "111122223333.dkr.ecr.us-east-1.amazonaws.com/my_eks_repository:latest" in 222ms (222ms including waiting)
Normal Started 53s (x2 over 75s) kubelet Started container my-keyspaces-app
```
1. 檢查 Pod 的日誌，以確認您的應用程式正在執行，並可以連線至您的 Amazon Keyspaces 資料表。您可以使用下列命令來執行此操作。請務必取代部署的名稱。
```
kubectl logs -f my-keyspaces-app-123abcde4f-g5hij -n my-eks-namespace
```
您應該能夠看到應用程式日誌項目，確認與 Amazon Keyspaces 的連線，如以下範例所示。
```
2:47:20.553 [s0-admin-0] DEBUG c.d.o.d.i.c.metadata.MetadataManager - [s0] Adding initial contact points [Node(endPoint=cassandra.us-east-1.amazonaws.com/1.222.333.44:9142, hostId=null, hashCode=e750d92)]
22:47:20.562 [s0-admin-1] DEBUG c.d.o.d.i.c.c.ControlConnection - [s0] Initializing with event types [SCHEMA_CHANGE, STATUS_CHANGE, TOPOLOGY_CHANGE]
22:47:20.564 [s0-admin-1] DEBUG c.d.o.d.i.core.context.EventBus - [s0] Registering com.datastax.oss.driver.internal.core.metadata.LoadBalancingPolicyWrapper$$Lambda$812/0x0000000801105e88@769afb95 for class com.datastax.oss.driver.internal.core.metadata.NodeStateEvent
22:47:20.566 [s0-admin-1] DEBUG c.d.o.d.i.c.c.ControlConnection - [s0] Trying to establish a connection to Node(endPoint=cassandra.us-east-1.amazonaws.com/1.222.333.44:9142, hostId=null, hashCode=e750d92)
```
1. 在 Amazon Keyspaces 資料表上執行下列 CQL 查詢，以確認已將一列資料寫入資料表：
```
SELECT * from aws.user;
```
您應該會看到下列輸出：
```
fname | lname | username | last_update_date
----------+-------+----------+-----------------------------
random | k | test | 2023-12-07 13:58:31.57+0000
```