1.2. 启用可观察性服务

设置 AWS 环境。运行以下命令：

export POLICY_VERSION=$(date +"%m-%d-%y")
export TRUST_POLICY_VERSION=$(date +"%m-%d-%y")
export CLUSTER_NAME=<my-cluster>
export S3_BUCKET=$CLUSTER_NAME-acm-observability
export REGION=us-east-2
export NAMESPACE=open-cluster-management-observability
export SA=tbd
export SCRATCH_DIR=/tmp/scratch
export OIDC_PROVIDER=$(oc get authentication.config.openshift.io cluster -o json | jq -r .spec.serviceAccountIssuer| sed -e "s/^https:\/\///")
export AWS_ACCOUNT_ID=$(aws sts get-caller-identity --query Account --output text)
export AWS_PAGER=""
rm -rf $SCRATCH_DIR
mkdir -p $SCRATCH_DIR

使用以下命令创建 S3 存储桶：

aws s3 mb s3://$S3_BUCKET

创建一个 s3-policy JSON 文件来访问 S3 存储桶。运行以下命令:

{
    "Version": "$POLICY_VERSION",
    "Statement": [
        {
            "Sid": "Statement",
            "Effect": "Allow",
            "Action": [
                "s3:ListBucket",
                "s3:GetObject",
                "s3:DeleteObject",
                "s3:PutObject",
                "s3:PutObjectAcl",
                "s3:CreateBucket",
                "s3:DeleteBucket"
            ],
            "Resource": [
                "arn:aws:s3:::$S3_BUCKET/*",
                "arn:aws:s3:::$S3_BUCKET"
            ]
        }
    ]
 }

使用以下命令应用策略：

S3_POLICY=$(aws iam create-policy --policy-name $CLUSTER_NAME-acm-obs \
--policy-document file://$SCRATCH_DIR/s3-policy.json \
--query 'Policy.Arn' --output text)
echo $S3_POLICY

创建 TrustPolicy JSON 文件。运行以下命令:

{
 "Version": "$TRUST_POLICY_VERSION",
 "Statement": [
   {
     "Effect": "Allow",
     "Principal": {
       "Federated": "arn:aws:iam::${AWS_ACCOUNT_ID}:oidc-provider/${OIDC_PROVIDER}"
     },
     "Action": "sts:AssumeRoleWithWebIdentity",
     "Condition": {
       "StringEquals": {
         "${OIDC_PROVIDER}:sub": [
           "system:serviceaccount:${NAMESPACE}:observability-thanos-query",
           "system:serviceaccount:${NAMESPACE}:observability-thanos-store-shard",
           "system:serviceaccount:${NAMESPACE}:observability-thanos-compact"
           "system:serviceaccount:${NAMESPACE}:observability-thanos-rule",
           "system:serviceaccount:${NAMESPACE}:observability-thanos-receive",
         ]
       }
     }
   }
 ]
}

使用以下命令，为 AWS Prometheus 和 CloudWatch 创建角色：

S3_ROLE=$(aws iam create-role \
  --role-name "$CLUSTER_NAME-acm-obs-s3" \
  --assume-role-policy-document file://$SCRATCH_DIR/TrustPolicy.json \
  --query "Role.Arn" --output text)
echo $S3_ROLE

将策略附加到角色。运行以下命令:

aws iam attach-role-policy \
  --role-name "$CLUSTER_NAME-acm-obs-s3" \
  --policy-arn $S3_POLICY

您的 secret 可能类似以下文件：config 部分指定 signature_version2: false，且不指定 access_key 和 secret_key ：

apiVersion: v1
kind: Secret
metadata:
  name: thanos-object-storage
  namespace: open-cluster-management-observability
type: Opaque
stringData:
  thanos.yaml: |
 type: s3
 config:
   bucket: $S3_BUCKET
   endpoint: s3.$REGION.amazonaws.com
   signature_version2: false

您可以使用以下命令为云供应商检索 S3 access key 和 secret 密钥：您必须在 secret 中对 base64 字符串进行解码、编辑和编码：

YOUR_CLOUD_PROVIDER_ACCESS_KEY=$(oc -n open-cluster-management-observability get secret <object-storage-secret> -o jsonpath="{.data.thanos\.yaml}" | base64 --decode | grep access_key | awk '{print $2}')

echo $ACCESS_KEY

YOUR_CLOUD_PROVIDER_SECRET_KEY=$(oc -n open-cluster-management-observability get secret <object-storage-secret> -o jsonpath="{.data.thanos\.yaml}" | base64 --decode | grep secret_key | awk '{print $2}')

echo $SECRET_KEY

通过检查以下部署和有状态集的 pod 来验证是否启用了可观察性。您可能会收到以下信息：

observability-thanos-query (deployment)
observability-thanos-compact (statefulset)
observability-thanos-receive-default  (statefulset)
observability-thanos-rule   (statefulset)
observability-thanos-store-shard-x  (statefulsets)