第 1 章 备份应用程序

流程

1. 运行以下命令来创建以下环境变量：

   注意

   更改集群名称来匹配您的 ROSA 集群，并确保以管理员身份登录到集群。在继续操作前，确保所有字段被正常输出。

   $ export CLUSTER_NAME=my-cluster 1
   export ROSA_CLUSTER_ID=$(rosa describe cluster -c ${CLUSTER_NAME} --output json | jq -r .id)
   export REGION=$(rosa describe cluster -c ${CLUSTER_NAME} --output json | jq -r .region.id)
   export OIDC_ENDPOINT=$(oc get authentication.config.openshift.io cluster -o jsonpath='{.spec.serviceAccountIssuer}' | sed 's|^https://||')
   export AWS_ACCOUNT_ID=$(aws sts get-caller-identity --query Account --output text)
   export CLUSTER_VERSION=$(rosa describe cluster -c ${CLUSTER_NAME} -o json | jq -r .version.raw_id | cut -f -2 -d '.')
   export ROLE_NAME="${CLUSTER_NAME}-openshift-oadp-aws-cloud-credentials"
   export SCRATCH="/tmp/${CLUSTER_NAME}/oadp"
   mkdir -p ${SCRATCH}
   echo "Cluster ID: ${ROSA_CLUSTER_ID}, Region: ${REGION}, OIDC Endpoint:
   ${OIDC_ENDPOINT}, AWS Account ID: ${AWS_ACCOUNT_ID}"

   1

   将 my-cluster 替换为您的 ROSA 集群名称。

2. 在 AWS 帐户上，创建一个 IAM 策略以允许访问 S3。

   1. 运行以下命令，检查策略是否存在：

      $ POLICY_ARN=$(aws iam list-policies --query "Policies[?PolicyName=='RosaOadpVer1'].{ARN:Arn}" --output text) 1

      1

      将 RosaOadp 替换为您的策略名称。

   2. 使用以下命令来创建策略 JSON 文件，然后在 ROSA 中创建策略。

      注意

      如果没有找到策略 ARN，该命令将创建策略。如果策略 ARN 已存在，则 if 语句将跳过策略创建。

      $ if [[ -z "${POLICY_ARN}" ]]; then
      cat << EOF > ${SCRATCH}/policy.json 1
      {
      "Version": "2012-10-17",
      "Statement": [
        {
          "Effect": "Allow",
          "Action": [
            "s3:CreateBucket",
            "s3:DeleteBucket",
            "s3:PutBucketTagging",
            "s3:GetBucketTagging",
            "s3:PutEncryptionConfiguration",
            "s3:GetEncryptionConfiguration",
            "s3:PutLifecycleConfiguration",
            "s3:GetLifecycleConfiguration",
            "s3:GetBucketLocation",
            "s3:ListBucket",
            "s3:GetObject",
            "s3:PutObject",
            "s3:DeleteObject",
            "s3:ListBucketMultipartUploads",
            "s3:AbortMultipartUpload",
            "s3:ListMultipartUploadParts",
            "ec2:DescribeSnapshots",
            "ec2:DescribeVolumes",
            "ec2:DescribeVolumeAttribute",
            "ec2:DescribeVolumesModifications",
            "ec2:DescribeVolumeStatus",
            "ec2:CreateTags",
            "ec2:CreateVolume",
            "ec2:CreateSnapshot",
            "ec2:DeleteSnapshot"
          ],
          "Resource": "*"
        }
       ]}
      EOF
      
      POLICY_ARN=$(aws iam create-policy --policy-name "RosaOadpVer1" \
      --policy-document file:///${SCRATCH}/policy.json --query Policy.Arn \
      --tags Key=rosa_openshift_version,Value=${CLUSTER_VERSION} Key=rosa_role_prefix,Value=ManagedOpenShift Key=operator_namespace,Value=openshift-oadp Key=operator_name,Value=openshift-oadp \
      --output text)
      fi

      1

      SCRATCH 是为环境变量创建的临时目录的名称。

   3. 运行以下命令来查看策略 ARN：

      $ echo ${POLICY_ARN}

3. 为集群创建 IAM 角色信任策略：

   1. 运行以下命令来创建信任策略文件：

      $ cat <<EOF > ${SCRATCH}/trust-policy.json
      {
          "Version": "2012-10-17",
          "Statement": [{
            "Effect": "Allow",
            "Principal": {
              "Federated": "arn:aws:iam::${AWS_ACCOUNT_ID}:oidc-provider/${OIDC_ENDPOINT}"
            },
            "Action": "sts:AssumeRoleWithWebIdentity",
            "Condition": {
              "StringEquals": {
                "${OIDC_ENDPOINT}:sub": [
                  "system:serviceaccount:openshift-adp:openshift-adp-controller-manager",
                  "system:serviceaccount:openshift-adp:velero"]
              }
            }
          }]
      }
      EOF

   2. 运行以下命令来创建角色：

      $ ROLE_ARN=$(aws iam create-role --role-name \
        "${ROLE_NAME}" \
        --assume-role-policy-document file://${SCRATCH}/trust-policy.json \
        --tags Key=rosa_cluster_id,Value=${ROSA_CLUSTER_ID}
      Key=rosa_openshift_version,Value=${CLUSTER_VERSION}
      Key=rosa_role_prefix,Value=ManagedOpenShift
      Key=operator_namespace,Value=openshift-adp
      Key=operator_name,Value=openshift-oadp \
         --query Role.Arn --output text)

   3. 运行以下命令来查看角色 ARN：

      $ echo ${ROLE_ARN}

4. 运行以下命令，将 IAM 策略附加到 IAM 角色：

   $ aws iam attach-role-policy --role-name "${ROLE_NAME}" \
     --policy-arn ${POLICY_ARN}