如何使Terraform继续执行，并在terraform应用期间忽略资源创建中的错误？

Question

我正在用null_resource在地形上安装CNI。现在，如果CNI已经安装，那么terraform脚本就会出现错误：exit status 254. Output: │ An error occurred (ResourceInUseException) when calling the CreateAddon │ operation: Addon already exists.，如果CNI已经安装，如何使terraform继续执行，而不是失败。

下面是我安装CNI的配置：

### Installing CNI Addon ###
resource "null_resource" "install-CNI" {
  provisioner "local-exec" {
    when = create
    interpreter = ["bash", "-c"]
    command = <<EOT
        aws eks create-addon  \
            --cluster-name ${data.aws_eks_cluster.Custom_Dev-cluster-deploy.name} \
            --addon-name vpc-cni \
            --addon-version v1.11.2-eksbuild.1 \
            --service-account-role-arn ${aws_iam_role.Custom_Dev-cluster.arn} \
            --resolve-conflicts OVERWRITE
    EOT
  }
  triggers = {
    "before" = null_resource.eks-config-file.id
  }
}

Answer 1

您可以根据响应处理错误。如果命令响应包含Addon already exists，则可以exit 0并返回错误(如果发生其他事情)，则可能是aws cli权限，也可能是错误命令。

resource "null_resource" "install-CNI" {
  provisioner "local-exec" {
    when = create
    interpreter = ["bash", "-c"]
    command = <<EOT
        RESULT=$(aws eks create-addon --cluster-name ${data.aws_eks_cluster.Custom_Dev-cluster-deploy.name} --addon-name vpc-cni --addon-version v1.11.2-eksbuild.1 --service-account-role-arn ${aws_iam_role.Custom_Dev-cluster.arn} --resolve-conflicts OVERWRITE 2>&1)
        if [ $? -eq 0 ]
        then
        echo "Addon installed successfully $RESULT"
        exit 0
        elif [[ "$RESULT" =~ .*"Addon already exists".* ]] 
        then
        echo "Plugin already exists $RESULT" >&2
        exit 0
        else 
        echo "Encounter error $RESULT" >&2
        exit 1
        fi
    EOT
    
  }
  triggers = {
    "before" = null_resource.eks-config-file.id
  }
}