如何让Terraform继续执行，并在应用Terraform时忽略资源创建的错误

Question

我在terraform中使用null_resource安装CNI。现在，如果CNI已经安装，地形脚本将失败并出现错误：exit status 254. Output: │ An error occurred (ResourceInUseException) when calling the CreateAddon │ operation: Addon already exists.如果CNI已经安装，而不是失败，我如何让terraform继续执行。

以下是我安装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，如果有其他内容，则返回错误，可能是aws cli权限或错误命令。

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
}
}