Definition of Operator in English: "An operator, in computer programing, is a symbol that usually represents an action or process. These symbols were adapted from mathematics and logic. An operator is capable of manipulating a certain value or operand. Operators are the backbone of any program and they are used for everything from very simple functions like counting to complex algorithms like security encryption" (https://www.techopedia.com/definition/3485/operator-programm...

Definition of Operator in Chinese: “编程语言中的运算符是一种符号，它告诉编译器或解释器执行特定的数学，关系或逻辑运算并产生最终结果” )(https://iowiki.com/computer_programming/computer_programming...

Example:
1. "本章将解释operators的概念，它将指导您完成C，Java和Python中可用的重要算术和关系运算符" (https://iowiki.com/computer_programming/computer_programming...

2. "如何理解编程语言中「操作符」（operator）的概念？
一直以来理解的operator无非算术运算符、逻辑运算符、位运算等等，但是在C++中，new、new[]、delete、delete[]、 typeid、static_cast等都是operator。直观上来看感觉这些更像函数（operator overload的时候就是重新定义函数），那么operator和函数又有哪些不同呢？" (https://www.zhihu.com/question/34670236).

Definition of Container Operator:

“Operator for PMEM-CSI driver:
Intel PMEM-CSI is a CSI storage driver for container orchestrators like Kubernetes. It makes local persistent memory (PMEM) available as a filesystem volume to container applications. This is the operator to deploy and manage the PMEM-CSI driver on a Kubernetes cluster." (https://operatorhub.io/operator/pmem-csi-operator)/.

Interesting enough, this definition is partly translated and quoted in a Chinese article “金融企业容器云建设中资源智能优化实践分享”:

”英特尔®傲腾™持久内存CSI是一个CSI存储驱动程序，用于像Kubernetes这样的容器编排器。 它可以将本地持久内存(PMEM)作为文件系统卷提供给容器应用程序，并且支持LVM和直接访问模式。“（https://www.talkwithtrend.com/Article/260045）

Based on the research above, I believe “container operator” can be translated as “容器运算符” or “容器编排器”.

My two cents only.

Operators are software extensions to Kubernetes that make use of custom resources to manage applications and their components. Operators follow Kubernetes principles, notably the control loop.

The Operator pattern aims to capture the key aim of a human operator who is managing a service or set of services. Human operators who look after specific applications and services have deep knowledge of how the system ought to behave, how to deploy it, and how to react if there are problems.

https://kubernetes.io/docs/concepts/extend-kubernetes/operat...

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Note added at 17 hrs (2022-02-06 19:09:15 GMT)
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Operator(操作器) 的目的是要来代替 a human operator(操作员)。