Ninth Korean l10n work for release 1.18

- Fix error in k8s.io/ko/docs/concepts/workloads/pods/pod-lifecycle/ (#22681)
- Translate docs/reference/setup-tools/kubeadm/kubeadm.md in Korean (#22684)
- Update outdated files in dev-1.18-ko.9 branch (#22686)
- Fix issues of ko-doc links in translated docs (#22718)
- Translate concepts/cluster-administration/monitoring.md into Korean (#22808)
- Translate tasks/access-application-cluster/service-access-application-cluster in Korean (#22800)
- Translate concepts/storage/storage-limits.md into Korean (#22795)

Co-authored-by: Jihoon Seo <jihoon.seo@etri.re.kr>
Co-authored-by: Reung37 <reung37@naver.com>
Co-authored-by: Seokho Son <shsongist@gmail.com>
Co-authored-by: Jerry Park <jaehwa@gmail.com>
Co-authored-by: coolguyhong <podolsmith@naver.com>

content/ko/case-studies/northwestern-mutual/index.html

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   <h1> CASE STUDY:<img src="/images/northwestern_logo.png" style="margin-bottom:-1%" class="header_logo"><br> <div class="subhead">Cloud Native at Northwestern Mutual
 
 
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     <h2>Challenge</h2>
-    In the spring of 2015, Northwestern Mutual acquired a fintech startup, LearnVest, and decided to take "Northwestern Mutual’s leading products and services and meld it with LearnVest’s digital experience and innovative financial planning platform," says Brad Williams, Director of Engineering for Client Experience, Northwestern Mutual. The company’s existing infrastructure had been optimized for batch workflows hosted on on-prem networks; deployments were very traditional, focused on following a process instead of providing deployment agility. "We had to build a platform that was elastically scalable, but also much more responsive, so we could quickly get data to the client website so our end-customers have the experience they expect," says Williams. 
+    In the spring of 2015, Northwestern Mutual acquired a fintech startup, LearnVest, and decided to take "Northwestern Mutual’s leading products and services and meld it with LearnVest’s digital experience and innovative financial planning platform," says Brad Williams, Director of Engineering for Client Experience, Northwestern Mutual. The company’s existing infrastructure had been optimized for batch workflows hosted on on-prem networks; deployments were very traditional, focused on following a process instead of providing deployment agility. "We had to build a platform that was elastically scalable, but also much more responsive, so we could quickly get data to the client website so our end-customers have the experience they expect," says Williams.
 <br>
     <h2>Solution</h2>
     The platform team came up with a plan for using the public cloud (AWS), Docker containers, and Kubernetes for orchestration. "Kubernetes gave us that base framework so teams can be very autonomous in what they’re building and deliver very quickly and frequently," says Northwestern Mutual Cloud Native Engineer Frank Greco Jr. The team also built and open-sourced <a href="https://github.com/northwesternmutual/kanali">Kanali</a>, a Kubernetes-native API management tool that uses OpenTracing, Jaeger, and gRPC.
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     "Kubernetes has definitely been the right choice for us. It gave us that base framework so teams can be autonomous in what they’re building and deliver very quickly and frequently."
 
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   Williams and the rest of the platform team decided that the first step would be to start moving from private data centers to AWS. With a new microservice architecture in mind—and the freedom to implement what was best for the organization—they began using Docker containers. After looking into the various container orchestration options, they went with Kubernetes, even though it was still in beta at the time. "There was some debate whether we should build something ourselves, or just leverage that product and evolve with it," says Northwestern Mutual Cloud Native Engineer Frank Greco Jr. "Kubernetes has definitely been the right choice for us. It gave us that base framework so teams can be autonomous in what they’re building and deliver very quickly and frequently."<br><br>
 As early adopters, the team had to do a lot of work with Ansible scripts to stand up the cluster. "We had a lot of hard security requirements given the nature of our business," explains Bryan Pfremmer, App Platform Teams Manager, Northwestern Mutual. "We found ourselves running a configuration that very few other people ever tried." The client experience group was the first to use the new platform; today, a few hundred of the company’s 1,500 engineers are using it and more are eager to get on board.
-The results have been dramatic. Before, infrastructure deployments could take two weeks; now, it is done in a matter of minutes. Now with a focus on Infrastructure automation, and self-service, "You can take an app to production in that same day if you want to," says Pfremmer. 
+The results have been dramatic. Before, infrastructure deployments could take two weeks; now, it is done in a matter of minutes. Now with a focus on Infrastructure automation, and self-service, "You can take an app to production in that same day if you want to," says Pfremmer.
 
 
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 "Now, developers have autonomy, they can use this whenever they want, however they want. It becomes more valuable the more instrumentation downstream that happens, as we mature in it."
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