<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Kt Cloud on Joonlog</title><link>https://joonlog.github.io/tags/kt-cloud/</link><description>Recent content in Kt Cloud on Joonlog</description><generator>Hugo -- gohugo.io</generator><language>ko-kr</language><lastBuildDate>Fri, 26 Dec 2025 09:00:00 +0900</lastBuildDate><atom:link href="https://joonlog.github.io/tags/kt-cloud/index.xml" rel="self" type="application/rss+xml"/><item><title>KT Cloud에서 루트 디스크 증설하는 방법</title><link>https://joonlog.github.io/p/kt-cloud%EC%97%90%EC%84%9C-%EB%A3%A8%ED%8A%B8-%EB%94%94%EC%8A%A4%ED%81%AC-%EC%A6%9D%EC%84%A4%ED%95%98%EB%8A%94-%EB%B0%A9%EB%B2%95/</link><pubDate>Fri, 26 Dec 2025 09:00:00 +0900</pubDate><guid>https://joonlog.github.io/p/kt-cloud%EC%97%90%EC%84%9C-%EB%A3%A8%ED%8A%B8-%EB%94%94%EC%8A%A4%ED%81%AC-%EC%A6%9D%EC%84%A4%ED%95%98%EB%8A%94-%EB%B0%A9%EB%B2%95/</guid><description>&lt;blockquote&gt;
&lt;p&gt;KT Cloud에서의 루트 디스크 증설 방법&lt;/p&gt;
&lt;/blockquote&gt;
&lt;h3 id="kt-cloud-루트-디스크-증설-정책"&gt;KT Cloud 루트 디스크 증설 정책
&lt;/h3&gt;&lt;p&gt;root 디스크:&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;linux: 20GB
&lt;ul&gt;
&lt;li&gt;50GB, 80GB, 100GB로만 증설 가능
&lt;ul&gt;
&lt;li&gt;증설 이후 감설 불가능&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;li&gt;사용 중이던 서버라면 Resize 수행 전 VM 스냅샷, 이미지 필요&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;li&gt;windows 50GB&lt;/li&gt;
&lt;/ul&gt;
&lt;h2 id="루트-디스크-증설-방법"&gt;루트 디스크 증설 방법
&lt;/h2&gt;&lt;p&gt;루트 디스크 증설 위해 추가 작업 필요&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;&lt;a class="link" href="https://manual.cloud.kt.com/kt/compute-server-disk" target="_blank" rel="noopener"
&gt;https://manual.cloud.kt.com/kt/compute-server-disk&lt;/a&gt;&lt;/li&gt;
&lt;li&gt;서버 정지 후 디스크 사이즈 변경 필요&lt;/li&gt;
&lt;/ul&gt;
&lt;h3 id="lvm-환경경에서의-루트-디스크-증설"&gt;LVM 환경경에서의 루트 디스크 증설
&lt;/h3&gt;&lt;p&gt;&lt;img src="https://joonlog.github.io/p/kt-cloud%EC%97%90%EC%84%9C-%EB%A3%A8%ED%8A%B8-%EB%94%94%EC%8A%A4%ED%81%AC-%EC%A6%9D%EC%84%A4%ED%95%98%EB%8A%94-%EB%B0%A9%EB%B2%95/KTRootExpand01.png"
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&gt;&lt;/p&gt;
&lt;div class="highlight"&gt;&lt;div class="chroma"&gt;
&lt;table class="lntable"&gt;&lt;tr&gt;&lt;td class="lntd"&gt;
&lt;pre tabindex="0" class="chroma"&gt;&lt;code&gt;&lt;span class="lnt"&gt; 1
&lt;/span&gt;&lt;span class="lnt"&gt; 2
&lt;/span&gt;&lt;span class="lnt"&gt; 3
&lt;/span&gt;&lt;span class="lnt"&gt; 4
&lt;/span&gt;&lt;span class="lnt"&gt; 5
&lt;/span&gt;&lt;span class="lnt"&gt; 6
&lt;/span&gt;&lt;span class="lnt"&gt; 7
&lt;/span&gt;&lt;span class="lnt"&gt; 8
&lt;/span&gt;&lt;span class="lnt"&gt; 9
&lt;/span&gt;&lt;span class="lnt"&gt;10
&lt;/span&gt;&lt;span class="lnt"&gt;11
&lt;/span&gt;&lt;span class="lnt"&gt;12
&lt;/span&gt;&lt;span class="lnt"&gt;13
&lt;/span&gt;&lt;span class="lnt"&gt;14
&lt;/span&gt;&lt;span class="lnt"&gt;15
&lt;/span&gt;&lt;/code&gt;&lt;/pre&gt;&lt;/td&gt;
&lt;td class="lntd"&gt;
&lt;pre tabindex="0" class="chroma"&gt;&lt;code class="language-bash" data-lang="bash"&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt;lsblk
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt;fdisk -l
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt;&lt;span class="c1"&gt;# 파티션 삭제 및 생성 및 LVM으로 코드 변경&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt;fdisk /dev/xvda
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt; p d &lt;span class="m"&gt;2&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt; n p &lt;span class="m"&gt;2&lt;/span&gt; p
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt; t &lt;span class="m"&gt;2&lt;/span&gt; 8e
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt; w
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt;lsblk
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt;pvresize /dev/xvda2
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt;lvdisplay
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt;lvreize -l +20480 /dev/centos/root
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt;lvdisplay
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt;xfs_growfs&lt;span class="o"&gt;(&lt;/span&gt;resize2fs&lt;span class="o"&gt;)&lt;/span&gt; /dev/mapper/centos-root
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt;df -TH
&lt;/span&gt;&lt;/span&gt;&lt;/code&gt;&lt;/pre&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;
&lt;/div&gt;
&lt;/div&gt;&lt;h3 id="non-lvm-환경경에서의-루트-디스크-증설"&gt;NON-LVM 환경경에서의 루트 디스크 증설
&lt;/h3&gt;&lt;p&gt;&lt;img src="https://joonlog.github.io/p/kt-cloud%EC%97%90%EC%84%9C-%EB%A3%A8%ED%8A%B8-%EB%94%94%EC%8A%A4%ED%81%AC-%EC%A6%9D%EC%84%A4%ED%95%98%EB%8A%94-%EB%B0%A9%EB%B2%95/KTRootExpand02.png"
width="467"
height="227"
srcset="https://joonlog.github.io/p/kt-cloud%EC%97%90%EC%84%9C-%EB%A3%A8%ED%8A%B8-%EB%94%94%EC%8A%A4%ED%81%AC-%EC%A6%9D%EC%84%A4%ED%95%98%EB%8A%94-%EB%B0%A9%EB%B2%95/KTRootExpand02_hu_91c063ee088153fa.png 480w, https://joonlog.github.io/p/kt-cloud%EC%97%90%EC%84%9C-%EB%A3%A8%ED%8A%B8-%EB%94%94%EC%8A%A4%ED%81%AC-%EC%A6%9D%EC%84%A4%ED%95%98%EB%8A%94-%EB%B0%A9%EB%B2%95/KTRootExpand02_hu_b953772439ce6c79.png 1024w"
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&gt;&lt;/p&gt;
&lt;div class="highlight"&gt;&lt;div class="chroma"&gt;
&lt;table class="lntable"&gt;&lt;tr&gt;&lt;td class="lntd"&gt;
&lt;pre tabindex="0" class="chroma"&gt;&lt;code&gt;&lt;span class="lnt"&gt; 1
&lt;/span&gt;&lt;span class="lnt"&gt; 2
&lt;/span&gt;&lt;span class="lnt"&gt; 3
&lt;/span&gt;&lt;span class="lnt"&gt; 4
&lt;/span&gt;&lt;span class="lnt"&gt; 5
&lt;/span&gt;&lt;span class="lnt"&gt; 6
&lt;/span&gt;&lt;span class="lnt"&gt; 7
&lt;/span&gt;&lt;span class="lnt"&gt; 8
&lt;/span&gt;&lt;span class="lnt"&gt; 9
&lt;/span&gt;&lt;span class="lnt"&gt;10
&lt;/span&gt;&lt;span class="lnt"&gt;11
&lt;/span&gt;&lt;span class="lnt"&gt;12
&lt;/span&gt;&lt;span class="lnt"&gt;13
&lt;/span&gt;&lt;span class="lnt"&gt;14
&lt;/span&gt;&lt;span class="lnt"&gt;15
&lt;/span&gt;&lt;span class="lnt"&gt;16
&lt;/span&gt;&lt;span class="lnt"&gt;17
&lt;/span&gt;&lt;span class="lnt"&gt;18
&lt;/span&gt;&lt;/code&gt;&lt;/pre&gt;&lt;/td&gt;
&lt;td class="lntd"&gt;
&lt;pre tabindex="0" class="chroma"&gt;&lt;code class="language-bash" data-lang="bash"&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt;lsblk
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt;fdisk -l
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt;fdisk /dev/xvda
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt; p d &lt;span class="m"&gt;3&lt;/span&gt; d &lt;span class="m"&gt;2&lt;/span&gt; p
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt;&lt;span class="c1"&gt;# 파티션 생성&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt;fdisk /dev/xvda
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt; n p &lt;span class="m"&gt;2&lt;/span&gt; +97G n p &lt;span class="m"&gt;3&lt;/span&gt; p w
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt;&lt;span class="c1"&gt;# swap 설정&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt;fdisk /dev/xvda
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt; t &lt;span class="m"&gt;3&lt;/span&gt; &lt;span class="m"&gt;82&lt;/span&gt; p w
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt;재기동
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt;resize2fs /dev/xvda2
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt;lsblk
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt;mkswap /dev/xvda3
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt;swapon /dev/xvda3
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt;&lt;span class="c1"&gt;# UUID 추가&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class="line"&gt;&lt;span class="cl"&gt;&lt;span class="nb"&gt;echo&lt;/span&gt; &lt;span class="s2"&gt;&amp;#34;UUID=&amp;lt;UUID&amp;gt; swap swap defaults 0 0&amp;#34;&lt;/span&gt; &amp;gt;&amp;gt; /etc/fstab
&lt;/span&gt;&lt;/span&gt;&lt;/code&gt;&lt;/pre&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;
&lt;/div&gt;
&lt;/div&gt;</description></item><item><title>KT Cloud Zone 구조</title><link>https://joonlog.github.io/p/kt-cloud-zone-%EA%B5%AC%EC%A1%B0/</link><pubDate>Fri, 23 May 2025 09:00:00 +0900</pubDate><guid>https://joonlog.github.io/p/kt-cloud-zone-%EA%B5%AC%EC%A1%B0/</guid><description>&lt;ul&gt;
&lt;li&gt;KT Cloud는 Zone 별로 구조가 상이하니 Zone 간 차이에 대해 이해가 필요하다.&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;&lt;img src="https://joonlog.github.io/p/kt-cloud-zone-%EA%B5%AC%EC%A1%B0/KTCloudZone1.webp"
width="1659"
height="902"
srcset="https://joonlog.github.io/p/kt-cloud-zone-%EA%B5%AC%EC%A1%B0/KTCloudZone1_hu_59d2f6f19d20939d.webp 480w, https://joonlog.github.io/p/kt-cloud-zone-%EA%B5%AC%EC%A1%B0/KTCloudZone1_hu_d9d83c58a3a05b5e.webp 1024w"
loading="lazy"
alt="KTCloudZone1.webp"
class="gallery-image"
data-flex-grow="183"
data-flex-basis="441px"
&gt;&lt;/p&gt;
&lt;h3 id="g1g2a-b-m1cloudstack"&gt;G1/G2(A, B, M1)(Cloudstack)
&lt;/h3&gt;&lt;p&gt;&lt;img src="https://joonlog.github.io/p/kt-cloud-zone-%EA%B5%AC%EC%A1%B0/KTCloudZone2.webp"
width="1053"
height="1449"
srcset="https://joonlog.github.io/p/kt-cloud-zone-%EA%B5%AC%EC%A1%B0/KTCloudZone2_hu_27d110291782220c.webp 480w, https://joonlog.github.io/p/kt-cloud-zone-%EA%B5%AC%EC%A1%B0/KTCloudZone2_hu_36a87cb30c044d37.webp 1024w"
loading="lazy"
alt="KTCloudZone2.webp"
class="gallery-image"
data-flex-grow="72"
data-flex-basis="174px"
&gt;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;G1 존의 경우 VR 밑에서 서버가 생성된다. 이에 Subnet(tier)을 나눠서 구성이 불가하다.&lt;/li&gt;
&lt;li&gt;VR에서 방화벽의 역할을 해주나 블랙리스트가 아닌 화이트 리스트만 적용이되어 보안적으로 취약하다.&lt;/li&gt;
&lt;li&gt;NAS 연결시 NAS용 네트워크에 NAS가 생성되어 CIP를 통해 통신이 된다. 이에 CIP 대역을 서버에 붙여줘야된다.&lt;/li&gt;
&lt;li&gt;기본 디스크가 HDD이다. SSD는 SSD 서버 상품 구성을 해야한다.&lt;/li&gt;
&lt;li&gt;KT Load Balancer는 VR 상단에 위치하게 된다. (Server를 LB로 구성한 것이다.) LB도 NAS처럼 존이 따로 존재한다.&lt;/li&gt;
&lt;/ul&gt;
&lt;h3 id="vr"&gt;VR
&lt;/h3&gt;&lt;ul&gt;
&lt;li&gt;방화벽 : 공격이 서버에 도달하지 않게 막아주는 역할을 한다. 다만 화이트 리스트 적용으로서의 역할만 한다.&lt;/li&gt;
&lt;li&gt;Port forwarding : G1존은 VR에 할당 된 기본 공인 IP를 통해 모든 서버들이 통신한다. 이에 VR에서 서버를 구분하여 서비스 할 수 있게 포트 포워딩을 해준다.&lt;/li&gt;
&lt;li&gt;서버 생성/ 삭제 : 서버 생성/삭제에 관여한다. 이에 서버 비밀번호, IP도 부여한다.&lt;/li&gt;
&lt;li&gt;VR에서 다양한 역할을 하지만 서버이기에 서버에서 발생하는 문제(DISK full, CPU 등) 되면 모든 자원에 문제가 생기게 된다는 단점이 있다&lt;/li&gt;
&lt;li&gt;또한 VR의 경우 대역폭이 정해져 있어 과도한 서비스 사용시 VR에 부하가 발생하여 서비스에 문제가 될 수 있다.
&lt;ul&gt;
&lt;li&gt;이에 고급형 VR을 판다. 한 개의 서버에 KT 만의 프로그램인 router 기능을 넣어 사용자에게 제공한다. Master-Slave 구성으로 생성된다.&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;h3 id="g1g-cloud-ent-cloudcloudstack"&gt;G1(G-cloud, Ent-cloud)(Cloudstack)
&lt;/h3&gt;&lt;p&gt;&lt;img src="https://joonlog.github.io/p/kt-cloud-zone-%EA%B5%AC%EC%A1%B0/KTCloudZone3.webp"
width="1280"
height="1218"
srcset="https://joonlog.github.io/p/kt-cloud-zone-%EA%B5%AC%EC%A1%B0/KTCloudZone3_hu_3c31b30f2a1e05e4.webp 480w, https://joonlog.github.io/p/kt-cloud-zone-%EA%B5%AC%EC%A1%B0/KTCloudZone3_hu_affe6b4828533612.webp 1024w"
loading="lazy"
alt="KTCloudZone3.webp"
class="gallery-image"
data-flex-grow="105"
data-flex-basis="252px"
&gt;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;DMZ/Private zone으로 물리적으로 분리되어 있음
&lt;ul&gt;
&lt;li&gt;Subnet(tier) 생성 불가능&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;li&gt;DMZ zone와 Private zone간에는 DMZ F/W 과 Private F/W 에 의해 차단되며 방화벽 설정을 통해 연동&lt;/li&gt;
&lt;li&gt;DMZ zone에는 Web, Private zone에는 WAS 및 DB 등 배치&lt;/li&gt;
&lt;li&gt;웹서비스를 이용하는 최종 사용자는 DMZ F/W - IPS - DMZ LB (옵션) - VR - VM 의 경로로 접근&lt;/li&gt;
&lt;/ul&gt;
&lt;h3 id="g2m2-eenterprise-securitycloudstack"&gt;&lt;strong&gt;G2(M2, Eenterprise Security)&lt;/strong&gt;(Cloudstack)
&lt;/h3&gt;&lt;p&gt;&lt;a class="link" href="https://manual.cloud.kt.com/kt/enterprise-security-intro" target="_blank" rel="noopener"
&gt;https://manual.cloud.kt.com/kt/enterprise-security-intro&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;img src="https://joonlog.github.io/p/kt-cloud-zone-%EA%B5%AC%EC%A1%B0/KTCloudZone4.webp"
width="1280"
height="1196"
srcset="https://joonlog.github.io/p/kt-cloud-zone-%EA%B5%AC%EC%A1%B0/KTCloudZone4_hu_cff79d2856a10261.webp 480w, https://joonlog.github.io/p/kt-cloud-zone-%EA%B5%AC%EC%A1%B0/KTCloudZone4_hu_3ace853f5cf69b8b.webp 1024w"
loading="lazy"
alt="KTCloudZone4.webp"
class="gallery-image"
data-flex-grow="107"
data-flex-basis="256px"
&gt;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;DMZ/Private zone을 최대 13개 티어로 구성 가능&lt;/li&gt;
&lt;/ul&gt;
&lt;h3 id="dxdx-m1-dx-central-dx-gopenstack"&gt;&lt;strong&gt;Dx(Dx-M1, Dx-central,&lt;/strong&gt; Dx-G**)**(OpenStack)
&lt;/h3&gt;&lt;p&gt;&lt;img src="https://joonlog.github.io/p/kt-cloud-zone-%EA%B5%AC%EC%A1%B0/KTCloudZone5.webp"
width="550"
height="426"
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&gt;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;scale up, scale out 지원&lt;/li&gt;
&lt;li&gt;월 추가 비용 필요(30?)&lt;/li&gt;
&lt;li&gt;DMZ/Private zone으로 분리&lt;/li&gt;
&lt;li&gt;VR 대신 VDOM을 사용하여 여러 Tier을 관리
&lt;ul&gt;
&lt;li&gt;multi-tenant로 논리적 방화벽 분리 적용&lt;/li&gt;
&lt;li&gt;내부적으로 서로 다른 Tier라도 CIP로 통신하는 것이 아닌 vdom으로 통신 가능&lt;/li&gt;
&lt;li&gt;화이트 리스트, 블랙 리스트를 선택 가능&lt;/li&gt;
&lt;li&gt;Tier 분리를 했기에 NAS를 다른 Tier와 공유 가능&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;li&gt;각 티어와 외부 연동에는 각각의 Firewall이 존재 ( DMZ F/W, Private F/W, 외부 F/W )
&lt;ul&gt;
&lt;li&gt;최종 사용자는 DMZ F/W &amp;gt; IPS &amp;gt; (DMZ LB) &amp;gt; VDOM &amp;gt; VM으로 접근&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;</description></item></channel></rss>