https://joonlog.github.io/categories/server/Recent content in Server on JoonlogHugo -- gohugo.ioko-krFri, 26 Dec 2025 09:00:00 +0900https://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/Fri, 26 Dec 2025 09:00:00 +0900https://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/<blockquote> <p>KT Cloud에서의 루트 디스크 증설 방법</p> </blockquote> <h3 id="kt-cloud-루트-디스크-증설-정책">KT Cloud 루트 디스크 증설 정책 </h3><p>root 디스크:</p> <ul> <li>linux: 20GB <ul> <li>50GB, 80GB, 100GB로만 증설 가능 <ul> <li>증설 이후 감설 불가능</li> </ul> </li> <li>사용 중이던 서버라면 Resize 수행 전 VM 스냅샷, 이미지 필요</li> </ul> </li> <li>windows 50GB</li> </ul> <h2 id="루트-디스크-증설-방법">루트 디스크 증설 방법 </h2><p>루트 디스크 증설 위해 추가 작업 필요</p> <ul> <li><a class="link" href="https://manual.cloud.kt.com/kt/compute-server-disk" target="_blank" rel="noopener" >https://manual.cloud.kt.com/kt/compute-server-disk</a></li> <li>서버 정지 후 디스크 사이즈 변경 필요</li> </ul> <h3 id="lvm-환경경에서의-루트-디스크-증설">LVM 환경경에서의 루트 디스크 증설 </h3><p><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" width="649" height="311" 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/KTRootExpand01_hu_183e5786260b4ed0.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/KTRootExpand01_hu_1826e051438531c5.png 1024w" loading="lazy" alt="KTRootExpand01.png" class="gallery-image" data-flex-grow="208" data-flex-basis="500px" ></p> <div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt"> 1 </span><span class="lnt"> 2 </span><span class="lnt"> 3 </span><span class="lnt"> 4 </span><span class="lnt"> 5 </span><span class="lnt"> 6 </span><span class="lnt"> 7 </span><span class="lnt"> 8 </span><span class="lnt"> 9 </span><span class="lnt">10 </span><span class="lnt">11 </span><span class="lnt">12 </span><span class="lnt">13 </span><span class="lnt">14 </span><span class="lnt">15 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-bash" data-lang="bash"><span class="line"><span class="cl">lsblk </span></span><span class="line"><span class="cl">fdisk -l </span></span><span class="line"><span class="cl"><span class="c1"># 파티션 삭제 및 생성 및 LVM으로 코드 변경</span> </span></span><span class="line"><span class="cl">fdisk /dev/xvda </span></span><span class="line"><span class="cl"> p d <span class="m">2</span> </span></span><span class="line"><span class="cl"> n p <span class="m">2</span> p </span></span><span class="line"><span class="cl"> t <span class="m">2</span> 8e </span></span><span class="line"><span class="cl"> w </span></span><span class="line"><span class="cl">lsblk </span></span><span class="line"><span class="cl">pvresize /dev/xvda2 </span></span><span class="line"><span class="cl">lvdisplay </span></span><span class="line"><span class="cl">lvreize -l +20480 /dev/centos/root </span></span><span class="line"><span class="cl">lvdisplay </span></span><span class="line"><span class="cl">xfs_growfs<span class="o">(</span>resize2fs<span class="o">)</span> /dev/mapper/centos-root </span></span><span class="line"><span class="cl">df -TH </span></span></code></pre></td></tr></table> </div> </div><h3 id="non-lvm-환경경에서의-루트-디스크-증설">NON-LVM 환경경에서의 루트 디스크 증설 </h3><p><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" loading="lazy" alt="KTRootExpand02.png" class="gallery-image" data-flex-grow="205" data-flex-basis="493px" ></p> <div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt"> 1 </span><span class="lnt"> 2 </span><span class="lnt"> 3 </span><span class="lnt"> 4 </span><span class="lnt"> 5 </span><span class="lnt"> 6 </span><span class="lnt"> 7 </span><span class="lnt"> 8 </span><span class="lnt"> 9 </span><span class="lnt">10 </span><span class="lnt">11 </span><span class="lnt">12 </span><span class="lnt">13 </span><span class="lnt">14 </span><span class="lnt">15 </span><span class="lnt">16 </span><span class="lnt">17 </span><span class="lnt">18 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-bash" data-lang="bash"><span class="line"><span class="cl">lsblk </span></span><span class="line"><span class="cl">fdisk -l </span></span><span class="line"><span class="cl">fdisk /dev/xvda </span></span><span class="line"><span class="cl"> p d <span class="m">3</span> d <span class="m">2</span> p </span></span><span class="line"><span class="cl"><span class="c1"># 파티션 생성</span> </span></span><span class="line"><span class="cl">fdisk /dev/xvda </span></span><span class="line"><span class="cl"> n p <span class="m">2</span> +97G n p <span class="m">3</span> p w </span></span><span class="line"><span class="cl"><span class="c1"># swap 설정</span> </span></span><span class="line"><span class="cl">fdisk /dev/xvda </span></span><span class="line"><span class="cl"> t <span class="m">3</span> <span class="m">82</span> p w </span></span><span class="line"><span class="cl">재기동 </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl">resize2fs /dev/xvda2 </span></span><span class="line"><span class="cl">lsblk </span></span><span class="line"><span class="cl">mkswap /dev/xvda3 </span></span><span class="line"><span class="cl">swapon /dev/xvda3 </span></span><span class="line"><span class="cl"><span class="c1"># UUID 추가</span> </span></span><span class="line"><span class="cl"><span class="nb">echo</span> <span class="s2">&#34;UUID=&lt;UUID&gt; swap swap defaults 0 0&#34;</span> &gt;&gt; /etc/fstab </span></span></code></pre></td></tr></table> </div> </div>https://joonlog.github.io/p/ncp%EC%97%90%EC%84%9C-xen-%EA%B8%B0%EB%B0%98-rocky-linux-8-%EC%97%85%EB%8D%B0%EC%9D%B4%ED%8A%B8-%ED%9B%84-%EB%B6%80%ED%8C%85-%EC%9D%B4%EC%8A%88-troubleshooting/Sat, 06 Dec 2025 09:00:00 +0900https://joonlog.github.io/p/ncp%EC%97%90%EC%84%9C-xen-%EA%B8%B0%EB%B0%98-rocky-linux-8-%EC%97%85%EB%8D%B0%EC%9D%B4%ED%8A%B8-%ED%9B%84-%EB%B6%80%ED%8C%85-%EC%9D%B4%EC%8A%88-troubleshooting/<ul> <li> <p>TroubleShooting - XEN 기반 Rocky Linux 8 업데이트 후 부팅 이슈</p> <blockquote> <p>NCP의 Xen 기반 Rocky 8 서버에서 커널 관련 업데이트 후 부팅이 되지 않을 때의 해결 방법</p> </blockquote> <h3 id="환경">환경 </h3><ul> <li>CSP: NCP</li> <li>하이퍼바이저: Xen</li> <li>OS: Rocky 8.10</li> </ul> <h3 id="문제-상황">문제 상황 </h3><ul> <li>서버에 3rd 파티 솔루션 설치가 필요했던 상황</li> <li>솔루션 설치 간 다량의 패키지 확인 및 설치가 필요한데, 이 과정 중 grub 업데이트가 포함되어 있었음</li> <li>패키지 설치 후 재부팅 시 부팅이 되지 않음</li> <li>NCP 콘솔에서 원격 접속 시 grub으로 빠지는 것을 확인</li> </ul> <h3 id="해결-방법">해결 방법 </h3><ol> <li> <p>NCP 콘솔에서 서버 연격 접속 클릭</p> </li> <li> <p>파일 시스템 정상 확인</p> <ul> <li><code>ls</code>로 grub이 인식하는 디스크 파티션 확인</li> <li><code>ls (hd0,msdos1)/</code> 같은 명령으로 OS 파일(커널, initramfs 등)이 실제로 존재하는지 확인</li> </ul> </li> <li> <p>부팅할 파일 확인</p> <ul> <li> <p><code>/boot</code> 디렉터리에 있는 커널(<code>vmlinuz-*</code>)과 initramfs(<code>initramfs-*</code>) 파일이 있는지 확인</p> </li> <li> <p>ex) <code>vmlinuz-4.18</code>, <code>initramfs-4.18</code></p> <p><img src="https://joonlog.github.io/p/ncp%EC%97%90%EC%84%9C-xen-%EA%B8%B0%EB%B0%98-rocky-linux-8-%EC%97%85%EB%8D%B0%EC%9D%B4%ED%8A%B8-%ED%9B%84-%EB%B6%80%ED%8C%85-%EC%9D%B4%EC%8A%88-troubleshooting/TroubleShootingNCPXenRocky8BootingIssue01.png" width="554" height="162" srcset="https://joonlog.github.io/p/ncp%EC%97%90%EC%84%9C-xen-%EA%B8%B0%EB%B0%98-rocky-linux-8-%EC%97%85%EB%8D%B0%EC%9D%B4%ED%8A%B8-%ED%9B%84-%EB%B6%80%ED%8C%85-%EC%9D%B4%EC%8A%88-troubleshooting/TroubleShootingNCPXenRocky8BootingIssue01_hu_fc797d393a1b857a.png 480w, https://joonlog.github.io/p/ncp%EC%97%90%EC%84%9C-xen-%EA%B8%B0%EB%B0%98-rocky-linux-8-%EC%97%85%EB%8D%B0%EC%9D%B4%ED%8A%B8-%ED%9B%84-%EB%B6%80%ED%8C%85-%EC%9D%B4%EC%8A%88-troubleshooting/TroubleShootingNCPXenRocky8BootingIssue01_hu_ddd5d3d1f3b601fe.png 1024w" loading="lazy" alt="TroubleShootingNCPXenRocky8BootingIssue01.png" class="gallery-image" data-flex-grow="341" data-flex-basis="820px" ></p> </li> </ul> </li> <li> <p>Grub 명령어로 부팅</p> <ul> <li>커널을 직접 로드하고 강제 부팅</li> </ul> <div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span><span class="lnt">2 </span><span class="lnt">3 </span><span class="lnt">4 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-bash" data-lang="bash"><span class="line"><span class="cl">grub&gt; <span class="nb">set</span> <span class="nv">root</span><span class="o">=(</span>hd0,msdos1<span class="o">)</span> </span></span><span class="line"><span class="cl">grub&gt; linux /vmlinuz-4.18.0-553.53.1.el8_10.x86_64 <span class="nv">root</span><span class="o">=</span>/dev/xvda2 ro </span></span><span class="line"><span class="cl">grub&gt; initrd /initramfs-4.18.0-553.53.1.el8_10.x86_64.img </span></span><span class="line"><span class="cl">grub&gt; boot </span></span></code></pre></td></tr></table> </div> </div></li> <li> <p>정상 부팅 확인 후 Grub 파일 재설치</p> <div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-bash" data-lang="bash"><span class="line"><span class="cl">grub2-install /dev/xvda </span></span></code></pre></td></tr></table> </div> </div></li> <li> <p>NCP 콘솔에서 서버 강제 정지 후 시작</p> <ul> <li>NCP 콘솔에서 서버가 운영중 상태로 표시되면 성공 <ul> <li>이 방법으로 부팅 되지 않으면 스냅샷 생성 및 데이터 이동을 통한 복구 필요</li> </ul> </li> </ul> </li> </ol> <h3 id="참고">참고 </h3><p>NCP 가이드: <a class="link" href="https://guide.ncloud-docs.com/docs/xen-rocky8-grub-boot-issue" target="_blank" rel="noopener" >https://guide.ncloud-docs.com/docs/xen-rocky8-grub-boot-issue</a></p> </li> </ul>