{"id":37530,"date":"2019-10-31T22:18:10","date_gmt":"2019-10-31T19:18:10","guid":{"rendered":"https:\/\/prohoster.info\/blog\/ip-kvm-cherez-qemu\/"},"modified":"2019-10-31T22:18:10","modified_gmt":"2019-10-31T19:18:10","slug":"ip-kvm-cherez-qemu","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/administrirovanie\/ip-kvm-cherez-qemu","title":{"rendered":"IP-KVM QEMU kaudu","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"IP-KVM QEMU kaudu\" src=\"\/wp-content\/uploads\/2019\/08\/f9620a262b690b4494984658d33805f9.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nK\u00e4ivitamise t\u00f5rkeotsing kaugserverites, kus puudub KVM, on keeruline \u00fclesanne. Loome endale KVM-over-IP taastamispildiga ja virtuaalmasinaga.<\/p>\n<p>Probleemide korral operatsioonis\u00fcsteemiga <noindex><a rel=\"nofollow\" href=\"http:\/\/slc.tl\/q58Za\">kaugserveris<\/a><\/noindex>, laadib administraator taastamispildi ja viib l\u00e4bi vajalikud toimingud. See meetod t\u00f6\u00f6tab h\u00e4sti, kui rikke p\u00f5hjus on teada, ja taastamispilt ning serveeritud operatsioonis\u00fcsteem kuuluvad samasse perekonda. Kui rikke p\u00f5hjus ei ole veel teada, on vajalik j\u00e4lgida operatsioonis\u00fcsteemi k\u00e4ivitamise k\u00e4iku.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h2>Kaug-KVM<\/h2>\n<p>\nServeri konsoolile saab ligi p\u00e4\u00e4seda integreeritud vahendite, nagu IPMI v\u00f5i Intel\u00ae vPro\u2122, kaudu, v\u00f5i v\u00e4listelt seadmetelt, mida nimetatakse IP-KVM-iks. On olukordi, kus k\u00f5ik loetletud tehnoloogiad ei ole kergesti k\u00e4ttesaadavad. Siiski ei ole see l\u00f5pp. Kui serverit saab kaugelt taask\u00e4ivitada Linuxi-p\u00f5hisesse taastamispildisse, saab kiiresti korraldada KVM-over-IP.<\/p>\n<p>Taastes\u00fcsteem on t\u00e4ielik operatsioonis\u00fcsteem, mis paikneb m\u00e4lus. Seega saame k\u00e4ivitada mis tahes tarkvara, sealhulgas virtuaalmasinaid (VM). See t\u00e4hendab, et saab k\u00e4ivitada VM-i, milles t\u00f6\u00f6tab serveri operatsioonis\u00fcsteem. Juurdep\u00e4\u00e4s VM-i konsoolile v\u00f5ib olla organiseeritud n\u00e4iteks VNC kaudu.<\/p>\n<p>Serveri operatsioonis\u00fcsteemi k\u00e4ivitamiseks VM-i sees tuleb serveri kettad m\u00e4\u00e4rata VM-i kettadeks. Linuxi operatsioonis\u00fcsteemide peres kujutatakse f\u00fc\u00fcsilisi kettaid plokkseadmetena, mis on kujul <b>\/dev\/sdX<\/b>, millega saab t\u00f6\u00f6tada nagu tavaliste failidega.<\/p>\n<p>M\u00f5ned h\u00fcperviisorid, nagu QEMU ja VirtualBox, v\u00f5imaldavad hoida VM-i andmeid \"toorses\" vormis, see t\u00e4hendab ainult andmed salvestamisest ilma h\u00fcperviisori metaandmeteta. Seega saab VM-i k\u00e4ivitada, kasutades serveri f\u00fc\u00fcsilisi kettaid.<\/p>\n<p>Selline meetod n\u00f5uab ressursse taastamispildi ja VM-i k\u00e4ivitamiseks. Kuid nelja v\u00f5i enama gigabaidi operatiivm\u00e4lu olemasolul ei tohiks see probleemiks kujuneda.<\/p>\n<h2>Keskkonna ettevalmistamine<\/h2>\n<p>\nVirtuaalma\u0161ina saab olla kerge ja lihtne programm <noindex><a rel=\"nofollow\" href=\"https:\/\/www.qemu.org\/\">QEMU<\/a><\/noindex>, mis enamasti ei ole osa taastamisimage'ist, seega peab see olema installitud eraldi. Taastamisimage, mida pakume klientidele, p\u00f5hineb <noindex><a rel=\"nofollow\" href=\"https:\/\/www.archlinux.org\/\">Arch Linuxis<\/a><\/noindex>, kus kasutatakse paketihaldurit <b>pacman<\/b>.<\/p>\n<p>Esiteks on vaja veenduda, et taastamisimage kasutab tarkvara uusimaid versioone. K\u00f5ik operatsioonis\u00fcsteemi komponendid saab kontrollida ja uuendada j\u00e4rgmise k\u00e4suga:<\/p>\n<p><code>pacman -Suy<\/code><\/p>\n<p>P\u00e4rast v\u00e4rskendamist on vajalik QEMU installida. Paigaldamiseks pacman'i kaudu n\u00e4eb k\u00e4sk v\u00e4lja j\u00e4rgmine:<\/p>\n<p><code>pacman -S qemu<\/code><\/p>\n<p>Kontrollime, kas qemu on \u00f5igesti installitud:<\/p>\n<p><code>root@sel-rescue ~ # qemu-system-x86_64 --versioon<br \/>\nQEMU emulaator versioon 4.0.0<br \/>\nAutori\u00f5igus (c) 2003-2019 Fabrice Bellard ja QEMU projekti arendajad<\/code><\/p>\n<p>Kui k\u00f5ik on korras, on taastamisimage t\u00f6\u00f6valmis.<\/p>\n<h2>Virtuaalma\u0161ina k\u00e4ivitamine<\/h2>\n<p>\nEsmalt tuleks m\u00e4\u00e4rata, kui palju ressursse VM-ile eraldatakse, ja teada saada f\u00fc\u00fcsiliste ketaste asukohti. Meie juhul eraldame virtuaalma\u0161inale kaks s\u00fcdamikku ja kaks gigabaiti RAM-i, ning kettad asuvad tee peal <b>\/dev\/sda<\/b> ja <b>\/dev\/sdb<\/b>. K\u00e4ivitame VM:<\/p>\n<p><code>qemu-system-x86_64 <br \/>\n -m 2048M <br \/>\n -net nic -net user <br \/>\n -enable-kvm <br \/>\n -cpu host,nx <br \/>\n -M pc <br \/>\n -smp 2 <br \/>\n -vga std <br \/>\n -drive file=\/dev\/sda,format=raw,index=0,media=disk <br \/>\n -drive file=\/dev\/sdb,format=raw,index=1,media=disk <br \/>\n -vnc :0,password <br \/>\n -monitor stdio<\/code><\/p>\n<p>Natuke p\u00f5hjalikumalt, mida iga parameeter t\u00e4hendab:<\/p>\n<ul>\n<li><b>-m 2048M<\/b> \u2014 eraldame 2 GB RAM-i VM-ile;<\/li>\n<li><b>-net nic -net user<\/b> \u2014 lisame lihtsa \u00fchenduse v\u00f5rku h\u00fcperviisori kaudu, kasutades NAT (Network Address Translation);<\/li>\n<li><b>-enable-kvm<\/b> \u2014 aktiveerime t\u00e4ieliku virtualiseerimise KVM (Kernel Virtual Machine);<\/li>\n<li><b>-cpu host<\/b> \u2014 k\u00e4sime virtuaalprotsessoril kasutada serveri protsessori kogu funktsionaalsust;<\/li>\n<li><b>-M pc<\/b> \u2014 seadme t\u00fc\u00fcp: PC;<\/li>\n<li><b>-smp 2<\/b> \u2014 virtuaalprotsessor peab olema kahe s\u00fcdamega;<\/li>\n<li><b>-vga std<\/b> \u2014 valime standardse graafikakaardi, mis ei toeta suurte ekraani resolutsioonide kasutamist;<\/li>\n<li><b>-drive file=\/dev\/sda,format=raw,index=0,media=disk<\/b>\n<ul>\n<li><b>file=\/dev\/sdX<\/b> \u2014 tee plokiseadmest, mis esindab serveri ketast;<\/li>\n<li><b>format=raw<\/b> \u2014 m\u00e4rgime, et m\u00e4\u00e4ratud failis k\u00f5ik andmed on 'toore' vormis, see t\u00e4hendab t\u00e4pselt nagu ketas;<\/li>\n<li><b>index=0<\/b> \u2014 ketta number, peab iga j\u00e4rgmise ketta puhul kasvama \u00fche v\u00f5rra;<\/li>\n<li><b>media=disk<\/b> \u2014 virtuaalmasin peab tuvastama selle salvestuse kettana;<\/li>\n<\/ul>\n<\/li>\n<li><b>-vnc :0, password<\/b> \u2014 k\u00e4ivitame VNC-serveri vaikimisi aadressil 0.0.0.0:5900, autoriseerimiseks kasutame parooli;<\/li>\n<li><b>-monitor stdio<\/b> \u2014 administraatori suhtlus qemu-ga toimub l\u00e4bi standardsete sisendi- ja v\u00e4ljundi voogude.<\/li>\n<\/ul>\n<p>\nKui k\u00f5ik on korras, k\u00e4ivitub QEMU monitor: <\/p>\n<p><code>QEMU 4.0.0 monitor - tippige 'abi' lisainfot jaoks<br \/>\n(qemu)<\/code><\/p>\n<p>Oleme m\u00e4rkinud, et autentimine toimub parooli kaudu, kuid ei ole m\u00e4\u00e4ranud ise parooli. Selleks saab QEMU monitori saata k\u00e4su change vnc password.<\/p>\n<p><code>(qemu) muuda vnc parooli<br \/>\nParool: ******<\/code><\/p>\n<p>P\u00e4rast seda saame \u00fchenduda iga VNC-kliendiga, nagu n\u00e4iteks Remmina, meie serveri IP-aadressilt, kasutades m\u00e4\u00e4ratud parooli.<\/p>\n<p><img decoding=\"async\" alt=\"IP-KVM QEMU kaudu\" src=\"\/wp-content\/uploads\/2019\/08\/f735a37d49038b472d6e5c22df4e7570.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<img decoding=\"async\" alt=\"IP-KVM QEMU kaudu\" src=\"\/wp-content\/uploads\/2019\/08\/02a12b62938a7883363807eaa379279f.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nN\u00fc\u00fcd n\u00e4eme mitte ainult v\u00f5imalikke vigu laadimisprotsessi etapis, vaid saame nendega ka tegeleda.<\/p>\n<p>T\u00f6\u00f6 l\u00f5petamisel tuleb virtuaalmasin l\u00f5petada. Seda saab teha kas operatsioonis\u00fcsteemis, saates v\u00e4lja v\u00e4ljal\u00fclitussignaali, v\u00f5i andes k\u00e4su <b>system_powerdown<\/b> QEMU monitoris. See on v\u00f5rdne \u00fche vajutusega v\u00e4ljal\u00fclitusnupul: operatsioonis\u00fcsteem virtuaalmasinas l\u00f5petab sujuvalt oma t\u00f6\u00f6.<\/p>\n<h2>Operatsioonis\u00fcsteemi installimine<\/h2>\n<p>\nVirtuaalmasinal on t\u00e4isjuurdep\u00e4\u00e4s serveri ketastele ja seet\u00f5ttu saab seda kasutada operatsioonis\u00fcsteemi k\u00e4sitsi installimiseks. Ainsaks piiranguks on RAM-i maht: mitte alati ei saa ISO-pilti mahutada RAM-i. M\u00e4\u00e4rame nelik\u00fcmmend gigabaiti pildi salvestamiseks RAM-i <b>\/mnt<\/b>:<\/p>\n<p><code>mount -t tmpfs -o size=4G tmpfs \/mnt<\/code><\/p>\n<p>Laadime ka FreeBSD 12.0 operatsioonis\u00fcsteemi installifaili:<\/p>\n<p><code>wget -P \/mnt ftp:\/\/ftp.freebsd.org\/pub\/FreeBSD\/releases\/amd64\/amd64\/ISO-IMAGES\/12.0\/FreeBSD-12.0-RELEASE-amd64-bootonly.iso<\/code><\/p>\n<p>N\u00fc\u00fcd on v\u00f5imalik VM-i k\u00e4ivitada:<\/p>\n<p><code>qemu-system-x86_64 <br \/>\n -m 2048M <br \/>\n -net nic -net user <br \/>\n -enable-kvm <br \/>\n -cpu host,nx <br \/>\n -M pc <br \/>\n -smp 2 <br \/>\n -vga std <br \/>\n -drive file=\/dev\/sda,format=raw,index=0,media=disk <br \/>\n -drive file=\/dev\/sdb,format=raw,index=1,media=disk <br \/>\n -vnc :0,password <br \/>\n -monitor stdio <br \/>\n -cdrom \/mnt\/FreeBSD-12.0-RELEASE-amd64-bootonly.iso <br \/>\n -boot d<br \/>\n<\/code><\/p>\n<p>Lipp <b>-boot d<\/b> seab CD-diskilt k\u00e4ivitamise. \u00dchendame VNC-kliendi ja n\u00e4eme FreeBSD laadijat.<\/p>\n<p><img decoding=\"async\" alt=\"IP-KVM QEMU kaudu\" src=\"\/wp-content\/uploads\/2019\/08\/722f904ba4212bcce8746ca473489d50.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nKuna interneti\u00fchendus saadakse DHCP kaudu, v\u00f5ib seade loomise j\u00e4rel olla vajalik k\u00e4ivitada just installitud s\u00fcsteem ja parandada v\u00f5rguseadeid. M\u00f5nel juhul v\u00f5ib olla vajalik installida v\u00f5rgukaardi draiverid, kuna serverisse paigaldatud ja VM-is emuleeritud v\u00f5rgukaart erinevad.<\/p>\n<h2>Kokkuv\u00f5te<\/h2>\n<p>\nSee kaugjuurdep\u00e4\u00e4su meetod tarbib osa serveri ressurssidest, kuid ei sea seadmele mingeid eritingimusi, mist\u00f5ttu v\u00f5ib seda rakendada peaaegu igas keskkonnas. Sellise lahenduse kasutamine lihtsustab oluliselt programmivigu ja eemal olevate serverite taastamist.<br \/>\n<br \/>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/selectel\/blog\/464565\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0423\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435 \u043d\u0435\u0438\u0441\u043f\u0440\u0430\u0432\u043d\u043e\u0441\u0442\u0435\u0439 \u043f\u0440\u0438 \u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0435 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u043d\u0430 \u0441\u0435\u0440\u0432\u0435\u0440\u0430\u0445 \u0431\u0435\u0437 KVM \u2014 \u043d\u0435\u043f\u0440\u043e\u0441\u0442\u043e\u0435 \u0437\u0430\u043d\u044f\u0442\u0438\u0435. \u0421\u043e\u0437\u0434\u0430\u0435\u043c \u0441\u0435\u0431\u0435 KVM-over-IP \u0447\u0435\u0440\u0435\u0437 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[&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":28165,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-37530","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0423\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435 \u043d\u0435\u0438\u0441\u043f\u0440\u0430\u0432\u043d\u043e\u0441\u0442\u0435\u0439 \u043f\u0440\u0438 \u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0435 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u043d\u0430 \u0441\u0435\u0440\u0432\u0435\u0440\u0430\u0445 \u0431\u0435\u0437 KVM \u2014 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