{"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 l\u00e4bi QEMU","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"IP-KVM l\u00e4bi QEMU\" src=\"\/wp-content\/uploads\/2019\/08\/f9620a262b690b4494984658d33805f9.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nT\u00f5rkeotsing operatsioonis\u00fcsteemi k\u00e4ivitamisel serverites, kus puudub KVM, on keeruline \u00fclesanne. Loome endale KVM-over-IP taastamispildi ja virtuaalmasina abil.<\/p>\n<p>Probleemide korral operatsioonis\u00fcsteemiga <noindex><a rel=\"nofollow\" href=\"http:\/\/slc.tl\/q58Za\">kaugses serveris<\/a><\/noindex>, laadib administraator taastamispildi ja teeb vajalikud toimingud. See meetod t\u00f6\u00f6tab suurep\u00e4raselt, kui t\u00f5rke p\u00f5hjus on teada ja taastamispilt ning serveris installitud operatsioonis\u00fcsteem kuuluvad samasse perekonda. Kui t\u00f5rke p\u00f5hjus on veel teadmata, tuleb j\u00e4lgida operatsioonis\u00fcsteemi k\u00e4ivitamise protsessi.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h2>Kaugsed KVM<\/h2>\n<p>\nServeri konsoolile p\u00e4\u00e4semiseks saab kasutada sisseehitatud vahendeid nagu IPMI v\u00f5i Intel\u00ae vPro\u2122, v\u00f5i v\u00e4liseid seadmeid, mida tuntakse kui IP-KVM. On olukordi, kus k\u00f5ik \u00fclalnimetatud tehnoloogiad pole saadaval. Kuid see pole veel l\u00f5pp. Kui serverit on v\u00f5imalik kaugelt taask\u00e4ivitada Linuxi perekonna operatsioonis\u00fcsteemi taastamispildiga, saab kiiresti korraldada KVM-over-IP.<\/p>\n<p>Taastamispilt on t\u00e4isv\u00e4\u00e4rtuslik operatsioonis\u00fcsteem, mis asub operatiivm\u00e4lu sees. Seega saame k\u00e4ivitada igasugust tarkvara, sealhulgas virtuaalmasinaid (VM). See t\u00e4hendab, et VM-s saab k\u00e4ivitada serveri operatsioonis\u00fcsteemi. Juurdep\u00e4\u00e4s VM konsoolile v\u00f5ib olla korraldatud n\u00e4iteks l\u00e4bi VNC.<\/p>\n<p>Serveri operatsioonis\u00fcsteemi k\u00e4ivitamiseks VM-s tuleb m\u00e4\u00e4rata serveri kettad kui VM kettad. Linuxi perekonna operatsioonis\u00fcsteemides esindavad f\u00fc\u00fcsilised kettad plokiseadmeid, mis on kuju <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 salvestada VM andmeid \"toores\" vormis, st ainult andmehoidla ilma h\u00fcperviisori metaandmeteta. Seega on VM v\u00f5imalik k\u00e4ivitada f\u00fc\u00fcsiliste serverikettaste abil.<\/p>\n<p>Sarnane meetod n\u00f5uab ressursse taastamispildi ja VM k\u00e4ivitamiseks. Kuid kui operatiivm\u00e4lu on neli v\u00f5i enam gigabaiti, ei tekita see probleeme.<\/p>\n<h2>Keskkonna ettevalmistamine<\/h2>\n<p>\nVirtuaalmasinaks v\u00f5ib kasutada kerget ja lihtsat programmi. <noindex><a rel=\"nofollow\" href=\"https:\/\/www.qemu.org\/\">QEMU<\/a><\/noindex>, mis ei ole tavaliselt osa taastamisest, seega tuleb see installida eraldi. Taastamispilt, mida me klientidele pakume, p\u00f5hineb <noindex><a rel=\"nofollow\" href=\"https:\/\/www.archlinux.org\/\">Arch Linux<\/a><\/noindex>, kus kasutatakse paketihaldurit <b>pacman<\/b>.<\/p>\n<p>Esiteks tuleb veenduda, et taastamispilt kasutab uusimaid tarkvaraversioone. K\u00f5igi OS komponentide kontrollimiseks ja v\u00e4rskendamiseks saab kasutada j\u00e4rgmisi k\u00e4ske:<\/p>\n<p><code>pacman -Suy<\/code><\/p>\n<p>P\u00e4rast v\u00e4rskendamist tuleb installida QEMU. Installimisk\u00e4sk pacmani kaudu n\u00e4eb 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 --version<br \/>\nQEMU emulaator versioon 4.0.0<br \/>\nKopeerimine (c) 2003-2019 Fabrice Bellard ja QEMU projekti arendajad<\/code><\/p>\n<p>Kui k\u00f5ik on korras, siis on taastamispilt t\u00f6\u00f6ks valmis.<\/p>\n<h2>Virtuaalmasina k\u00e4ivitamine<\/h2>\n<p>\nEsiteks tuleb m\u00e4\u00e4rata, kui palju ressursse eraldatakse virtuaalmasinale, ja v\u00e4lja selgitada f\u00fc\u00fcsilistele kettale p\u00e4\u00e4semise teed. Meie juhul jagame virtuaalmasinale kaks tuuma ja kaks gigabaiti m\u00e4lu, kettad asuvad teel <b>\/dev\/sda<\/b> ja <b>\/dev\/sdb<\/b>. K\u00e4ivitame virtuaalmasina:<\/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>Veidi t\u00e4psemalt, mida iga parameeter t\u00e4hendab:<\/p>\n<ul>\n<li><b>-m 2048M<\/b> \u2014 eraldame 2 GB m\u00e4lu virtuaalmasinale;<\/li>\n<li><b>-net nic -net user<\/b> \u2014 lisame lihtsa v\u00f5rgu\u00fchenduse h\u00fcperviisori kaudu NAT-i (Network Address Translation) kasutades;<\/li>\n<li><b>-enable-kvm<\/b> \u2014 aktiveerime t\u00e4isvirtuaalsuse KVM (Kernel Virtual Machine) abil;<\/li>\n<li><b>-cpu host<\/b> \u2014 \u00fctleme virtuaalsele protsessorile, et see kasutab serveri protsessori t\u00e4it funktsionaalsust;<\/li>\n<li><b>-M pc<\/b> \u2014 seadme t\u00fc\u00fcp PC;<\/li>\n<li><b>-smp 2<\/b> \u2014 virtuaalne protsessor peab olema kahetuumaline;<\/li>\n<li><b>-vga std<\/b> \u2014 valime tavalise graafikakaardi, mis ei toeta suurt ekraani eraldusv\u00f5imet;<\/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 plokkseadmest, mis esindab serveri kettat;<\/li>\n<li><b>format=raw<\/b> \u2014 m\u00e4rgime, et m\u00e4\u00e4ratud failis on k\u00f5ik andmed \u201etoores\u201c kujul, see t\u00e4hendab nagu kettal;<\/li>\n<li><b>index=0<\/b> \u2014 ketta number, mis peab iga j\u00e4rgmise ketta puhul suurenema \u00fche v\u00f5rra;<\/li>\n<li><b>media=disk<\/b> \u2014 virtuaalne masin peab seda salvestust tuvastama kettana;<\/li>\n<\/ul>\n<\/li>\n<li><b>-vnc :0, password<\/b> \u2014 k\u00e4ivitame VNC-serveri vaikev\u00e4\u00e4rtustega 0.0.0.0:5900, autoriseerimise jaoks kasutame parooli;<\/li>\n<li><b>-monitor stdio<\/b> \u2014 administraatori suhtlus qemu-ga toimub l\u00e4bi standardsete sisend-v\u00e4ljundvoogude.<\/li>\n<\/ul>\n<p>\nKui k\u00f5ik on korras, k\u00e4ivitub QEMU monitor: <\/p>\n<p><code>QEMU 4.0.0 monitor - tippige 'help' lisateabe saamiseks<br \/>\n(qemu)<\/code><\/p>\n<p>Oleme m\u00e4\u00e4ranud, et autoriseerimine toimub parooli abil, kuid ei ole m\u00e4\u00e4ranud ise parooli. Seda saab teha QEMU-monitoress saatmise k\u00e4sklusega change vnc password. T\u00e4htis m\u00e4rkus: parool ei tohi olla pikem kui kaheksa m\u00e4rki.<\/p>\n<p><code>(qemu) muuda vnc parooli<br \/>\nParool: ******<\/code><\/p>\n<p>P\u00e4rast seda saame \u00fchenduda mistahes VNC-kliendiga, n\u00e4iteks Remmina, meie serveri IP-aadressi kaudu ja m\u00e4\u00e4ratud parooliga.<\/p>\n<p><img decoding=\"async\" alt=\"IP-KVM l\u00e4bi QEMU\" src=\"\/wp-content\/uploads\/2019\/08\/f735a37d49038b472d6e5c22df4e7570.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<img decoding=\"async\" alt=\"IP-KVM l\u00e4bi QEMU\" 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 jooksul, vaid saame nendega ka tegeleda.<\/p>\n<p>T\u00f6\u00f6 l\u00f5petamisel tuleb l\u00f5petada virtuaalmasin. Seda saab teha kas operatsioonis\u00fcsteemi sees, saates v\u00e4ljal\u00fclitussignaali, v\u00f5i andes k\u00e4su <b>system_powerdown<\/b> QEMU-monitooris. See vastab \u00fche korra v\u00e4ljal\u00fclitamise nupule vajutamisele: virtuaalmasina sees operatsioonis\u00fcsteem l\u00f5petab sujuvalt t\u00f6\u00f6.<\/p>\n<h2>Operatsioonis\u00fcsteemi paigaldamine<\/h2>\n<p>\nVirtuaalmasin p\u00e4\u00e4seb t\u00e4ielikult serveri k\u00f5vakettale ja seega saab seda kasutada operatsioonis\u00fcsteemi k\u00e4sitsi paigaldamiseks. Ainus piirang on RAM-i maht: mitte alati ei saa ISO-pilti RAM-i mahtu mahutada. Eraldame RAM-ist neli gigabaiti pildi hoidmiseks <b>\/mnt<\/b>:<\/p>\n<p><code>mount -t tmpfs -o size=4G tmpfs \/mnt<\/code><\/p>\n<p>Laime ka FreeBSD 12.0 installimispilti:<\/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 v\u00f5ib VM-i k\u00e4ivitama hakata:<\/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 sisse CD-draivist bootimise. \u00dchendume VNC-kliendiga ja n\u00e4eme FreeBSD k\u00e4ivitamise men\u00fc\u00fcd.<\/p>\n<p><img decoding=\"async\" alt=\"IP-KVM l\u00e4bi QEMU\" src=\"\/wp-content\/uploads\/2019\/08\/722f904ba4212bcce8746ca473489d50.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nKuna interneti\u00fchenduseks kasutati DHCP kaudu IP-aadressi saamist, v\u00f5ib p\u00e4rast seadistamist olla vajalik k\u00e4ivitada just paigaldatud s\u00fcsteem ja parandada v\u00f5rguseadeid. M\u00f5nikord v\u00f5ib osutuda vajalikuks installida v\u00f5rguadapteri draiverid, kuna serveris olev v\u00f5rgukaart ja VM-is emuleeritav v\u00f5rgukaart erinevad.<\/p>\n<h2>Kokkuv\u00f5te<\/h2>\n<p>\nSee kaugjuhtimise meetod serveri konsooli juurde tarbib osa serveri ressurssidest, kuid ei tee serveri riistvarale mingeid erilisi n\u00f5udeid, mist\u00f5ttu v\u00f5ib seda rakendada praktiliselt igasugustes tingimustes. Sellise lahenduse kasutamine muudab oluliselt lihtsamaks tarkvaravigade diagnostika ja kaugserveri t\u00f6\u00f6 taastamise.<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 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\u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u044b\u0435 \u0440\u0430\u0431\u043e\u0442\u044b. \u0422\u0430\u043a\u043e\u0439 \u0441\u043f\u043e\u0441\u043e\u0431 \u043e\u0442\u043b\u0438\u0447\u043d\u043e \u0440\u0430\u0431\u043e\u0442\u0430\u0435\u0442, \u043a\u043e\u0433\u0434\u0430 \u043f\u0440\u0438\u0447\u0438\u043d\u0430 \u0441\u0431\u043e\u044f \u0438\u0437\u0432\u0435\u0441\u0442\u043d\u0430, \u0430 \u043e\u0431\u0440\u0430\u0437 \u0432\u043e\u0441\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u0438 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u043d\u0430\u044f \u043d\u0430 \u0441\u0435\u0440\u0432\u0435\u0440\u0435 [&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 5.0.1.1 - 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.\" \/>\n\t<meta name=\"robots\" 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