{"id":68,"date":"2008-04-19T00:00:00","date_gmt":"2008-04-19T00:00:00","guid":{"rendered":"http:\/\/netexpertise\/fr\/?p=68"},"modified":"2021-10-05T14:12:28","modified_gmt":"2021-10-05T13:12:28","slug":"astuces-xen","status":"publish","type":"post","link":"http:\/\/www.netexpertise.eu\/fr\/systeme\/linux\/astuces-xen.html","title":{"rendered":"Trucs et astuces Xen"},"content":{"rendered":"<h3>D\u00e9sactiver les fichiers images<\/h3>\n<div style=\"float:left; margin-right:15px; margin-top:0px;\">\n<script async=\"\" src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script><br \/>\n<!-- 200x200, Netexpertise --><br \/>\n<ins class=\"adsbygoogle\" style=\"display:inline-block;width:200px;height:200px\" data-ad-client=\"ca-pub-6495750100906580\" data-ad-slot=\"1946825373\"><\/ins><br \/>\n<script><br \/>\n(adsbygoogle = window.adsbygoogle || []).push({});<br \/>\n<\/script><\/div>\n<p>Xen cr\u00e9e habituellement des images de ses domaines dans \/var\/lib\/xen\/save pour acc\u00e9l\u00e9rer entre autres, leur red\u00e9marrage, ce qui peut causer un \/var full sur le dom0. Pour d\u00e9sactiver cette fonction, \u00e9diter \/etc\/sysconfig\/xendomains ou \/etc\/default\/xendomains et remplacer<\/p>\n<pre>\"XENDOMAINS_SAVE=\/var\/lib\/xen\/save\"<\/pre>\n<p>par<\/p>\n<pre>\"XENDOMAINS_SAVE=\"<\/pre>\n<p>Ceci envoie un signal shutdown \u00e0 toutes les machines virtuelles avant que dom0 ne reboote. Un timeout de 300 secondes par d\u00e9faut est d\u00e9fini avant d&rsquo;interrompre l&rsquo;OS o\u00f9 il aurait plant\u00e9 pendant la phase d&rsquo;arr\u00eat.<br \/>\n&nbsp;<\/p>\n<h3>Routes statiques<\/h3>\n<p>Le fichier \/etc\/sysconfig\/static-routes est toujours support\u00e9 mais les routes sont supprom\u00e9es apr\u00e8s que le d\u00e9mon ait \u00e9t\u00e9 lanc\u00e9. Depuis Redhat Enterprise Linux 3, il est recommand\u00e9 d&rsquo;utiliser \/etc\/sysconfig\/network-scripts\/route-ethX. Le fichier doit contenir des informations similaires \u00e0 ceci par exemple:<\/p>\n<pre>GATEWAY0=10.25.207.163\nNETMASK0=255.255.252.0\nADDRESS0=10.22.40.0\n\nGATEWAY1=10.25.207.163\nNETMASK1=255.255.252.0\nADDRESS1=10.22.208.0\n<\/pre>\n<p>&nbsp;<\/p>\n<h3>Acc\u00e8s console virtuelle<\/h3>\n<p>2 m\u00e9thodes sont possibles pour acc\u00e9der \u00e0 la console du domU:<\/p>\n<ul>\n<li>\n\u00ab\u00a0xm console xenhost\u00a0\u00bb Si la machine virtuelle est arr\u00e9t\u00e9e, \u00ab\u00a0xm create -c xenhost\u00a0\u00bb la boote et lance sa console. N\u00e9anmoins, les messages de l&rsquo;espace utilisateur ne sont pas affich\u00e9s &#8211; comme le d\u00e9marrage des services.<\/li>\n<li>\nLa 2me option est de lancer vncviewer qui \u00e9mule une console couleur.<br \/>\nChaque h\u00f4te virtuel Xen a son propre port VNC sur la machine physique. Ils sont de la forme 590X. On peut trouver les ports avec netstat par exemple.<br \/>\nOuvrir un gestionnaire X11 sur son poste puis sur la machine physique:<\/p>\n<pre>export DISPLAY=10.22.41.229:0.0\nvncviewer localhost:590X\n<\/pre>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Clavier sous VNC<\/h3>\n<p>Avant Redhat Enterprise 5.1, le clavier est toujours en qwerty dans un mode minimaliste. En effet, seuls les caract\u00e8res alphab\u00e9tiques sont accessibles. Il faut mettre le dom0 \u00e0 jour (au moins RHEL5.1) pour acc\u00e9der \u00e0 tous les caract\u00e8res et sp\u00e9cifier la map voulue.<br \/>\nAjouter le mot-cl\u00e9 \u00ab\u00a0keymap\u00a0\u00bb au fichier de configuration Xen. Exemple:<\/p>\n<pre>vfb = [ \"type=vnc,keymap=fr\" ]\n<\/pre>\n<p>&nbsp;<\/p>\n<h3>Console s\u00e9rie<\/h3>\n<p>Pour acc\u00e9der \u00e0 la console d&rsquo;une machine avec noyau Xen par le port s\u00e9rie, Grub doit \u02c6tre reconfigur\u00e9 de cette main\u00e8re:<\/p>\n<pre>title vmlinuz-2.6.18-53.el5xen\n       root (hd0,0)\n       kernel \/xen.gz-2.6.18-53.el5 com2=115200,8n1 pnpacpi=off console=com2L\n       module \/vmlinuz-2.6.18-53.el5xen ro root=\/dev\/sys1liege\/rootfs console=xvc xencons=xvc\n       module \/initrd-2.6.18-53.el5xen.img\n<\/pre>\n<p>L&rsquo;entr\u00e9e suivante doit aussi \u00eatre ajout\u00e9e dans \/etc\/inittab<\/p>\n<pre>7:2345:respawn:\/sbin\/agetty -L 115200 ttyS1 vt102 ou\nco:2345:respawn:\/sbin\/agetty xvc0 115200 vt100-nav<\/pre>\n<p>Ajouter \u00ab\u00a0xvc\u00a0\u00bb dans \/etc\/securetty peut aussi \u00eatre n\u00e9cessaire.<\/p>\n<p>&nbsp;<\/p>\n<h3>NTP<\/h3>\n<p>Le service NTP n&rsquo;a pas besoin d&rsquo;\u00eatre lanc\u00e9 sur les machines virtuelles. Le temps est synchronis\u00e9 avec la machine h\u00f4te.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>D\u00e9sactiver les fichiers images Xen cr\u00e9e habituellement des images de ses domaines dans \/var\/lib\/xen\/save pour acc\u00e9l\u00e9rer entre autres, leur red\u00e9marrage, ce qui peut causer un \/var full sur le dom0. Pour d\u00e9sactiver cette fonction, \u00e9diter \/etc\/sysconfig\/xendomains ou \/etc\/default\/xendomains et remplacer \u00ab\u00a0XENDOMAINS_SAVE=\/var\/lib\/xen\/save\u00a0\u00bb par \u00ab\u00a0XENDOMAINS_SAVE=\u00a0\u00bb Ceci envoie un signal shutdown \u00e0 toutes les machines virtuelles avant que [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false},"categories":[10,373],"tags":[114,111,407,117,92,116,115,110],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.13 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Netexpertise - Trucs et astuces Xen<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.netexpertise.eu\/fr\/systeme\/linux\/astuces-xen.html\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Netexpertise - Trucs et astuces Xen\" \/>\n<meta property=\"og:description\" content=\"D\u00e9sactiver les fichiers images Xen cr\u00e9e habituellement des images de ses domaines dans \/var\/lib\/xen\/save pour acc\u00e9l\u00e9rer entre autres, leur red\u00e9marrage, ce qui peut causer un \/var full sur le dom0. Pour d\u00e9sactiver cette fonction, \u00e9diter \/etc\/sysconfig\/xendomains ou \/etc\/default\/xendomains et remplacer &quot;XENDOMAINS_SAVE=\/var\/lib\/xen\/save&quot; par &quot;XENDOMAINS_SAVE=&quot; Ceci envoie un signal shutdown \u00e0 toutes les machines virtuelles avant que [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.netexpertise.eu\/fr\/systeme\/linux\/astuces-xen.html\" \/>\n<meta property=\"og:site_name\" content=\"Netexpertise\" \/>\n<meta property=\"article:published_time\" content=\"2008-04-19T00:00:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2021-10-05T13:12:28+00:00\" \/>\n<meta name=\"author\" content=\"dave\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@netexpertise\" \/>\n<meta name=\"twitter:site\" content=\"@netexpertise\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.netexpertise.eu\/fr\/systeme\/linux\/astuces-xen.html\",\"url\":\"https:\/\/www.netexpertise.eu\/fr\/systeme\/linux\/astuces-xen.html\",\"name\":\"Netexpertise - Trucs et astuces Xen\",\"isPartOf\":{\"@id\":\"http:\/\/www.netexpertise.eu\/fr\/#website\"},\"datePublished\":\"2008-04-19T00:00:00+00:00\",\"dateModified\":\"2021-10-05T13:12:28+00:00\",\"author\":{\"@id\":\"http:\/\/www.netexpertise.eu\/fr\/#\/schema\/person\/e398f0307e2b167f6b884c4953be2632\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.netexpertise.eu\/fr\/systeme\/linux\/astuces-xen.html#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.netexpertise.eu\/fr\/systeme\/linux\/astuces-xen.html\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.netexpertise.eu\/fr\/systeme\/linux\/astuces-xen.html#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Accueil\",\"item\":\"http:\/\/www.netexpertise.eu\/fr\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Trucs et astuces Xen\"}]},{\"@type\":\"WebSite\",\"@id\":\"http:\/\/www.netexpertise.eu\/fr\/#website\",\"url\":\"http:\/\/www.netexpertise.eu\/fr\/\",\"name\":\"Netexpertise\",\"description\":\"Syst\u00e8mes \/ R\u00e9seaux \/ DevOps\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"http:\/\/www.netexpertise.eu\/fr\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"fr-FR\"},{\"@type\":\"Person\",\"@id\":\"http:\/\/www.netexpertise.eu\/fr\/#\/schema\/person\/e398f0307e2b167f6b884c4953be2632\",\"name\":\"dave\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"http:\/\/www.netexpertise.eu\/fr\/#\/schema\/person\/image\/\",\"url\":\"http:\/\/1.gravatar.com\/avatar\/1129916e1f4955bd632f27f836f64e55?s=96&d=mm&r=g\",\"contentUrl\":\"http:\/\/1.gravatar.com\/avatar\/1129916e1f4955bd632f27f836f64e55?s=96&d=mm&r=g\",\"caption\":\"dave\"},\"sameAs\":[\"http:\/\/www.netexpertise.eu\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Netexpertise - Trucs et astuces Xen","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.netexpertise.eu\/fr\/systeme\/linux\/astuces-xen.html","og_locale":"fr_FR","og_type":"article","og_title":"Netexpertise - Trucs et astuces Xen","og_description":"D\u00e9sactiver les fichiers images Xen cr\u00e9e habituellement des images de ses domaines dans \/var\/lib\/xen\/save pour acc\u00e9l\u00e9rer entre autres, leur red\u00e9marrage, ce qui peut causer un \/var full sur le dom0. 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