{"id":556,"date":"2008-06-14T22:35:04","date_gmt":"2008-06-14T22:35:04","guid":{"rendered":"http:\/\/blografia.net\/vicm3\/?p=556"},"modified":"2008-06-14T22:35:04","modified_gmt":"2008-06-14T22:35:04","slug":"the-art-of-xen","status":"publish","type":"post","link":"https:\/\/blografia.net\/vicm3\/2008\/06\/the-art-of-xen\/","title":{"rendered":"The art of Xen"},"content":{"rendered":"

Bueno en realidad una pesadilla las xen-utils, xen-tools ayuda muchisimo, la parte compleja es lograr hacer que xm ponga los archivos donde uno quiere.<\/p>\n

test 128MB RAM 1cpu 126MB swap. dhcp ;D<\/p>\n

\ntop – 22:22:39 up 8 min, 2 users, load average: 0.00, 0.00, 0.00
\nTasks: 28 total, 2 running, 26 sleeping, 0 stopped, 0 zombie
\nCpu(s): 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
\nMem: 131072k total, 43348k used, 87724k free, 1688k buffers
\nSwap: 131064k total, 0k used, 131064k free, 10648k cached<\/p>\n

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
\n 1 root 18 0 6120 680 560 S 0.0 0.5 0:00.06 init
\n 2 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration\/0
\n 3 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd\/0
\n 4 root RT 0 0 0 0 S 0.0 0.0 0:00.00 watchdog\/0
\n 5 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 events\/0
\n 6 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 khelper
\n 7 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 kthread
\n 8 root 20 -5 0 0 0 S 0.0 0.0 0:00.00 xenwatch
\n 9 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 xenbus
\n 15 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 kblockd\/0
\n 19 root 20 -5 0 0 0 S 0.0 0.0 0:00.00 khubd
\n 21 root 20 -5 0 0 0 S 0.0 0.0 0:00.00 kseriod
\n 63 root 25 0 0 0 0 S 0.0 0.0 0:00.00 pdflush
\n 64 root 15 0 0 0 0 S 0.0 0.0 0:00.00 pdflush
\n 65 root 20 -5 0 0 0 S 0.0 0.0 0:00.00 kswapd0
\n 66 root 20 -5 0 0 0 S 0.0 0.0 0:00.00 aio\/0
\n 641 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 kjournald<\/p>\n<\/blockquote>\n

xentop en el host<\/p>\n

\nxentop – 17:23:05 Xen 3.0.3-1
\n2 domains: 1 running, 1 blocked, 0 paused, 0 crashed, 0 dying, 0 shutdown
\nMem: 1046704k total, 1046144k used, 560k free CPUs: 2 @ 2793MHz
\n NAME STATE CPU(sec) CPU(%) MEM(k) MEM(%) MAXMEM(k) MAXMEM(%) VCPUS
\n NETS NETTX(k) NETRX(k) VBDS VBD_OO VBD_RD VBD_WR SSID
\n Domain-0 —–r 9801 199.9 886908 84.7 no limit n\/a 2
\n 4 6349 215300 0 0 0 0 0
\n test –b— 3 0.1 130936 12.5 131072 12.5 1
\n 1 29 58 2 0 705 355 0\n<\/p><\/blockquote>\n

top en el host (Domu0)<\/p>\n

\ntop – 17:24:04 up 1:24, 6 users, load average: 2.84, 2.97, 2.74
\nTasks: 92 total, 4 running, 88 sleeping, 0 stopped, 0 zombie
\nCpu(s): 0.0%us, 0.0%sy, 99.7%ni, 0.2%id, 0.0%wa, 0.0%hi, 0.0%si, 0.2%st
\nMem: 886784k total, 664124k used, 222660k free, 21212k buffers
\nSwap: 3012148k total, 60k used, 3012088k free, 411760k cached<\/p>\n

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
\n 8389 vicm3 39 19 73432 68m 12 R 100 7.9 21:01.60 setiathome-5.27
\n 2594 vicm3 39 19 40616 36m 12 R 99 4.2 74:14.33 setiathome-5.27
\n 1 root 18 0 6120 692 568 S 0 0.1 0:01.40 init
\n 2 root RT 0 0 0 0 S 0 0.0 0:00.08 migration\/0
\n 3 root 34 19 0 0 0 S 0 0.0 0:00.00 ksoftirqd\/0
\n 4 root RT 0 0 0 0 S 0 0.0 0:00.00 watchdog\/0
\n 5 root RT 0 0 0 0 S 0 0.0 0:00.10 migration\/1
\n 6 root 34 19 0 0 0 S 0 0.0 0:00.00 ksoftirqd\/1
\n 7 root RT 0 0 0 0 S 0 0.0 0:00.00 watchdog\/1
\n 8 root 10 -5 0 0 0 S 0 0.0 0:00.08 events\/0
\n 9 root 10 -5 0 0 0 S 0 0.0 0:00.04 events\/1
\n 10 root 10 -5 0 0 0 S 0 0.0 0:00.00 khelper
\n 11 root 11 -5 0 0 0 S 0 0.0 0:00.00 kthread
\n 13 root 10 -5 0 0 0 S 0 0.0 0:00.01 xenwatch
\n 14 root 10 -5 0 0 0 S 0 0.0 0:00.04 xenbus
\n 17 root 10 -5 0 0 0 S 0 0.0 0:00.00 kblockd\/0
\n 18 root 10 -5 0 0 0 S 0 0.0 0:00.00 kblockd\/1\n<\/p><\/blockquote>\n

Por cierto si lo quieren es echar a andar un xen olvidense del bonito libro de Prentice Hall:<\/p>\n

\u00abRunning Xen: A Hands-On Guide to the Art of Virtualization by Jeanna N. Matthews; Eli M. Dow; Todd Deshane; Wenjin Hu; Jeremy Bongio; Patrick F. Wilbur; Brendan Johnson, Publisher: Prentice Hall, Pub Date: April 10, 2008\u00bb<\/p>\n

En lo que he avanzado de su lectura no hay pista alguna que no sea con el livecd de xen… y yo lo quiero ya correr en mi maquina… para eso fuertemente recomiendo El manual del usuario de Xen<\/a> + Xen-tools en Debian Administration<\/a> por Steve Kemp<\/a>. Lo que anduve perdido como 2 horas lo resolvio el xen-tools… en 15 minutos (lo que hacia debootstrap), ahora a entender como crea las configuraciones, por que ahi fue donde tuve mas problema, para mayor referencia en el manual de xen en myvmconf, por cierto el libro de prentice si van a la parte teorica fuerte de la paravirtualizacion y los recovecos, eso si es bien probable que queden mas conformes que yo (o que cuando termine de leerlo cambie de opinion).<\/p>\n

Y si, esto parece un juguete divertido… poder crear instancias para que cada sistemita se rompa en ellas es bastante interesante, algunas repercusiones en cuanto a seguridad para considerar pero muy interesante el juguete.<\/p>\n","protected":false},"excerpt":{"rendered":"

Bueno en realidad una pesadilla las xen-utils, xen-tools ayuda muchisimo, la parte compleja es lograr hacer que xm ponga los archivos donde uno quiere. test 128MB RAM 1cpu 126MB swap. dhcp ;D top – 22:22:39 up 8 min, 2 users, … Sigue leyendo →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[1],"tags":[],"class_list":["post-556","post","type-post","status-publish","format-standard","hentry","category-sin-categoria"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":235,"url":"https:\/\/blografia.net\/vicm3\/2006\/02\/the_server_is_now_under_siege\/","url_meta":{"origin":556,"position":0},"title":"The server is now under siege..","author":"vicm3","date":"11 febrero, 2006","format":false,"excerpt":"Totalmente, siege logro mas que hammerhead, la posibilidad de pasarle directamente un URL... me permitio ver como le pegaba a la DB top - 12:10:09 up 31 days, 15:13, 2 users, load average: 13.11, 89.48, 104.04 Tasks: 183 total, 1 running, 164 sleeping, 0 stopped, 18 zombie Cpu(s): 1.9% user,\u2026","rel":"","context":"En \u00abSin categor\u00eda\u00bb","block_context":{"text":"Sin categor\u00eda","link":"https:\/\/blografia.net\/vicm3\/category\/sin-categoria\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":179,"url":"https:\/\/blografia.net\/vicm3\/2005\/11\/at_home\/","url_meta":{"origin":556,"position":1},"title":"At home","author":"vicm3","date":"29 noviembre, 2005","format":false,"excerpt":"top - 19:18:50 up 59 days, 21:00, 1 user, load average: 0.00, 0.00, 0.00 Tasks: 75 total, 1 running, 74 sleeping, 0 stopped, 0 zombie Cpu(s): 0.7% user, 0.7% system, 0.0% nice, 98.7% idle Mem: 256724k total, 252124k used, 4600k free, 56092k buffers Swap: 265032k total, 39152k used, 225880k free,\u2026","rel":"","context":"En \u00abSin categor\u00eda\u00bb","block_context":{"text":"Sin categor\u00eda","link":"https:\/\/blografia.net\/vicm3\/category\/sin-categoria\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":669,"url":"https:\/\/blografia.net\/vicm3\/2009\/08\/un-servidor-de-correo-ocupado\/","url_meta":{"origin":556,"position":2},"title":"Un servidor de correo ocupado","author":"vicm3","date":"7 agosto, 2009","format":false,"excerpt":"top - 08:05:51 up 22 days, 18:23, 1 user, load average: 7.23, 3.74, 2.05 Tasks: 234 total, 1 running, 233 sleeping, 0 stopped, 0 zombie Cpu0 : 14.3%us, 0.8%sy, 0.0%ni, 83.0%id, 1.8%wa, 0.0%hi, 0.0%si, 0.0%st Cpu1 : 10.9%us, 1.2%sy, 0.0%ni, 86.5%id, 1.4%wa, 0.0%hi, 0.0%si, 0.0%st Cpu2 : 15.8%us, 1.4%sy, 0.0%ni,\u2026","rel":"","context":"En \u00abSin categor\u00eda\u00bb","block_context":{"text":"Sin categor\u00eda","link":"https:\/\/blografia.net\/vicm3\/category\/sin-categoria\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":417,"url":"https:\/\/blografia.net\/vicm3\/2007\/05\/lighttpd\/","url_meta":{"origin":556,"position":3},"title":"lighttpd","author":"vicm3","date":"1 mayo, 2007","format":false,"excerpt":"En algun momento estuve jugando con un vps con tan solo 64MB de memoria (58 usables) por lo que tuve que hacer varias cosas para poder hacer algo con el. Por ejemplo para usarlo como webserver remplace apache por lighttpd, intente con cherokee pero resulto que usa demasiada memoria (tendra\u2026","rel":"","context":"En \u00abSin categor\u00eda\u00bb","block_context":{"text":"Sin categor\u00eda","link":"https:\/\/blografia.net\/vicm3\/category\/sin-categoria\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":319,"url":"https:\/\/blografia.net\/vicm3\/2006\/07\/cuando_las_cosas_parecen_no_ir_bien\/","url_meta":{"origin":556,"position":4},"title":"Cuando las cosas parecen no ir bien","author":"vicm3","date":"11 julio, 2006","format":false,"excerpt":"Es probable que no lo esten... por alguna razon joomla no me termina de gustar como CMS, siento que tiene muchisimas opciones y los pocos templates que conozco no me agradan demasiado. Por otra parte siempre me ha parecido que tarda mucho en generar su pagina de inicio. Bien, el\u2026","rel":"","context":"En \u00abSin categor\u00eda\u00bb","block_context":{"text":"Sin categor\u00eda","link":"https:\/\/blografia.net\/vicm3\/category\/sin-categoria\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":528,"url":"https:\/\/blografia.net\/vicm3\/2008\/02\/eso-es-tener-un-mx-ocupado\/","url_meta":{"origin":556,"position":5},"title":"Eso es tener un MX ocupado","author":"vicm3","date":"22 febrero, 2008","format":false,"excerpt":"top - 13:47:31 up 50 days, 21:26, 2 users, load average: 8.05, 5.89, 3.30 Tasks: 197 total, 2 running, 194 sleeping, 0 stopped, 1 zombie Cpu0 : 51.7%us, 5.3%sy, 0.0%ni, 42.4%id, 0.7%wa, 0.0%hi, 0.0%si, 0.0%st Cpu1 : 46.2%us, 4.7%sy, 0.0%ni, 35.5%id, 13.3%wa, 0.0%hi, 0.3%si, 0.0%st Cpu2 : 50.7%us, 3.3%sy, 0.0%ni,\u2026","rel":"","context":"En \u00abSin categor\u00eda\u00bb","block_context":{"text":"Sin categor\u00eda","link":"https:\/\/blografia.net\/vicm3\/category\/sin-categoria\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"_links":{"self":[{"href":"https:\/\/blografia.net\/vicm3\/wp-json\/wp\/v2\/posts\/556","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blografia.net\/vicm3\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blografia.net\/vicm3\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blografia.net\/vicm3\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/blografia.net\/vicm3\/wp-json\/wp\/v2\/comments?post=556"}],"version-history":[{"count":0,"href":"https:\/\/blografia.net\/vicm3\/wp-json\/wp\/v2\/posts\/556\/revisions"}],"wp:attachment":[{"href":"https:\/\/blografia.net\/vicm3\/wp-json\/wp\/v2\/media?parent=556"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blografia.net\/vicm3\/wp-json\/wp\/v2\/categories?post=556"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blografia.net\/vicm3\/wp-json\/wp\/v2\/tags?post=556"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}