{"id":103763,"date":"2022-04-12T03:37:17","date_gmt":"2022-04-12T01:37:17","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-sistemy-upravleniya-kontejnerami-lxd-5-0"},"modified":"2022-04-12T03:37:17","modified_gmt":"2022-04-12T01:37:17","slug":"vypusk-sistemy-upravleniya-kontejnerami-lxd-5-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/vypusk-sistemy-upravleniya-kontejnerami-lxd-5-0","title":{"rendered":"Megjelent az LXD 5.0 kont\u00e9nerkezel\u0151 rendszer.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>A Canonical k\u00f6zz\u00e9tette az LXD 5.0 kont\u00e9nerkezel\u0151 \u00e9s az LXCFS 5.0 virtu\u00e1lis f\u00e1jlrendszer kiad\u00e1s\u00e1t. Az LXD k\u00f3dja Go nyelven \u00edr\u00f3dott, \u00e9s Apache 2.0 licensz alatt terjesztik. Az 5.0 \u00e1g a hossz\u00fa t\u00e1v\u00fa t\u00e1mogat\u00e1s\u00fa kiad\u00e1sokhoz tartozik \u2014 a friss\u00edt\u00e9sek 2027 j\u00fanius\u00e1ig fognak megjelenni.       <\/p>\n<p>A kont\u00e9nerek futtat\u00e1s\u00e1hoz az LXC eszk\u00f6zk\u00e9szlet biztos\u00edt runtime-ot, amely tartalmazza a liblxc k\u00f6nyvt\u00e1rat, a kont\u00e9nerek l\u00e9trehoz\u00e1s\u00e1hoz sz\u00fcks\u00e9ges eszk\u00f6z\u00f6ket (lxc-create, lxc-start, lxc-stop, lxc-ls stb.), kont\u00e9ner sablonokat \u00e9s k\u00fcl\u00f6nf\u00e9le programoz\u00e1si nyelvekhez sz\u00fcks\u00e9ges k\u00f6t\u0151d\u00e9seket. Az elszigetel\u00e9s a Linux kernel be\u00e9p\u00edtett mechanizmusain kereszt\u00fcl t\u00f6rt\u00e9nik. A folyamatok, h\u00e1l\u00f3zati stack, ipc, uts, felhaszn\u00e1l\u00f3i azonos\u00edt\u00f3k \u00e9s a csatlakoz\u00e1si pontok elszigetel\u00e9s\u00e9hez n\u00e9vt\u00e9r mechanizmusokat (namespaces) haszn\u00e1lnak. Az er\u0151forr\u00e1sok korl\u00e1toz\u00e1s\u00e1hoz cgroups alkalmazhat\u00f3k. A jogosults\u00e1gok cs\u00f6kkent\u00e9s\u00e9re \u00e9s a hozz\u00e1f\u00e9r\u00e9s korl\u00e1toz\u00e1s\u00e1ra az Apparmor \u00e9s SELinux profilokat, Seccomp politik\u00e1kat, Chroots (pivot_root) \u00e9s k\u00e9pess\u00e9geket haszn\u00e1lnak.    <\/p>\n<p>A LXC mellett a LXD a CRIU \u00e9s QEMU projektek komponenseit is alkalmazza. M\u00edg az LXC alacsony szint\u0171 eszk\u00f6zk\u00e9nt szolg\u00e1l az egyes kont\u00e9nerek szintj\u00e9n val\u00f3 manipul\u00e1ci\u00f3hoz, a LXD eszk\u00f6z\u00f6ket biztos\u00edt a t\u00f6bbkont\u00e9neres klaszterek k\u00f6zpontos\u00edtott kezel\u00e9s\u00e9hez. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/hu\/server\/\"   title=\"szerverek\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1640\">szerverek<\/a>. A LXD h\u00e1tt\u00e9rfolyamatk\u00e9nt val\u00f3sul meg, amely k\u00e9pes a h\u00e1l\u00f3zaton kereszt\u00fcl REST API-n kereszt\u00fcl fogadni a k\u00e9relmeket, \u00e9s k\u00fcl\u00f6nb\u00f6z\u0151 t\u00e1rol\u00e1si backend-eket (k\u00f6nyvt\u00e1rfa, ZFS, Btrfs, LVM) t\u00e1mogat. Lehet\u0151s\u00e9get biztos\u00edt pillanatfelv\u00e9telek k\u00e9sz\u00edt\u00e9s\u00e9re, \u00e9l\u0151 migr\u00e1ci\u00f3ra az akt\u00edv kont\u00e9nerek k\u00f6z\u00f6tt egyik g\u00e9pr\u0151l a m\u00e1sikra, valamint a kont\u00e9nerk\u00e9pek t\u00e1rol\u00e1s\u00e1ra. Az LXCFS a kont\u00e9nerekben a \/proc \u00e9s \/sys pseudo-f\u00e1jlrendszer szimul\u00e1l\u00e1s\u00e1ra szolg\u00e1l, valamint a cgroupfs virtualiz\u00e1lt megjelen\u00edt\u00e9s\u00e9re, hogy a kont\u00e9nerek norm\u00e1l, f\u00fcggetlen rendszernek t\u0171njenek.      <\/p>\n<p>F\u0151bb fejleszt\u00e9sek:  <\/p>\n<ul>\n<li class=\"l\"> Lehet\u0151s\u00e9g ny\u00edlik lemezek \u00e9s USB-eszk\u00f6z\u00f6k forr\u00f3 csatlakoztat\u00e1s\u00e1ra vagy lecsatlakoztat\u00e1s\u00e1ra. A virtu\u00e1lis g\u00e9pben az \u00faj lemez egy \u00faj eszk\u00f6z megjelen\u00e9se r\u00e9v\u00e9n az SCSI buszon j\u00f6n l\u00e9tre, m\u00edg az USB-eszk\u00f6z USB hotplug esem\u00e9ny gener\u00e1l\u00e1s\u00e1val azonos\u00edthat\u00f3.\n<li class=\"l\"> Lehet\u0151v\u00e9 v\u00e1lt az LXD elind\u00edt\u00e1sa olyan k\u00f6r\u00fclm\u00e9nyek k\u00f6z\u00f6tt is, amikor a h\u00e1l\u00f3zati kapcsolat l\u00e9trehoz\u00e1sa nem lehets\u00e9ges, p\u00e9ld\u00e1ul a sz\u00fcks\u00e9ges h\u00e1l\u00f3zati eszk\u00f6z hi\u00e1nya miatt. Hibajelz\u00e9s helyett az LXD most az aktu\u00e1lis k\u00f6r\u00fclm\u00e9nyek k\u00f6z\u00f6tt el\u00e9rhet\u0151 maxim\u00e1lis sz\u00e1m\u00fa k\u00f6rnyezetet ind\u00edt el, a t\u00f6bbi k\u00f6rnyezet pedig akkor indul el, amikor a h\u00e1l\u00f3zati kapcsolat helyre\u00e1llt.\n<li class=\"l\"> \u00daj szerepk\u00f6r ker\u00fclt bevezet\u00e9sre a klasztertagoz\u00f3k sz\u00e1m\u00e1ra \u2014 ovn-chassis, amely az OVN (Open Virtual Network) haszn\u00e1lat\u00e1ra szolg\u00e1l a h\u00e1l\u00f3zati kommunik\u00e1ci\u00f3hoz (az ovn-chassis szerepk\u00f6r hozz\u00e1rendel\u00e9s\u00e9vel a szerverek az OVN ir\u00e1ny\u00edt\u00f3 funkci\u00f3inak v\u00e9grehajt\u00e1s\u00e1ra k\u00fcl\u00f6n\u00edthet\u0151k el).\n<li class=\"l\"> Javasolt egy optimaliz\u00e1lt m\u00f3dszert a t\u00e1rol\u00e1si szekci\u00f3k tartalm\u00e1nak friss\u00edt\u00e9s\u00e9re. Az el\u0151z\u0151 verzi\u00f3kban a friss\u00edt\u00e9s l\u00e9nyege az volt, hogy el\u0151sz\u00f6r a t\u00e1rol\u00f3 p\u00e9ld\u00e1ny\u00e1t vagy a szakaszt m\u00e1solt\u00e1k, p\u00e9ld\u00e1ul a zfs vagy btrfs send\/receive funkci\u00f3j\u00e1nak alkalmaz\u00e1s\u00e1val, majd a l\u00e9trehozott m\u00e1solatot az rsync program futtat\u00e1s\u00e1val szinkroniz\u00e1lt\u00e1k. A friss\u00edt\u00e9s hat\u00e9konys\u00e1g\u00e1nak n\u00f6vel\u00e9se \u00e9rdek\u00e9ben <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/hu\/vps\/\"   title=\"virtu\u00e1lis g\u00e9pekhez\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2093\">virtu\u00e1lis g\u00e9pekhez<\/a> az \u00faj verzi\u00f3ban egy fejlettebb migr\u00e1ci\u00f3s logika ker\u00fclt alkalmaz\u00e1sra, ahol ha a forr\u00e1s- \u00e9s a c\u00e9lkiszolg\u00e1l\u00f3 egy t\u00e1rol\u00f3medenc\u00e9t haszn\u00e1l, akkor az rsync helyett automatikusan pillanatk\u00e9pek \u00e9s send\/receive m\u0171veletek ker\u00fclnek alkalmaz\u00e1sra.\n<li class=\"l\"> \u00c1tdolgozva lett a cloud-init k\u00f6rnyezetek azonos\u00edt\u00e1s\u00e1nak logik\u00e1ja: az instance-id szerep\u00e9ben a k\u00f6rnyezet nev\u00e9nek helyett most UUID-t haszn\u00e1lnak.\n<li class=\"l\"> Hozz\u00e1adva a sched_setscheduler rendszerh\u00edv\u00e1s elfog\u00e1s\u00e1nak t\u00e1mogat\u00e1sa, amely lehet\u0151v\u00e9 teszi a nem privilegiz\u00e1lt t\u00e1rol\u00f3knak a folyamatok priorit\u00e1s\u00e1nak megv\u00e1ltoztat\u00e1s\u00e1t.\n<li class=\"l\"> Megval\u00f3s\u00edtva a lvm.thinpool_metadata_size opci\u00f3, amely a thinpool metadatainak m\u00e9ret\u00e9t kezeli.\n<li class=\"l\"> \u00c1tdolgozva lett a lxc h\u00e1l\u00f3zati inform\u00e1ci\u00f3kat tartalmaz\u00f3 f\u00e1jlform\u00e1tuma. T\u00e1mogat\u00e1s ker\u00fclt bevezet\u00e9sre az interf\u00e9szek, h\u00e1l\u00f3zati hidak, VLAN \u00e9s OVN h\u00e1l\u00f3zatok \u00f6sszekapcsol\u00e1si adataihoz.\n<li class=\"l\"> N\u00f6velve lettek a minim\u00e1lis alkatr\u00e9szverzi\u00f3kra vonatkoz\u00f3 k\u00f6vetelm\u00e9nyek: Linux kernel 5.4, Go 1.18, LXC 4.0.x \u00e9s QEMU 6.0.\n<li class=\"l\"> Az LXCFS 5-ben bevezet\u00e9sre ker\u00fclt az egys\u00e9ges\u00edtett cgroup hierarchia (cgroup2) t\u00e1mogat\u00e1sa, valamint a \/proc\/slabinfo \u00e9s \/sys\/devices\/system\/cpu, az \u00f6sszeszerel\u00e9shez a meson eszk\u00f6zk\u00e9szlete ker\u00fclt felhaszn\u00e1l\u00e1sra.      <\/ul>\n<p>Forr\u00e1s: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=57006\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Canonical \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b\u0430 \u0440\u0435\u043b\u0438\u0437 \u043c\u0435\u043d\u0435\u0434\u0436\u0435\u0440\u0430 \u043a\u043e\u043d\u0442\u0435\u0439\u043d\u0435\u0440\u043e\u0432 LXD 5.0 \u0438 \u0432\u0438\u0440\u0442\u0443\u0430\u043b\u044c\u043d\u043e\u0439 \u0424\u0421 LXCFS 5.0. \u041a\u043e\u0434 LXD \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 Go \u0438 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 Apache 2.0. \u0412\u0435\u0442\u043a\u0430 5.0 \u043e\u0442\u043d\u0435\u0441\u0435\u043d\u0430 \u043a \u0432\u044b\u043f\u0443\u0441\u043a\u0430\u043c \u0441 \u0434\u043b\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0439 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u043e\u0439 &#8212; 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