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Title:霐旍氍鸽嫹雱 - [RHEL] Red Hat Enterprise Linux Clustering瓿 High-Availability鞚 Quorum Disk 甑劚 斓滌爜頇
Description:f:aboutblog412 dc:identifierblog412 dc:title[RHEL] Red Hat Enterprise Linux Clustering瓿 High-Availability鞚 Quorum Disk 甑劚 斓滌爜頇 trackback:pinghttp:www.digimoon.netblogtrackback412
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霐旍氍鸽嫹雱 - [RHEL] Red Hat Enterprise Linux Clustering瓿 High-Availability鞚 Quorum Disk 甑劚 斓滌爜頇
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[RHEL] Red Hat Enterprise Linux Clustering瓿 High-Availability鞚 Quorum Disk 甑劚 斓滌爜頇
[霐旍氍, 2014/07/15 07:44, PC 韮愱惮/毽垍鞀
鞗愲 毵來伂:https://access.redhat.com/articles/216443氩堨棴氍胳劀 雼れ毚搿滊摐:http://www.digimoon.net/docs/20140714-氩堨棴-How to Optimally Configure a Quorum Disk in Red Hat Enterprise Linux Clustering and High-Availability Environments-by_mky.pdf
Red Hat Enterprise Linux Clustering瓿糎igh-Availability鞚 Quorum Disk 甑劚 斓滌爜頇旍爛鞛: John Ruemker and Lon Hohberger韼胳: Allison Pranger05/18/2011氩堨棴: 銏滊Μ雸呾姢雿办澊韮鞁滌姢韰 氍戈步鞙07/14/2014臧滌殧韥措煬鞀ろ劙鞐愲姅 quorum disk 於旉皜 鞐秬毳 韺愲嫧頃橁赴 鞙勴暣 彀戈碃頃挫暭 頃 欷戩殧 鞖旍唽霌れ澊 臁挫灛頃╇媹雼. 雽攵攵勳潣 瓴届毎, QDisk電 頃勳垬鞝侅澊歆 鞎婌溂氅 Qdisk電 攵鞝曧檿頃 靹疙寘鞙茧 鞚疙暅 鞓堦赴旃 氇豁暅 瓴瓣臣臧 雮橃槵 臧電レ劚鞚 歃濌皜鞁滍偆氅挫劀 甑劚鞚 氤奠灐頃橁矊 毵岆摐電 雿办棎 鞚检“頃 靾 鞛堨姷雼堧嫟. 鞚 氍胳劀電 頊措Μ鞀ろ嫳瓿 氅韹绊尐鞀るゼ 鞙勴暅 靹疙寘鞚 韽暔頃橂姅 QDisk鞕 QDisk 靹疙寘 斓滌爜頇 氚╈晥鞐 雽頃 臧鞛 鞚茧皹鞝侅澑 靷毄 靷毳 旮办垹頃橁碃 鞛堨姷雼堧嫟. 雿 毵庫潃 鞝曤炒電 鞎勲灅毳 彀戈碃頃橃嫮鞁滌槫:鈥 Official Product Documentation (for both Red Hat Enterprise Linux 5 and Red Hat Enterprise Linux 6)鈥 Cluster Administration鈥 Cluster Suite Overview鈥 man qdisk鈥 man cman鈥 man cluster.conf鈥 man openais.conf頇橁步鈥 Red Hat Enterprise Linux 5+ Advanced Platform (Clustering and GFS/GFS2)鈥 Red Hat Enterprise Linux 6+ with the High Availability Add-On or Resilient Storage Add-OnQDISK 靷毄 靷雼れ潓鞚 QDisk毳 鞙勴暅 鞝勴槙鞝侅澑 靷毄 靷霌れ瀰雼堧嫟. 氇囯獓 靷鞐愳劀, 鞗愴晿電 瓴瓣臣毳 雼劚頃橁赴 鞙勴暅 靹犿儩靷暛霌れ澊 鞝滉车霅╇媹雼.韥措煬鞀ろ劙 heartbeat瓿 Fencing鞚 鞙勴晿鞐 攵勲Μ霅 雱ろ姼鞗岉伂毳 臧栯姅 2雲鸽摐 韥措煬鞀ろ劙2雲鸽摐 韥措煬鞀ろ劙電 氤胳鞝侅溂搿 霊 靷澊鞚 韱奠嫚鞚 雭婌柎臁岇潉 霑 雲鸽摐霌れ澊 臧侅瀽 韥措煬鞀ろ劙鞚 鞙犾澕頃 雮潃 氅る矂霛缄碃 鞀れ姢搿 臧勳<頃橂姅 split-brain 鞁滊倶毽槫鞐 旆暯頃╇媹雼. 雲鸽摐臧 韥措煬鞀ろ劙搿滊秬韯 鞝滉卑霅橃柎鞎 頃橂姅 瓴冹棎 霃欖潣頃 氇╈爜鞙茧 攴 雲鸽摐霌れ潃 韱奠嫚頃 靾 鞐嗞赴 霑岆鞐, 霊 雲鸽摐 氇憪 韼滌嫳鞚 韱淀暣 雼るジ 瓴冹潉 鞝滉卑 鞁滊弰頃 瓴冹瀰雼堧嫟. 霊 順胳姢韸戈皜 靹滊 霃欖嫓鞐 韼滌嫳 鞁滊弰頃橂姅 順勳儊鞚 "fence race"霛 頃╇媹雼. 韥措煬鞀ろ劙 韱奠嫚鞖╈溂搿 靷毄頃橂姅 雱ろ姼鞗岉伂鞕 霃欖澕 雱ろ姼鞗岉伂 靸侅棎 fence 鞛レ箻臧 鞐瓣舶霅 鞝勴槙鞝侅澑 頇橁步鞐愳劀 fence race臧 鞚检柎雮 氍胳牅電 鞐嗢姷雼堧嫟. 鞕滊儛頃橂┐ 雱ろ姼鞗岉伂 鞐瓣舶鞚 鞛冹潃 攴 雲鸽摐電 雼るジ 雲鸽摐毳 fence 頃 靾 鞐嗞碃 攴鸽煬氙搿 race毳 鞛冹潉 瓴冹澊旮 霑岆鞛呺媹雼. 鞚茧秬 瓿奠湢 韼滌嫳 鞛レ箻電 鞎§劯鞀るゼ 歆侂牞頇旐暕雼堧嫟. 鞚措姅 鞓れ 頃橂倶鞚 順胳姢韸鸽鞚 靹标车頃 靾 鞛堨潓鞚 鞚橂頃╇媹雼. 攴鸽煬雮 雲鸽摐 雼 頃橂倶鞚 韼滌嫳 鞛レ箻臧 鞛堦碃 攴 鞛レ箻臧 韥措煬鞀ろ劙 韱奠嫚鞖╈溂搿 靷毄霅橃 鞎婋姅 雱ろ姼鞗岉伂毳 韱淀暣 鞎§劯鞀る悳雼る┐, 氇摖 順胳姢韸戈皜 韼滌嫳 毽橃姢韸鸽ゼ 霃欖嫓鞐 氤措偧 鞛犾灛靹膘澊 臁挫灛頃╇媹雼. 鞚 瓴瓣臣電 "fence death"霛 頃橂姅雿 鞚措姅 韥措煬鞀ろ劙鞚 氇摖 雲鸽摐臧 power off霅橂姅 瓴冹瀰雼堧嫟.QDisk電 頊措Μ鞀ろ嫳 霕愲姅 automatic master-wins mechanism鞙茧 靸濎〈鞚 鞙犾鞁滍偓 雲鸽摐毳 氙鸽Μ 瓴办爼頃橂姅 氚╇矔鞚 鞃劀 鞚 靸來櫓鞐愳劀 fence race毳 觳橂Μ頃 靾 鞛堨姷雼堧嫟. 攴鸽煬雮 Red Hat Enterprise Linux 5.6 鞚挫儊, Red Hat Enterprise Linux 6.1 鞚挫儊 氩勳爠鞐愳劀 Red Hat鞚 fencing agent鞚 delay 鞓奠厴鞚 雽鞁 靷毄頃 瓴冹潉 甓岇灔頃╇媹雼. 欤检柎歆 fencing 鞐愳澊鞝勴姼鞕 雿旊秷鞏 delay 鞓奠厴 靷毄鞚 fence race鞐 甑劚 旮半皹鞚 winner毳 鞝曥潣頃橁碃 鞚措姅 quorum disk氤措嫟 甑劚鞚 雼垳頃╇媹雼.鞚 頇橁步鞐愳劀, QDisk電 鞓れ 2雲鸽摐 韥措煬鞀ろ劙鞐愳劀毵 鞚检柎雮橂姅 "fencing loops"搿 鞎岆牑歆 氍胳牅毳 鞓堧癌頃 靾 鞛堨姷雼堧嫟. fencing loops電 韥措煬鞀ろ劙 雲鸽摐臧 韼滌嫳 頉 毽稉霅橃棃鞙茧倶 韥措煬鞀ろ劙 雮措秬鞐瓣舶鞚 鞐爠頌 鞎 霅橁赴 霑岆鞐 韥措煬鞀ろ劙 雲鸽摐臧 韥措煬鞀ろ劙鞐 rejoin 頃 靾 鞐嗠姅 霑岇棎 氚滌儩頃╇媹雼. 攴鸽煬瓿 雮橃劀 靸濎〈 雲鸽摐毳 韼滌嫳頃橁碃 毽稉霅橂姅 瓿检爼鞚 氍错暅氚橂车霅╇媹雼. fencing loops 鞓堧癌鞚 鞙勴暅 雽鞎堨潃 chkconfig utility毳 靷毄頃橃棳 攵韺 鞁 韥措煬鞀ろ劙 靻岉攧韸胳洦鞏措ゼ 牍勴櫆靹膘嫓韨る姅 瓴冹瀰雼堧嫟."Last Man Standing" 旮半姤鞚 鞖旉惮頃橂姅 韥措煬鞀ろ劙霃欖瀾 鞙犾毳 鞙勴暣, Red Hat Enterprise Linux 瓿犼皜鞖╈劚 韥措煬鞀ろ劙電 頇曥嫟頃 臧滌垬鞚 氅る矂 臁挫灛毳 鞖旉惮頃╇媹雼. 韥措煬鞀ろ劙臧 quorum(鞝曥”靾)毳 臧栮赴 鞙勴暣靹滊姅 鞝勳泊 vote 靾橃潣 鞝堧皹氤措嫟 毵庫潃 靾橁皜 臁挫灛頃挫暭 頃╇媹雼. 鞝堧皹氤措嫟 鞝侅潃 瓴届毎, 韥措煬鞀ろ劙電 欷戨嫧霅 瓴冹澊氅 氇摖 韥措煬鞀ろ劙 霃欖瀾鞚 quorum鞚 雼れ嫓 須嶋摑霅 霑岅箤歆 halt霅 瓴冹瀰雼堧嫟.鞝曥爠鞚 項堨毄霅橃 鞎婋姅 鞚茧秬 氙胳厴 韥Μ韹办滑頃 頇橁步鞐愳劀 雼轨嫚鞚 雽攵攵勳潣 雲鸽摐臧 雿 鞚挫儊 氅る矂臧 鞎勲媽 靹彪姤鞝頃 靸來儨鞐愳劀霃 韥措煬鞀ろ劙臧 瓿勳啀霅橁赴毳 鞗愴暊 瓴冹瀰雼堧嫟. 炜茧熂鞚 鞙勴暅 韱奠儊 鞖旉惮霅橂姅 雲鸽摐 靾橂炒雼 雿 鞝侅潃 靾橃潣 雲鸽摐搿滊弰 韥措煬鞀ろ劙臧 鞝曥”靾橂ゼ 鞙犾頃 靾 鞛堧弰搿 頃橂姅, 膦呾 "last man standing"鞚措澕 攵堧Μ電 甑劚鞚 QDisk電 項堨毄頃╇媹雼.鞚 甑劚鞚 霃勳瀰 鞁 1彀爜鞚 鞎届爯鞚 靾橂鞚 旒鞚挫姢鞐愳劀 雮橅儉雮橂姅雿, 鞙犾澕頃 靸濎〈 雲鸽摐電 鞛レ嫓臧 靹彪姤 鞝頃橂ゼ 鞚检溂韨る┌ 搿滊摐毳 鞝侅爤頌 頃鸽摛頃 靾 鞐嗠嫟電 瓴冹瀰雼堧嫟.靹滊箘鞀 靻岇湢 雲鸽摐鞐愱矊 鞖办劆甓岇潉 攵鞐晿電 鞛愱博鞚 鞖旉惮頃橂姅 韥措煬鞀ろ劙韥措煬鞀ろ劙 雲鸽摐 韱奠嫚鞚 雭婌柎歆 瓴届毎, 雲鸽摐臧 靹滊箘鞀るゼ 鞁ろ枆 欷戩澑 瓴冴臣 臧欖潃 頇曥嫟頃 鞖旍澑鞐 攴缄卑頃橃棳 瓴办爼霅橂姅 氅る矂靿届潉 雼轨嫚鞚 鞗愴暊 靾 鞛堨姷雼堧嫟. QDisk電 鞚措ゼ 雲鸽摐 鞀れ綌鞏措ゼ 瓴办爼頃橂姅 鞀ろ伂毽巾姼毳 靷毄頃橂姅 頊措Μ鞀ろ嫳 靷毄鞚 韱淀晿鞐 鞝滉车頃╇媹雼.雲鸽摐 臧鞛(join) 氚 彀胳棳 鞛愱博鞚 鞖旉惮頃橂姅 韥措煬鞀ろ劙氇囯獓 頇橁步鞚 韥措煬鞀ろ劙鞐 join頃 靾 鞛堦赴 鞝 雲鸽摐臧 韸闺硠頃 鞖旉惮靷暛鞚 於╈”頃 瓴冹潉 頃勳殧搿 頃 靾 鞛堨姷雼堧嫟. 鞚 鞖旉惮靷暛鞚 旮办 於╈” 鞐秬毳 觳错伂頃橂姅 鞀ろ伂毽巾姼毳 鞁ろ枆頃橂姅 頊措Μ鞀ろ嫳 靷毄鞚 韱淀暣 鞁滍枆霅 靾 鞛堨姷雼堧嫟. 鞓堧ゼ 霌れ柎 韥措煬鞀ろ劙臧 1彀爜鞙茧 瓿犼皜鞖╈劚 靹滊箘鞀 鞖╇弰搿 靷毄霅橂姅 瓴届毎, 靹滊箘鞀 韸鸽灅頂届棎 鞚挫毄霅橂姅 雱ろ姼鞗岉伂毳 觳错伂頃橂姅 瓴冹潃 韥措煬鞀ろ劙 join鞚 鞙勴暅 頃勳殧臁瓣贝鞚 霅 靾 鞛堨姷雼堧嫟.QUORUM DISK 靹疙寘Qdisk電 甑劚頃橂嫟氤措┐ 氤奠灐頃挫 靾 鞛堨溂氙搿, 鞎勲灅鞚 頃勳垬靷暛鞚 瓿犽牑頃挫暭 頃╇媹雼. quorum disk 靷毄鞚 瓿奠湢 鞀ろ啝毽鞐 雽頃 霃欖嫓靹, 霃欔赴靹, 鞁れ嫓臧 鞝戧芳靹膘潉 頃勳殧搿 頃╇媹雼. 雽攵攵勳潣 SAN 鞀ろ啝毽 鞏措爤鞚搓皜 毵岇”霅╇媹雼. 雼轨嫚鞚 QDisk 韮鞚措皪鞚 氅韹绊尐鞀 鞛レ暊氤店惮毳 項堨毄頃挫暭 頃棎 鞙犾潣頃橃嫮鞁滌槫.鈥 QDisk電 韼滌嫳鞚 雽觳挫牅臧 鞎勲媹氙搿 QDisk 靷毄 鞁滌棓 I/O 韼滌嫳鞚 頃勳殧頃╇媹雼. 雲鸽摐霌れ澊 鞝侅嫓鞐 QDisk 鞐呺嵃鞚错姼毳 欷戩頃 霑 QDisk 雿半鞚 韥措煬鞀ろ劙搿滊秬韯 雲鸽摐毳 鞝滉卑頃橁赴 鞙勴暣 韥措煬鞀ろ劙 韼滌嫳 氅旍护雼堨鞚 靷毄頃╇媹雼.鈥 quorum disk搿 靷毄霅橂姅 LUN鞐 deadline scheduler毳 靷毄頃 瓴冹潉 Red Hat鞚 甓岇灔頃╇媹雼.鈥 氇摖 膦呺鞚 攵勳偘 霕愲姅 氤奠牅 鞀ろ啝毽 靸侂嫧鞐愳劀 QDisk毳 靷毄頃橂姅 瓴冹潃 歆鞗愲悩歆 鞎婌姷雼堧嫟.鈥 QDisk鞕 瓴绊暕霅橃柎 靷毄霅 鞁 multipath電 雿 旮 韥措煬鞀ろ劙 韮鞛勳晞鞗冹潉 鞖旉惮頃╇媹雼. (雿 毵庫潃 鞝曤炒毳 鞙勴暣 氅韹绊尐鞀 甑劚 靹れ爼鞚 彀戈碃頃橃嫮鞁滌槫.)QDisk鞕 CMAN 甑劚 靹れ爼Qdisk毳 靷毄頃橂姅 韥措煬鞀ろ劙 甑劚鞚 旮半掣 甑“電 鞎勲灅鞕 臧欖溂氅 靹れ爼 甓岇灔靷暛鞚 霐半雼堧嫟.NOTE: Red Hat Enterprise Linux 6.1攵韯半姅 毵庫潃 靹れ爼鞚 cluster.conf鞚 臧掛潉 旮办鞙茧 鞛愲彊 瓿勳偘霅╇媹雼. Red Hat Enterprise Linux 6.1 鞚挫儊鞐愳劀 雼轨嫚鞚 韥措煬鞀ろ劙毳 deploy頃滊嫟氅, 鞛愲彊 瓿勳偘 靹れ爼鞚 氤瓴巾晿旮 氤措嫟電 token timeout 鞕勳劚鞐 歆戩頃 瓴冹潉 Red Hat鞚 甓岇灔頃橂姅雿 鞚措姅 鞎勲灅 鞚错儰毽泊鞚 韺岆澕氙疙劙毳 韽暔頃╇媹雼. 霕愴暅 頊措Μ鞀ろ嫳 鞐嗠姅 2雲鸽摐 韥措煬鞀ろ劙 鞁ろ枆 鞁, master_wins 靻嶌劚鞚 qdiskd鞐 鞚橅暣 鞛愲彊 頇滌劚霅╇媹雼.
lt;cluster alias="mycluster" config_version="1" name="mycluster" gt; lt;clusternodes gt;
lt;!-- In Red Hat Enterprise Linux 6.1, votes is assumed to be 1 if not present. -- gt;
lt;clusternode name="node1.example.com" votes="1" nodeid="1" gt;
lt;fence gt;
lt;method name="1" gt;
lt;device name="node1-fence"/ gt;
lt;/method gt;
lt;/fence gt;
lt;/clusternode gt;
lt;clusternode name="node2.example.com" votes="1" nodeid="2" gt;
lt;fence gt;
lt;method name="1" gt;
lt;device name="node2-fence"/ gt;
lt;/method gt;
lt;/fence gt;
lt;/clusternode gt;
lt;/clusternodes gt;
lt;!-- In Red Hat Enterprise Linux 6.0 and later, the quorum_dev_poll parameter is automatically set to the token timeout and does not need to be set in cluster.conf. -- gt;
lt;cman expected_votes="3" quorum_dev_poll="21000"/ gt; lt;!-- In Red Hat Enterprise Linux 6.0 and later, master_wins is automatically enabled in two-node clusters when no heuristics are present. -- gt;
lt;!-- In Red Hat Enterprise Linux 6.1 and later, interval, tko, and votes are automatically calculated based on information already in cluster.conf. -- gt;
lt;quorumd label="myQDisk" interval="1" tko="10" min_score="1" votes="1" gt;
lt;!-- In Red Hat Enterprise Linux 5.6 and 6.0 (and later), the interval and tko values are automatically calculated based on the quorumd interval and tko values. -- gt;
lt;heuristic program="ping -c1 -w1 192.168.2.1" score="1" interval="2" tko="4" / gt;
lt;/quorumd gt;
lt;totem token="21000"/ gt;
lt;fencedevices gt;
[...]
lt;/fencedevices gt;
lt;/cluster gt;
鞚 靹れ爼鞚 甑劚頃 霑, 鞎勲灅鞚 甓岇灔靷暛鞚 瓿犽牑頃橃嫮鞁滌槫.鈥 totem token 臧掛潃 quorumd tko*interval 臧掛潣 2氚半炒雼 旎れ暭 頃╇媹雼. 鞙 鞓堨棎靹滊姅, quorumd電 10齑堨潣 tko*interval鞚 臧歆氙搿 totem token鞚 21000ms (21s)鞛呺媹雼. totem token 臧掛潃 quorumd interval 臧掙臣 臧欖潃 雼るジ 臧掛澊 seconds 雼渼鞚 瓴冴臣電 雼Μ milliseconds 雼渼鞛呺媹雼.鈥 CMAN鞚 quorum_dev_poll鞚 totem token瓿 臧欖晞鞎 頃╇媹雼.鈥 靷毄 欷戩澑 頊措Μ鞀ろ嫳鞚 tko*interval氤措嫟 雮卑雮 quorumd interval*(tko-1)瓿 霃欖澕頃挫暭 頃╇媹雼. 鞙 鞓堨棎靹, quorumd電 interval*(tko-1) 瓿奠嫕鞐 鞚橅暣 2*(2-1)=2鞚措┌ 2 seconds臧 heuristic(tko defaults電 1)鞚 鞙勴暅 interval搿 靹犿儩霅╇媹雼.鈥 cman tag毳 鞙勴暅 expected_votes 臧掛潃 齑 韥措煬鞀ろ劙 雲鸽摐 靾橃潣 2氚办棎靹 1鞚 牒 臧掙臣 臧欖晞鞎 頃╇媹雼.鈥 cman tag毳 鞙勴暅 two_node 臧掛潃 0鞚搓卑雮 臁挫灛頃橃 鞎婌晞鞎 頃╇媹雼.鈥 quorumd tag毳 鞙勴暅 vote 臧掛潃 齑 韥措煬鞀ろ劙 雲鸽摐 靾橃棎靹 1鞚 牒 臧掙臣 臧欖晞鞎 頃╇媹雼.鈥 臧 韥措煬鞀ろ劙 雲鸽摐電 1臧滌潣 vote毳 臧鞝胳暭 頃╇媹雼.Configuration Settings for Multipath韥措煬鞀ろ劙鞐愳劀 quorum鞚 氚涭硱欤缄赴 鞙勴暅 QDisk 靷毄 鞁, device-mapper-multipath電 鞐秳鞚 鞛レ箻 氤挫檮 鞖╇弰鞕 雼澕 歆鞝 鞛レ暊毳 頂柬晿旮 鞙勴暅 鞖╇弰搿 膦呾 鞙犾毄頃╇媹雼. 攴鸽煬雮 雼轨嫚鞚 氇囯獓 靹疙寘鞚 臁办爤頃 頃勳殧臧 鞛堨溂氙搿 QDisk鞕 CMAN鞚 雲鸽摐毳 鞝滉卑頃橁赴 鞝 雼るジ 瓴诫搿 鞛レ暊臁办箻頃橁赴 鞙勴暅 於╇秳頃 鞁滉皠鞚 氅韹绊尐鞀 鞛レ箻鞐 欷嶋媹雼.雽臧, 氅韹绊尐鞀 鞛レ箻毳 靷毄頃橂姅 韥措煬鞀ろ劙 靹れ爼鞚 鞙勴暅 2臧滌潣 鞝勲灥鞚 鞛堨姷雼堧嫟.鈥 鞛レ暊臁办箻 鞁滉皠 斓滌唽頇: 甑劚霅 靹滊箘鞀るゼ 霃欕摫頃橁矊 鞁ろ枆頃 靾 鞛堧姅 雼れ 雲鸽摐臧 鞛堦碃 雲鸽摐 鞛レ暊臧 鞚检柎雮潉 霑 毽唽鞀り皜 欷戩殧頃 霐滊爤鞚措倶 韼橂剱韹半ゼ 鞛呾 鞎婌潉 韥措煬鞀ろ劙毳 鞙勴暣, 雼轨嫚鞚 氅韹绊尐鞀 鞛レ箻臧 鞛レ暊臁办箻霅橁赴 鞙勴暅 雽旮半ゼ 鞗愴晿歆 鞎婌潉 瓴冹瀰雼堧嫟. 雽鞁, 雿 旮戈矊 旮半嫟霠れ劀 攴戈矁鞚 氤店惮頃 靾 鞛堧姅歆 鞐秬鞐 甏瓿勳梿鞚 雼轨嫚鞚 韥措煬鞀ろ劙 靹疙寘鞚 靹れ爼頃 靾 鞛堨溂氙搿 韥措煬鞀ろ劙電 臧電ロ暅 頃 牍犽ゴ瓴 雲鸽摐毳 鞛レ暊 觳橂Μ頃╇媹雼. 鞚措煱 韥措煬鞀ろ劙 膦呺毳 鞙勴暣, 雼轨嫚鞚 氅韹绊尐鞀 瓴诫毳 鞛レ暊臁办箻頃橂姅 雿办棎 鞏茧雮 鞁滉皠鞚 瓯鸽Μ電旍 鞚茧皹鞝侅溂搿 瓿犽牑頃 頃勳殧 鞐嗢姷雼堧嫟; QDisk鞕 韥措煬鞀ろ劙 靹疙寘鞚 鞚茧皹鞝侅溂搿 甑劚霅 靾 鞛堨姷雼堧嫟. (QDisk鞕 CMAN 靹轨厴鞚 鞙勴暅 頇橁步 靹れ爼鞚 氤挫嫮鞁滌槫) 毵岇暯 雲鸽摐鞚 鞀ろ啝毽臧 氍胳牅毳 氤挫澑雼る┐, 雲鸽摐電 quorumd interval * tko seconds毳 旮半嫟毽 霋 雼垳頃橁矊 鞝滉卑霅 瓴冹澊瓿, 韥措煬鞀ろ劙電 鞛戩梾鞚 雼れ嫓 鞁滌瀾頃 瓴冹瀰雼堧嫟.鈥 氤店惮 鞁滉皠 項堨毄: 氇囯獓 韥措煬鞀ろ劙鞐愳劀, 雲鸽摐 鞁ろ尐電 毵れ毎 靻愳嫟鞚 韥碃 攴戈矁鞚 鞛愲彊 氤店惮毳 牍犽ゴ瓴 頃橃棳 鞝曤Μ霅 霑岅箤歆 頂柬暣鞎 頃╇媹雼. 鞚 頇橁步鞐愳劀, 雼轨嫚鞚 甑劚鞚 臁办爤頃 靾 鞛堨溂氙搿 韥措煬鞀ろ劙電 雲鸽摐毳 鞝滉卑頃橁赴 鞝 multipath 鞛レ箻臧 雼るジ active 瓴诫搿 鞛レ暊臁办箻頃橁赴 鞙勴暅 於╇秳頃 鞁滉皠鞚 旮半嫟毽 瓴冹瀰雼堧嫟.鞀ろ啝毽 鞛レ箻臧 鞁ろ尐頃 靾 鞛堨溂氙搿 氅韹绊尐鞀 鞛レ暊臁办箻鞐 鞏茧雮 旮 斓滊寑鞁滉皠鞚 欷 瓴冹澑歆 雼轨嫚鞚 觳矆歆鸽 瓴办爼頃挫暭 頃╇媹雼. 氅韹绊尐鞀 鞛レ暊臁办箻 鞁滉皠鞚 臧 頇橁步鞐愳劀 氤瓴诫悹 靾 鞛堦碃, 攴鸽煬氙搿 攴戈矁鞚 雼るジ 鞁ろ尐 鞁滊倶毽槫 鞐嗢澊 鞝曥潣霅橁赴臧 靿毟 靾 鞐嗢姷雼堧嫟. 毵庫潃 靸來櫓鞐愳劀, 鞚 瓴诫 鞁ろ尐電 QDISK毳 鞙勴暅 鞏措枻 I/O 歆鞐办潉 頂柬晿氅挫劀 牍犽ゴ瓴 鞚检柎雮 靾 鞛堨姷雼堧嫟. 攴鸽煬雮 鞀ろ啝毽 韮瓴 霕愲姅 鞀れ渼旃橁皜 鞚戨嫷頃橃 鞎婋姅 雼るジ 靸來櫓鞐愳劀 I/O毳 雽旮绊晿電 霃欖晥 QDisk 韮鞚措皪鞚 鞎勳泝霅橂姅 瓴瓣臣毳 雮措┌ 雼るジ 瓴诫搿 鞛レ暊臁办箻 霅橁赴旯岇 靾 攵勳澊 瓯鸽Υ 靾 鞛堨姷雼堧嫟.鞚茧嫧 鞁ろ尐霅橂姅 雿 鞀ろ啝毽 鞛レ箻臧 鞊半姅 鞁滉皠鞚 鞝曧檿頃 鞚错暣毳 雼劚頃橂┐, QDisk 靹疙寘鞚 攴胳棎 霐半澕 臁办爼霅 靾 鞛堨姷雼堧嫟.鈥 毵岇暯 氅韹绊尐鞀 鞛レ箻臧 雼れ潓 頇滌劚 瓴诫搿 鞝勴櫂霅橂姅 雿办棎 頃儊 於╇秳頌 旮 鞁滉皠鞚 旮半嫟霠れ暭 頃滊嫟氅, quorumd settings interval * tko 瓿膘潃 氅韹绊尐鞀 鞛レ暊臁办箻 鞁滉皠氤措嫟 雿 韥 臧掛澊 霅橃柎鞎 頃╇媹雼.
lt;quorumd label="myqdisk" min_score="1" interval="2" tko="10" gt;
lt;heuristic [...] / gt;
lt;/quorumd gt;
鈥 totem token瓿 cman quorum_dev_poll 靹疙寘鞚 鞚 鞁犼窚 interval瓿 tko 靹疙寘鞐 旮办磮頃 QDisk鞕 CMAN 靹轨厴鞚 鞙勴暅 甑劚 靹れ爼 臧鞚措摐霛检澑鞚 靷毄頃橂┐靹 臁办爼霅橃柎鞎 頃╇媹雼.NOTE: Red Hat Enterprise Linux 5.5鞐愳劀, 韥措煬鞀ろ劙 鞛レ暊臁办箻 鞁滉皠鞚 氩勱犯 頂届姢:https://bugzilla.redhat.com/show_bug.cgi?id=544482 霑岆鞐 3 * token 歃濌皜頃 瓴冹瀰雼堧嫟. 毵岇暯 雼轨嫚鞚 totem token鞚 x * 2.7(x = multipath failover)搿 靹疙寘頃滊嫟氅, 韥措煬鞀ろ劙 鞛レ暊臁办箻 鞁滉皠鞚 鞎 x * 2.7 * 3鞚 霅 瓴冹瀰雼堧嫟. 鞚 瓴届毎, 韥措煬鞀ろ劙電 雲鸽摐毳 fence頃 瓴冹澊瓿 雲鸽摐毳 鞁ろ尐 頉 鞎 x * 2.7 * 3 鞁滌爯鞐 靹滊箘鞀るゼ 鞁滌瀾頃 瓴冹瀰雼堧嫟. 毵岇暯 x臧 30s霛茧┐, 韥措煬鞀ろ劙 鞛レ暊臁办箻 鞁滉皠鞚 30s x 2.7 x 3 = 243s gt; 4 minutes鞛呺媹雼. 雿 毵庫潃 鞝曤炒毳 鞙勴暣, 雼れ潓 旮办偓毳 彀戈碃頃橃嫮鞁滌槫: Why does it take so long (4+ minutes) before the other node is fenced in my Red Hat Enterprise Linux 5.5 cluster?Heuristics頊措Μ鞀ろ嫳鞚 雲鸽摐鞐 雽頃 須臣鞝侅澑 鞝來暕靹 瓴靷瀰雼堧嫟. 頊措Μ鞀ろ嫳鞚 氇摖 齑 鞀れ綌鞏 臧掛潃 頃粯 於旉皜霅橁碃, 毵岇暯 攴鸽摛鞚 斓滌唽 頃勳殧 鞀れ綌鞏措ゼ 毵岆倻雼る┐, 攴 雲鸽摐電 韥措煬鞀ろ劙鞐 彀戈皜毳 瓿勳啀頃╇媹雼. 毵岇暯 氇摖 鞀れ綌鞏挫潣 齑濏暕鞚 斓滌唽 鞀れ綌鞏 鞚错晿搿 霒柎歆勲嫟氅, 雲鸽摐電 韥措煬鞀ろ劙搿滊秬韯 鞛愳嫚鞚 鞝滉卑頃╇媹雼. (氤错喌 毽稉鞐 鞚橅暣)
鞎勲灅電 氇囯獓 氤错喌鞚 頊措Μ鞀ろ嫳瓿 靷毄 鞓堨瀰雼堧嫟.PingPing鞚 韥Μ韹办滑 雱ろ姼鞗岉伂 毽唽鞀れ棎 雿 鞚挫儊 鞝戧芳頃 靾 鞐嗢潉 霑 鞝勴槙鞝侅溂搿 韥措煬鞀ろ劙毳 鞝滉卑頃橁赴 鞙勴暣 靷毄霅╇媹雼. 鞓堧ゼ 霌る┐, 毵岇暯 韥措澕鞚挫柛韸 鞖旍箔鞚 192.168.2.1 鞏措摐霠堨姢鞕 頃粯 霛检毎韯半ゼ 韱淀暣 霌れ柎鞓嫟氅, 雼轨嫚鞚 霛检毎韯瓣皜 ping 觳橂Μ毳 頃 靾 鞛堧姅歆 鞐嗠姅歆 觳错伂頃橁赴 鞙勴暣 ping 頊措Μ鞀ろ嫳鞚 靷毄頃 靾 鞛堨姷雼堧嫟. 毵岇暯 霛检毎韯瓣皜 ping 觳橂Μ毳 頃 靾 鞐嗠嫟氅, 於旍浮頃橁贝雽 搿滌滑 鞁ろ枆 欷戩澑 鞏措枻 靹滊箘鞀る姅 韥措澕鞚挫柛韸鸽ゼ 靷毄頃 靾 鞐嗞碃, 雼轨嫚鞚 韥措煬鞀ろ劙搿滊秬韯 攴戈矁鞚 鞝滉卑頃 靾 鞛堨姷雼堧嫟.SAN 鞐瓣舶QDisk電 氇囯獓 頃稌鞝侅澑 鞀ろ啝毽 氇媹韯半鞚 鞝滉车頃╇媹雼. 鞓堧ゼ 霌る┐, 毵岇暯 順胳姢韸戈皜 臧戩瀽旮 quorum 霐旍姢韥棎 鞝戧芳頃 靾 鞐嗠嫟氅, 攴戈矁鞚 雼るジ 韥措煬鞀ろ劙 氅る矂鞐 鞚橅暣 韥措煬鞀ろ劙搿滊秬韯 鞝滉卑霅 瓴冹瀰雼堧嫟. 攴鸽煬雮, SAN 鞐瓣舶 頊措Μ鞀ろ嫳鞚 鞓れ quorum 霐旍姢韥 頄ロ晿電 瓴诫毵岇潉 氇媹韯绊暕雼堧嫟. 氇囯獓 旒鞚挫姢鞐愳劀, 瓴岆嫟臧 攴戈矁鞚 雼るジ 鞛レ箻毳 氇媹韯半頃橁赴 鞙勴暅 頊措Μ鞀ろ嫳鞚 臧栯姅 雿 鞙犾毄頃 靾 鞛堨姷雼堧嫟.雱ろ姼鞗岉伂 鞐瓣舶氇囯獓 頇橁步鞐愳劀, ping氤措嫟 頃橃渼 霠堧波鞐愳劀電 雱ろ姼鞗岉伂 鞐瓣舶 氇媹韯半鞚 鞚错暣頃橃 鞎婌潉 靾 鞛堨姷雼堧嫟. 雽鞁, 雼轨嫚鞚 Red Hat Enterprise Linux鞐 韽暔霅 韴挫潉 靷毄頃溂搿滌崹 鞙 霠堧波鞐愳劀 雱ろ姼鞗岉伂 鞐瓣舶鞚 氇媹韯半頃橁赴 鞙勴暅 頊措Μ鞀ろ嫳 靷毄鞚 鞗愴暊 靾 鞛堨姷雼堧嫟(鞓堧ゼ 霌る┐, 鞚措崝雱 霕愲姅 鞚疙敿雼堧按霌 毵來伂 靸來儨).REFERENCES AND RELATED DOCUMENTATION
鈥 Architecture Review Process for Red Hat Enterprise Linux High Availability, Cluster, and GFS鈥 Can I Change the I/O Scheduler for a Particular Disk Without the System Rebooting?鈥 Delaying Fencing in a Two-Node Cluster鈥 Is an EMC PowerPath-Managed LUN Supported for Use as a Quorum Device on Red Hat EnterpriseLinux Cluster and High Availability?鈥 Red Hat Enterprise Linux Cluster, High Availability, and GFS Deployment Best Practices鈥 Unresponsive Storage Device Leads to Excessive SCSI Recovery and device-mapper-multipathFailover Times in Red Hat Enterprise Linux鈥 device-mapper-multipath on Red Hat Enterprise Linux 5 Experiences Excessive Delay in Detecting a Lost Path from a Storage Failure that Produces No RSCN or Loop/Link Error鈥 How Can I Improve the Failover Time of a Faulty Path when Using device-mapper-multipath Over iSCSI?韥Μ鞐愳澊韹半笇 旎る歃 霛检澊靹检姢鞚 鞝鞛戨鞚 韥Μ鞐愳澊韹半笇 旎る歃 旖旊Μ鞎 鞝鞛戩瀽響滌嫓-牍勳榿毽-霃欖澕臁瓣贝氤瓴巾棃霛 2.0 雽頃滊甑 霛检澊靹检姢鞐 霐半澕 鞚挫毄頃橃嫟 靾 鞛堨姷雼堧嫟.
霐旍氍
2014/07/15 07:44
2014/07/15 07:44
automatic master-wins mechanism,
cluster,
cman,
failover,
fence,
heartbeat,
Heuristics,
High Availability,
interval,
multipath,
quorum,
RHCS,
split brain,
韥措煬鞀ろ劙,
頊措Μ鞀ろ嫳
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牍勲皜氚╇鞛 | 2014/08/08 23:47 | PERMALINK | EDIT/DEL | REPLY
甏毽瀽毵 氤 靾 鞛堧姅 雽撽竴鞛呺媹雼.
鞓ろ攬鞎勳澊霐旊 旮鞊瓣赴 [搿滉犯鞚竇[鞓ろ攬鞎勳澊霐旊瀫?]
鞚措/牍勲皜氩堩樃搿 旮鞊瓣赴
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