2023學(xué)年完整公開(kāi)課版Ceph運(yùn)維2

Ceph運(yùn)維22Ceph運(yùn)維-monsystemctlstatusceph-mon@ceph01.servicesystemctlenableceph-mon@ceph02.servicecephmonstatcephdaemonmon.ceph01help3Ceph運(yùn)維-osdcephosdtreesystemctlstatusceph-osd@{0..2}.servicecephosdstatcephdaemonosd.0helpcephdaemonosd.0status##OSD權(quán)重設(shè)定cephosdcrushset26.0host=ceph01##OSD.2權(quán)重為6##CRUSH在選擇OSD時(shí)，如果發(fā)現(xiàn)weight為0，就跳過(guò)該OSD。cephosdmapimagesceph4Ceph運(yùn)維-osdweight權(quán)重和磁盤(pán)的容量有關(guān)，一般1T，值為1.000,500G就是0.51T=120G=0.02其和磁盤(pán)的容量有關(guān)系，不因磁盤(pán)可用空間的減少而變化,其可以通過(guò)以下命令設(shè)置cephosdcrushreweightosd.90.2Reweight是一個(gè)0到1之間的值，可以用以下命令設(shè)置，cephosdreweight91當(dāng)reweight改變時(shí)，weight值并不會(huì)變化。它影響PG的到OSD的映射關(guān)系。Reweight參數(shù)的目的，由于ceph的CRUSH算法隨機(jī)分配，是概率統(tǒng)計(jì)意義上的數(shù)據(jù)均衡，當(dāng)小規(guī)模集群，pg數(shù)據(jù)相對(duì)較少時(shí)，會(huì)產(chǎn)生一些不均勻的情況，通過(guò)調(diào)整reweight參數(shù)，達(dá)到數(shù)據(jù)均衡。需要注意的是，這個(gè)參數(shù)不會(huì)持久化，當(dāng)該osdout時(shí)，reweight的值為0，當(dāng)該osd重新up時(shí)，該值會(huì)恢復(fù)到1，而不會(huì)保持之前修改過(guò)的值5Ceph運(yùn)維-pg查看PG狀態(tài)cephpgstatcephpgdumpcephosdmapimagesceph01cephosdmapvolumesceph016Ceph運(yùn)維-pool新建刪除存儲(chǔ)池cephosdpoollscephosdpoolrmvolumesvolumes--yes-i-really-really-mean-itcephosdpoolrmimagesimages--yes-i-really-really-mean-itcephosdpoolcreatevolumes128cephosdpoolcreateimages128cephosdpoolsetvolumessize1cephosdpoolsetimagessize1cephosdpoolset