声明：本文转载自https://my.oschina.net/LastRitter/blog/1540124，转载目的在于传递更多信息，仅供学习交流之用。如有侵权行为，请联系我，我会及时删除。
在之前的测试中，sanlock的租约保存在NFS中（disk_lease_dir = "/var/lib/libvirt/sanlock"），并使用libvirt自动租约管理功能（auto_disk_leases=1），下面我们将尝试一些新的配置方法。
在libvirt与sanlock相关的配置和文档中并未找到可以把租约直接保存在共享存储中的方法，只有在使用自动租约管理时，可以配置租约位置的“disk_lease_dir”变量，不知是否可以通过修改这个配置为共享存储来自动把租约保存在共享存储上？如果可以，源码中必定会有相关的判断语句才对，因此进去探查一番。
分析一下libvirt对“disk_lease_dir”变量的解析。
$ tar xvf libvirt-1.3.4.tar.gz $ cd libvirt-1.3.4/ $ grep -rHn disk_lease_dir src/locking/test_libvirt_sanlock.aug.in:6:{ "disk_lease_dir" = "/var/lib/libvirt/sanlock" } src/locking/lock_driver_sanlock.c:134: p = virConfGetValue(conf, "disk_lease_dir"); src/locking/lock_driver_sanlock.c:135: CHECK_TYPE("disk_lease_dir", VIR_CONF_STRING); src/locking/libvirt_sanlock.aug:20: let entry = str_entry "disk_lease_dir" src/locking/sanlock.conf:34:#disk_lease_dir = "/var/lib/libvirt/sanlock" src/locking/sanlock.conf:40:# at 'disk_lease_dir' *MUST* be given a different host ID. src/locking/sanlock.conf:66:# content of disk_lease_dir) to make sure sanlock daemon can ChangeLog:80123: $ augtool get /files/etc/libvirt/qemu-sanlock.conf/disk_lease_dir ChangeLog:80124: /files/etc/libvirt/qemu-sanlock.conf/disk_lease_dir = /var/lib/libvirt/sanlock tools/virt-sanlock-cleanup.in:29:LOCKDIR=`augtool get '/files@sysconfdir@/libvirt/qemu-sanlock.conf/disk_lease_dir'` $ vi src/locking/lock_driver_sanlock.c ... static int virLockManagerSanlockLoadConfig(const char *configFile) { virConfPtr conf; virConfValuePtr p; char *tmp; ... p = virConfGetValue(conf, "auto_disk_leases"); CHECK_TYPE("auto_disk_leases", VIR_CONF_ULONG); if (p) driver->autoDiskLease = p->l; p = virConfGetValue(conf, "disk_lease_dir"); CHECK_TYPE("disk_lease_dir", VIR_CONF_STRING); if (p && p->str) { VIR_FREE(driver->autoDiskLeasePath); if (VIR_STRDUP(driver->autoDiskLeasePath, p->str) < 0) { virConfFree(conf); return -1; } } ... static int virLockManagerSanlockSetupLockspace(void) { int fd = -1; struct stat st; int rv; struct sanlk_lockspace ls; char *path = NULL; char *dir = NULL; int retries = LOCKSPACE_RETRIES; if (virAsprintf(&path, "%s/%s", driver->autoDiskLeasePath, VIR_LOCK_MANAGER_SANLOCK_AUTO_DISK_LOCKSPACE) < 0) goto error; ... if (stat(dir, &st) < 0 || !S_ISDIR(st.st_mode)) { virReportError(VIR_ERR_INTERNAL_ERROR, _("Unable to create lockspace %s: parent directory" " does not exist or is not a directory"), path); goto error; } ... 总结：
从源码简单分析来看，如果“disk_lease_dir”变量不是目录，便无法使用，没有自动区分是“共享存储”还是“NFS”的语句。
任选一个节点创建卷：
$ lvcreate -n sanlock -L 5G storage 在另外一个节点激活卷：
$ pvscan --cache $ lvchange -ay storage/sanlock $ augtool -s set /files/etc/libvirt/qemu-sanlock.conf/auto_disk_leases 1 $ augtool -s set /files/etc/libvirt/qemu-sanlock.conf/disk_lease_dir "/dev/storage/sanlock" $ systemctl restart libvirtd $ systemctl status libvirtd ● libvirtd.service - Virtualization daemon Loaded: loaded (/usr/lib/systemd/system/libvirtd.service; enabled; vendor preset: enabled) Active: inactive (dead) since 五 2017-04-21 18:45:56 CST; 1s ago Docs: man:libvirtd(8) http://libvirt.org Process: 59501 ExecStart=/usr/sbin/libvirtd $LIBVIRTD_ARGS (code=exited, status=0/SUCCESS) Main PID: 59501 (code=exited, status=0/SUCCESS) CGroup: /system.slice/libvirtd.service ├─12993 /sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf --leasefile-ro --dhcp-script=/usr/libexec/libvirt_leaseshelper └─12994 /sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf --leasefile-ro --dhcp-script=/usr/libexec/libvirt_leaseshelper 4月 21 18:45:56 Test2 systemd[1]: Starting Virtualization daemon... 4月 21 18:45:56 Test2 systemd[1]: Started Virtualization daemon. 4月 21 18:45:56 Test2 dnsmasq[12993]: read /etc/hosts - 6 addresses 4月 21 18:45:56 Test2 dnsmasq[12993]: read /var/lib/libvirt/dnsmasq/default.addnhosts - 0 addresses 4月 21 18:45:56 Test2 dnsmasq-dhcp[12993]: read /var/lib/libvirt/dnsmasq/default.hostsfile 4月 21 18:45:56 Test2 libvirtd[59501]: libvirt version: 2.0.0, package: 10.el7_3.5 (CentOS BuildSystem <http://bugs.centos.org>, 2017-03-0...tos.org) 4月 21 18:45:56 Test2 libvirtd[59501]: hostname: test2 4月 21 18:45:56 Test2 libvirtd[59501]: internal error: 无法生成锁空间 /dev/storage/sanlock/__LIBVIRT__DISKS__：上级目录不存在或者不是一个目录 4月 21 18:45:56 Test2 libvirtd[59501]: QEMU 的初始化状态驱动器失败：internal error: 无法生成锁空间 /dev/storage/sanlock/__LIBVIRT__DISKS__…是一个目录 4月 21 18:45:56 Test2 libvirtd[59501]: 驱动器状态初始化失败 这说明无法通过设置“disk_lease_dir”变量为一个卷来直接在共享存储上自动管理租约，与之前的源码分析结果一致。
$ augtool -s set /files/etc/libvirt/qemu-sanlock.conf/auto_disk_leases 0 $ augtool -s rm /files/etc/libvirt/qemu-sanlock.conf/disk_lease_dir $ augtool -s set /files/etc/libvirt/qemu-sanlock.conf/require_lease_for_disks 0 $ systemctl restart libvirtd $ systemctl status libvirtd ● libvirtd.service - Virtualization daemon Loaded: loaded (/usr/lib/systemd/system/libvirtd.service; enabled; vendor preset: enabled) Active: active (running) since 五 2017-04-21 19:00:03 CST; 5s ago Docs: man:libvirtd(8) http://libvirt.org Main PID: 60745 (libvirtd) CGroup: /system.slice/libvirtd.service ├─12993 /sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf --leasefile-ro --dhcp-script=/usr/libexec/libvirt_leaseshelper ├─12994 /sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf --leasefile-ro --dhcp-script=/usr/libexec/libvirt_leaseshelper └─60745 /usr/sbin/libvirtd 4月 21 19:00:03 Test2 systemd[1]: Starting Virtualization daemon... 4月 21 19:00:03 Test2 systemd[1]: Started Virtualization daemon. 4月 21 19:00:03 Test2 dnsmasq[12993]: read /etc/hosts - 6 addresses 4月 21 19:00:03 Test2 dnsmasq[12993]: read /var/lib/libvirt/dnsmasq/default.addnhosts - 0 addresses 4月 21 19:00:03 Test2 dnsmasq-dhcp[12993]: read /var/lib/libvirt/dnsmasq/default.hostsfile $ chown sanlock:sanlock /dev/mapper/raw $ sanlock direct init -s libvirt:0:/dev/mapper/raw:0 init done 0 $ sanlock direct init -r libvirt:test1:/dev/mapper/raw:1048576 两个节点分别使用不同的Host ID加入到Lockspace中（每次开机后都需要重新添加）。
$ sanlock client add_lockspace -s libvirt:1:/dev/mapper/raw:0 add_lockspace add_lockspace done 0 $ sanlock client status daemon 581e732d-e4b1-4216-8b2f-1a63f08bb28d.Test1 p -1 helper p -1 listener p -1 status s libvirt:1:/dev/mapper/raw:0 s __LIBVIRT__DISKS__:1:/var/lib/libvirt/sanlock/__LIBVIRT__DISKS__:0 $ sanlock client add_lockspace -s libvirt:2:/dev/mapper/raw:0 add_lockspace add_lockspace done 0 $ sanlock client status daemon b888aabb-0f5f-45ce-a310-ff8021f514fd.Test2 p -1 helper p -1 listener p -1 status s libvirt:2:/dev/mapper/raw:0 s __LIBVIRT__DISKS__:2:/var/lib/libvirt/sanlock/__LIBVIRT__DISKS__:0 $ sanlock direct dump /dev/mapper/raw offset lockspace resource timestamp own gen lver 00000000 libvirt 581e732d-e4b1-4216-8b2f-1a63f08bb28d.Test1 0000038190 0001 0001 00000512 libvirt b888aabb-0f5f-45ce-a310-ff8021f514fd.Test2 0000037427 0002 0001 01048576 libvirt test1 0000000000 0000 0000 0 在共享存储上创建一个卷来作为磁盘。
$ lvcreate -n test4_sanlock -L 5G storage $ dd if=cirros-0.3.4-x86_64-disk.img of=/dev/storage/test4_sanlock $ pvscan --cache $ lvchange -ay storage/test4_sanlock $ vi test4_sanlock.xml <domain type='kvm'> <name>test4_sanlock</name> <memory>262144</memory> <vcpu>1</vcpu> <os> <type arch='x86_64' machine='pc'>hvm</type> <boot dev='hd'/> </os> <devices> <disk type='file' device='disk'> <driver name='qemu' type='qcow2'/> <source file='/dev/storage/test4_sanlock'/> <target dev='hda' bus='ide'/> </disk> <lease> <lockspace>libvirt</lockspace> <key>test1</key> <target path='/dev/mapper/raw' offset='1048576'/> </lease> <input type='tablet' bus='usb'/> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='-1' listen = '0.0.0.0' autoport='yes' keymap='en-us'/> </devices> </domain> $ virsh define test4_sanlock.xml 定义域 test4_sanlock（从 test4_sanlock.xml） $ virsh list --all Id 名称 状态 ---------------------------------------------------- - test1_sanlock 关闭 - test2_sanlock 关闭 - test3_sanlock 关闭 - test4_sanlock 关闭 - test_sanlock 关闭 $ virsh start test4_sanlock 域 test4_sanlock 已开始 $ virsh list --all Id 名称 状态 ---------------------------------------------------- 2 test4_sanlock running - test1_sanlock 关闭 - test2_sanlock 关闭 - test3_sanlock 关闭 - test_sanlock 关闭 $ sanlock direct dump /dev/mapper/raw offset lockspace resource timestamp own gen lver 00000000 libvirt 581e732d-e4b1-4216-8b2f-1a63f08bb28d.Test1 0000040118 0001 0001 00000512 libvirt b888aabb-0f5f-45ce-a310-ff8021f514fd.Test2 0000039355 0002 0001 01048576 libvirt test1 0000040075 0001 0001 1 启动正常，资源test1所有者属于Host ID 1，即Test1节点。
$ virsh start test4_sanlock 错误：开始域 test4_sanlock 失败 错误：resource busy: 请求锁失败：错误 -243 $ virsh list --all Id 名称 状态 ---------------------------------------------------- - test1_sanlock 关闭 - test2_sanlock 关闭 - test3_sanlock 关闭 - test4_sanlock 关闭 - test_sanlock 关闭 $ sanlock direct dump /dev/mapper/raw offset lockspace resource timestamp own gen lver 00000000 libvirt 581e732d-e4b1-4216-8b2f-1a63f08bb28d.Test1 0000040200 0001 0001 00000512 libvirt b888aabb-0f5f-45ce-a310-ff8021f514fd.Test2 0000039437 0002 0001 01048576 libvirt test1 0000040075 0001 0001 1 $ sanlock direct dump /dev/mapper/raw 2017-04-21 20:02:54+0800 39406 [24937]: s2:r3 resource libvirt:test1:/dev/mapper/raw:1048576 for 2,10,65662 2017-04-21 20:02:54+0800 39406 [24937]: r3 paxos_acquire begin 2 0 0 2017-04-21 20:02:54+0800 39406 [24937]: r3 paxos_acquire leader 1 owner 1 1 40075 max mbal[0] 1 our_dblock 0 0 0 0 0 0 2017-04-21 20:02:54+0800 39406 [24937]: r3 paxos_acquire owner 1 1 40075 host_status 1 1 40139 wait_start 39396 2017-04-21 20:02:54+0800 39406 [24937]: r3 paxos_acquire owner 1 delta 1 1 40159 alive 2017-04-21 20:02:54+0800 39406 [24937]: r3 acquire_disk rv -243 lver 1 at 40075 2017-04-21 20:02:54+0800 39406 [24937]: r3 acquire_token held error -243 2017-04-21 20:02:54+0800 39406 [24937]: r3 release_token r_flags 0 lver 0 2017-04-21 20:02:54+0800 39406 [24937]: r3 release_token done r_flags 0 2017-04-21 20:02:54+0800 39406 [24937]: r3 cmd_acquire 2,10,65662 acquire_token -243 lease owned by other host 2017-04-21 20:02:54+0800 39406 [24937]: cmd_acquire 2,10,65662 result -243 pid_dead 0 2017-04-21 20:02:54+0800 39406 [24933]: client_pid_dead 2,10,65662 cmd_active 0 suspend 0 2017-04-21 20:05:43+0800 39573 [24933]: cmd_register ci 2 fd 10 pid 65914 2017-04-21 20:05:43+0800 39573 [24933]: cmd_restrict ci 2 fd 10 pid 65914 flags 1 2017-04-21 20:05:43+0800 39574 [24938]: cmd_inquire 2,10,65914 ci_in 3 fd 15 2017-04-21 20:05:43+0800 39574 [24938]: cmd_inquire 2,10,65914 result 0 pid_dead 0 res_count 0 cat_count 0 strlen 0 2017-04-21 20:05:43+0800 39574 [24937]: cmd_acquire 2,10,65914 ci_in 4 fd 16 count 1 flags 0 启动失败，无法获取test1的所有者。
$ killall -9 qemu-kvm $ virsh list --all Id 名称 状态 ---------------------------------------------------- - test1_sanlock 关闭 - test2_sanlock 关闭 - test3_sanlock 关闭 - test4_sanlock 关闭 - test_sanlock 关闭 $ sanlock direct dump /dev/mapper/raw offset lockspace resource timestamp own gen lver 00000000 libvirt 581e732d-e4b1-4216-8b2f-1a63f08bb28d.Test1 0000040262 0001 0001 00000512 libvirt b888aabb-0f5f-45ce-a310-ff8021f514fd.Test2 0000039498 0002 0001 01048576 libvirt test1 0000000000 0001 0001 1 关闭虚拟机后，资源test1的时间戳变为0。
$ virsh start test4_sanlock 域 test4_sanlock 已开始 $ virsh list --all Id 名称 状态 ---------------------------------------------------- 2 test4_sanlock running - test1_sanlock 关闭 - test2_sanlock 关闭 - test3_sanlock 关闭 - test_sanlock 关闭 $ sanlock direct dump /dev/mapper/raw offset lockspace resource timestamp own gen lver 00000000 libvirt 581e732d-e4b1-4216-8b2f-1a63f08bb28d.Test1 0000040344 0001 0001 00000512 libvirt b888aabb-0f5f-45ce-a310-ff8021f514fd.Test2 0000039580 0002 0001 01048576 libvirt test1 0000039574 0002 0001 2 启动成功，资源test1的所有者变为Host ID 2，即Test2节点。
本文发表于2017年09月20日 08:37
(c)注：本文转载自https://my.oschina.net/LastRitter/blog/1540124，转载目的在于传递更多信息，并不代表本网赞同其观点和对其真实性负责。如有侵权行为，请联系我们，我们会及时删除.
阅读 2262 讨论 0 喜欢 0
避坑！MotionGo就是一款诈骗软件！千万不要用ChatPPT，浪费时间！
宝塔面板使用WWW用户执行计划任务命令 解决laravel日志权限问题 宝塔设置计划任务执行用户
手机微信一键制作透明底文字表情 教你如何让微信表情包背景为透明 自制微信表情包动图 文字表情在线制作
ssh目录权限配置指南 .ssh文件夹及rsa_id.pub等文件正确权限规则
Mac连接亚马逊AWS EC2 远程连接登录不上去 有pem私钥文件依然要输密码 默认密码 教程
PHP工程师必知必会 - Linux系统常用命令 - Linux中的网络管理命令（下）
| 抢先体验 |
|---|
扫码体验 |
| 闪念胶囊 |
|---|
|
你要过得好哇，这样我才能恨你啊，你要是过得不好，我都不知道该恨你还是拥抱你啊。 17:21 2021年04月19日 查看详情 |
|
直抵黄龙府，与诸君痛饮尔。 18:17 2021年03月28日 查看详情 |
|
那时陪伴我的人啊，你们如今在何方。 16:28 2021年03月19日 查看详情 |
|
不出意外的话，我们再也不会见了，祝你前程似锦。 18:05 2021年03月17日 查看详情 |
|
这世界真好，吃野东西也要留出这条命来看看 21:21 2021年03月14日 查看详情 |
| Contact |
|---|
Y2lvbkBjaGluYWNpb24uY24= |