PCSD 簡單主/從不會故障主切換

我正在嘗試編寫一個簡單的起搏器主/從系統。我創建了一個代理，它的元數據如下：

elm_meta_data() {
 cat <<EOF
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="elm-agent">
 <version>0.1</version>
 <longdesc lang="en">
   Resource agent for ELM high availability clusters.
 </longdesc>
 <shortdesc>
   Resource agent for ELM
 </shortdesc>
 <parameters>
   <parameter name="datadir" unique="0" required="1">
     <longdesc lang="en">
     Data directory
     </longdesc>
     <shortdesc lang="en">Data directory</shortdesc>
     <content type="string"/>
   </parameter>
 </parameters>
 <actions>
   <action name="start"        timeout="35" />
   <action name="stop"         timeout="35" />
   <action name="monitor"      timeout="35"
                               interval="10" depth="0" />
   <action name="monitor"      timeout="35"
                               interval="10" depth="0" role="Master" />
   <action name="monitor"      timeout="35"
                               interval="11" depth="0" role="Slave" />
   <action name="reload"       timeout="70" />
   <action name="meta-data"    timeout="5" />
   <action name="promote"      timeout="20" />
   <action name="demote"       timeout="20" />
   <action name="validate-all" timeout="20" />
   <action name="notify"       timeout="20" />
 </actions>
</resource-agent>
EOF
}

我的監控，提升，降級是：

elm_monitor() {
 local elm_running
 local worker_running
 local is_master

 elm_running=0
 worker_running=0
 is_master=0

 if [ -e "${OCF_RESKEY_datadir}/master.conf" ]; then
   is_master=1
 fi

 if [ "$(docker ps -q -f name=elm_web)" ]; then
   elm_running=1
 fi
 if [ "$(docker ps -q -f name=elm_worker)" ]; then
   worker_running=1
 fi
 if [ $elm_running -ne $worker_running ]; then
   if [ $is_master -eq 1 ]; then
     exit $OCF_FAILED_MASTER
   fi
   exit $OCF_ERR_GENERIC
 fi
 if [ $elm_running -eq 0 ]; then
   return $OCF_NOT_RUNNING
 fi
 ...
 if [ $is_master -eq 1 ]; then
   exit $OCF_FAILED_MASTER
 fi
 exit $OCF_ERR_GENERIC
}
elm_promote() {
 touch ${OCF_RESKEY_datadir}/master.conf
 return $OCF_SUCCESS
}

elm_demote() {
 rm ${OCF_RESKEY_datadir}/master.conf
 return $OCF_SUCCESS
}

如果我使用以下 cib 命令配置集群，它會得到三個從屬伺服器並且沒有主伺服器：

sudo pcs cluster cib cluster1.xml

sudo pcs -f cluster1.xml resource create elmd ocf:a10:elm    \
   datadir="/etc/a10/elm"                                  \
   op start timeout=90s                                     \
   op stop timeout=90s                                      \
   op promote timeout=60s                                   \
   op demote timeout=60s                                    \
   op monitor interval=15s timeout=35s role="Master"        \
   op monitor interval=16s timeout=35s role="Slave"         \
   op notify timeout=60s

sudo pcs -f cluster1.xml resource master elm-ha elmd notify=true
sudo pcs -f cluster1.xml resource create ClusterIP ocf:heartbeat:IPaddr2 ip=$vip cidr_netmask=$net_mask op monitor interval=10s

sudo pcs -f cluster1.xml constraint colocation add ClusterIP with master elm-ha INFINITY
sudo pcs -f cluster1.xml constraint order promote elm-ha then start ClusterIP symmetrical=false kind=Mandatory
sudo pcs -f cluster1.xml constraint order demote elm-ha then stop ClusterIP symmetrical=false kind=Mandatory
sudo pcs cluster cib-push cluster1.xml

ubuntu@elm1:~$ sudo pcs status
...
elm_proxmox_fence100   (stonith:fence_pve):    Started elm1
elm_proxmox_fence101   (stonith:fence_pve):    Started elm2
elm_proxmox_fence103   (stonith:fence_pve):    Started elm3
Master/Slave Set: elm-ha [elmd]
    Slaves: [ elm1 elm2 elm3 ]
ClusterIP  (ocf::heartbeat:IPaddr2):   Stopped

而如果我將以下命令添加到 cib，我會得到一個主/從設置：

sudo pcs -f cluster1.xml constraint location elm-ha rule role=master \#uname eq $(hostname)

  Master/Slave Set: elm-ha [elmd]
      Masters: [ elm1 ]
      Slaves: [ elm2 elm3 ]
  ClusterIP    (ocf::heartbeat:IPaddr2):   Started elm1

但是在最後一個版本上，大師似乎堅持使用 elm1。當我測試失敗時，通過停止主伺服器上的 corosync 服務，我最終得到了 2 個從伺服器，主伺服器處於停止狀態。我猜測設置規則是強制起搏器將主控保持在 elm1 上。

    Master/Slave Set: elm-ha [elmd]
        Slaves: [ elm2 elm3 ]
        Stopped: [ elm1 ]
    ClusterIP  (ocf::heartbeat:IPaddr2):   Stopped

如何配置它，以便當我發送我的 cib 命令時，它會選擇一個主伺服器並在主伺服器出現故障時進行故障轉移？我的代理需要一些不同的東西嗎？

我終於在文件中找到了答案。我未能在 monitor() 中設置主首選項屬性

crm_master -l reboot -v 100

引用自：https://serverfault.com/questions/1021567