MongoDB 7.02 启动时没有副本集，而 Openshift 3.11 中具有 Readiness Probe

Question

我正在尝试将 Liveness 和 Readiness Probe 添加到 Openshift 中的 MongoDB 中。没有这些参数，Mongo 每次都可以完美部署。我必须创建单节点副本集，因为我的备份方法需要它，所以我需要使用副本集运行 Mongo。我不知道这是否重要，但我在 Dockerfile 中使用entrypoint.sh 而不是 CMD

我正在像这样创建我的副本集

"rs.initiate(
 {
 _id: 'rs0',
 members: [
 { _id: 0, host: '(openshift-service-name):27017'},
 ]
 });"

然后我要在 helm 图表中添加 Liveness 和 Readiness Probe

           livenessProbe:
             exec:
               command: [ "mongosh", "--host",  "localhost", "--port", "27017", "-u", "admin", "-p", "'admin'", "--authenticationDatabase", "'admin'", "--eval", "'db.getSiblingDB(\"admin\").runCommand({ replSetGetStatus: 1 }).ok ? 0 : 2'" ]
             initialDelaySeconds: 70         
             periodSeconds: 60
             failureThreshold: 3
             timeoutSeconds: 20 
          readinessProbe:
            exec:
              command: [ "mongosh", "--host",  "localhost", "--port", "27017", "-u", "admin", "-p", "'admin'", "--authenticationDatabase", "'admin'", "--eval", "'db.runCommand({ ping: 1 }).ok ? 0 : 2'" ]
            initialDelaySeconds: 70
            periodSeconds: 60
            failureThreshold: 3
            timeoutSeconds: 20

有趣的是，使用上面给出的配置进行的活性检查也会“损坏”数据库，但在第一次运行时它总是正常运行。但是，如果我杀死了 pod，它就会消失。

另一方面，由于容器永久处于未就绪状态，因此不可能运行 Readiness Probe，无论我在这里提供什么命令。例如回声也是不可能的。我尝试删除初始延迟，设置为 10 秒，具有更宽的超时框架等。

我相信有最重要的日志：

{"t":{"$date":"2024-01-18T06:15:34.306+00:00"},"s":"I",  "c":"CONTROL",  "id":20711,   "ctx":"LogicalSessionCacheReap","msg":"Failed to reap transaction table","attr":{"error":"NotYetInitialized: Replication has not yet been configured"}}
{"t":{"$date":"2024-01-18T06:15:34.306+00:00"},"s":"I",  "c":"SHARDING", "id":7012500, "ctx":"QueryAnalysisConfigurationsRefresher","msg":"Failed to refresh query analysis configurations, will try again at the next interval","attr":{"error":"PrimarySteppedDown: No primary exists currently"}}
{"t":{"$date":"2024-01-18T06:15:34.307+00:00"},"s":"I",  "c":"NETWORK",  "id":5693100, "ctx":"ReplCoord-0","msg":"Asio socket.set_option failed with std::system_error","attr":{"note":"connect (sync) TCP fast open","option":{"level":6,"name":30,"data":"01 00 00 00"},"error":{"what":"set_option: Protocol not available","message":"Protocol not available","category":"asio.system","value":92}}}
{"t":{"$date":"2024-01-18T06:15:34.466+00:00"},"s":"I",  "c":"-",        "id":4939300, "ctx":"monitoring-keys-for-HMAC","msg":"Failed to refresh key cache","attr":{"error":"ReadConcernMajorityNotAvailableYet: Read concern majority reads are currently not possible.","nextWakeupMillis":400}}
{"t":{"$date":"2024-01-18T06:15:36.800+00:00"},"s":"I",  "c":"REPL",     "id":21394,   "ctx":"ReplCoord-0","msg":"This node is not a member of the config"}
{"t":{"$date":"2024-01-18T06:15:36.800+00:00"},"s":"I",  "c":"REPL",     "id":21358,   "ctx":"ReplCoord-0","msg":"Replica set state transition","attr":{"newState":"REMOVED","oldState":"STARTUP"}}
{"t":{"$date":"2024-01-18T06:16:14.306+00:00"},"s":"I",  "c":"SHARDING", "id":7012500, "ctx":"QueryAnalysisConfigurationsRefresher","msg":"Failed to refresh query analysis configurations, will try again at the next interval","attr":{"error":"PrimarySteppedDown: No primary exists currently"}}

Answer 1

您需要稍等一下，直到副本集启动。使用这样的脚本：

rs.initiate(
   {
      _id: 'rs0',
      members: [
         { _id: 0, host: '(openshift-service-name):27017' },
      ]
   }
);
while (! db.hello().isWritablePrimary ) sleep(1000);