我在 Scaleway 上运行了 6 个实例，在 ARM 服务器上运行了 3 个，在虚拟 Ubuntu 服务器上运行了 3 个。
mongodb1 ARM (mongodb 3.4.9)
mongodb2 ARM (mongodb 3.4.9)
mongodb3 ARM (mongodb 3.4.9)
mongodb4 VPS (mongodb 3.4.15)
mongodb5 VPS (mongodb 3.4.15)
mongodb6 VPS (mongodb 3.4.15)
这 6 个实例正在运行 mongodb 并加入副本集。
很多时候，ARM 实例会由于未知或隐含的原因而关闭或硬重启。
当我在正常运行的服务器上连接到 mongodb 时，我发现它们都是 SECONDARY，并且没有一个被选为私有。难道不应该这样才能让系统继续运行吗？
我还启动并运行了一个实例，使 6 个成员中有 4 个处于 UP 状态，仍然没有变化。
在我启动副本集的第 5 个成员后，使 6 个成员中有 5 个处于 UP 状态，最终选出一个节点作为主节点
以下是 rs.status() 的输出：
"members" : [
{
"_id" : 0,
"name" : "mongodb1:27017",
"health" : 0,
"state" : 8,
"stateStr" : "(not reachable/healthy)",
"uptime" : 0,
"optime" : {
"ts" : Timestamp(0, 0),
"t" : NumberLong(-1)
},
"optimeDurable" : {
"ts" : Timestamp(0, 0),
"t" : NumberLong(-1)
},
"optimeDate" : ISODate("1970-01-01T00:00:00Z"),
"optimeDurableDate" : ISODate("1970-01-01T00:00:00Z"),
"lastHeartbeat" : ISODate("2018-08-14T07:29:56.945Z"),
"lastHeartbeatRecv" : ISODate("2018-08-11T08:20:39.905Z"),
"pingMs" : NumberLong(0),
"lastHeartbeatMessage" : "Connection refused",
"configVersion" : -1
},
{
"_id" : 1,
"name" : "mongodb2:27017",
"health" : 0,
"state" : 8,
"stateStr" : "(not reachable/healthy)",
"uptime" : 0,
"optime" : {
"ts" : Timestamp(0, 0),
"t" : NumberLong(-1)
},
"optimeDurable" : {
"ts" : Timestamp(0, 0),
"t" : NumberLong(-1)
},
"optimeDate" : ISODate("1970-01-01T00:00:00Z"),
"optimeDurableDate" : ISODate("1970-01-01T00:00:00Z"),
"lastHeartbeat" : ISODate("2018-08-14T07:29:56.944Z"),
"lastHeartbeatRecv" : ISODate("2018-08-11T08:20:39.912Z"),
"pingMs" : NumberLong(0),
"lastHeartbeatMessage" : "Connection refused",
"configVersion" : -1
},
{
"_id" : 2,
"name" : "mongodb3:27017",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 966,
"optime" : {
"ts" : Timestamp(1533975634, 1),
"t" : NumberLong(14)
},
"optimeDurable" : {
"ts" : Timestamp(1533975634, 1),
"t" : NumberLong(14)
},
"optimeDate" : ISODate("2018-08-11T08:20:34Z"),
"optimeDurableDate" : ISODate("2018-08-11T08:20:34Z"),
"lastHeartbeat" : ISODate("2018-08-14T07:30:00.654Z"),
"lastHeartbeatRecv" : ISODate("2018-08-14T07:29:59.814Z"),
"pingMs" : NumberLong(1),
"configVersion" : 6
},
{
"_id" : 3,
"name" : "mongodb4:27017",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 1814348,
"optime" : {
"ts" : Timestamp(1533975634, 1),
"t" : NumberLong(14)
},
"optimeDurable" : {
"ts" : Timestamp(1533975634, 1),
"t" : NumberLong(14)
},
"optimeDate" : ISODate("2018-08-11T08:20:34Z"),
"optimeDurableDate" : ISODate("2018-08-11T08:20:34Z"),
"lastHeartbeat" : ISODate("2018-08-14T07:29:58.088Z"),
"lastHeartbeatRecv" : ISODate("2018-08-14T07:30:00.186Z"),
"pingMs" : NumberLong(1),
"configVersion" : 6
},
{
"_id" : 4,
"name" : "mongodb5:27017",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 4316484,
"optime" : {
"ts" : Timestamp(1533975634, 1),
"t" : NumberLong(14)
},
"optimeDate" : ISODate("2018-08-11T08:20:34Z"),
"infoMessage" : "could not find member to sync from",
"configVersion" : 6,
"self" : true
},
{
"_id" : 5,
"name" : "mongodb6:27017",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 1639135,
"optime" : {
"ts" : Timestamp(1533975634, 1),
"t" : NumberLong(14)
},
"optimeDurable" : {
"ts" : Timestamp(1533975634, 1),
"t" : NumberLong(14)
},
"optimeDate" : ISODate("2018-08-11T08:20:34Z"),
"optimeDurableDate" : ISODate("2018-08-11T08:20:34Z"),
"lastHeartbeat" : ISODate("2018-08-14T07:29:59.990Z"),
"lastHeartbeatRecv" : ISODate("2018-08-14T07:29:56.473Z"),
"pingMs" : NumberLong(1),
"configVersion" : 6
}
],
"ok" : 1