当我尝试使用 --eval 执行 JavaScript 代码时，mongo shell 会生成额外的输出，--quiet 选项似乎不起作用
check_mongodb_availability() {
local hostname=$1
local database=$2
local js=" var found = 0;
var dbs = db.getMongo().getDBNames();
for(var i in dbs) {
if (dbs[i].toString() == '"${database}"') found = 1;
}
if (found === 1) print(true); else print(false);
"
if [ $(mongo --host $hostname --eval "$js" --quiet) == "true" ]; then
return 1
else
return 0
fi
}
上述函数失败，提示“参数太多”
它的输出如下
2019-10-10T10:37:57.262+0000 I NETWORK [js] Starting new replica set monitor for replicaSet/172.31.79.62:27017,172.31.69.171:27017,172.31.73.190:27017 2019-10-10T10:37:57.263+0000 I NETWORK [js] Successfully connected to 172.31.69.171:27017 (1 connections now open to 172.31.69.171:27017 with a 5 second timeout) 2019-10-10T10:37:57.263+0000 I NETWORK [ReplicaSetMonitor-TaskExecutor] Successfully connected to 172.31.79.62:27017 (1 connections now open to 172.31.79.62:27017 with a 5 second timeout) 2019-10-10T10:37:57.264+0000 I NETWORK [js] changing hosts to replicaSet/172.31.79.62:27017,mongodb-replica-2:27017,mongodb-replica-3:27017 from replicaSet/172.31.69.171:27017,172.31.73.190:27017,172.31.79.62:27017 2019-10-10T10:37:57.265+0000 I NETWORK [ReplicaSetMonitor-TaskExecutor] Successfully connected to mongodb-replica-2:27017 (1 connections now open to mongodb-replica-2:27017 with a 5 second timeout) 2019-10-10T10:37:57.265+0000 I NETWORK [js] Successfully connected to mongodb-replica-3:27017 (1 connections now open to mongodb-replica-3:27017 with a 5 second timeout) true
我需要通过避免所有额外的噪音来打印“true”或“false”
最佳答案
不幸的是，这是一个在 2016 年首次出现的活跃 bug...
https://jira.mongodb.org/browse/SERVER-27159
两种可能的解决方法:
- 从主机列表中删除副本集名称。例如:
host-1:27017,host-2:27017,host-3:27017而不是my-replica-set:host-1:27017,host-2:27017,host -3:27017 - 通过 tail 管道输出
关于mongodb - 如何使用副本集以安静模式进行 mongo shell，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/58321682/