我正试图编写一个使用Amazon ElasticCache上的Redis的AWS Lambda函数。问题是,我无法连接到Redis。我使用类似于以下代码的代码:
'use strict'
function handler (data, context, cb) {
const redis = require("redis")
console.log('before client initialization')
const client = redis.createClient({
url: 'redis://propper-url-cache.some.0001.euw1.cache.amazonaws.com:6379',
retry_strategy: function(options) {
console.log(options)
if (options.total_retry_time > 1000) {
throw new Error('can`t connect to redis')
}
}
})
console.log('after client initialization')
client.on("error", function (err) {
console.log('in error')
cb({error: err})
});
client.get("counter", function (err, counter) {
console.log('counter', counter)
if(_.isNull(counter)) {
counter = 0
}
client.set('counter', counter + 1, function(err) {
console.log(err)
cb(null, {counter: counter})
})
});
}
exports.handler = handler
作为结果,我在日志中看到类似以下的内容:
15:33:41
START RequestId: d8024ec2-7f36-11e6-996c-1bfcb60572c6 Version: $LATEST
15:33:42
2016-09-20T13:33:42.632Z d8024ec2-7f36-11e6-996c-1bfcb60572c6 before client initialization
15:33:42
2016-09-20T13:33:42.813Z d8024ec2-7f36-11e6-996c-1bfcb60572c6 after client initialization
15:33:44
END RequestId: d8024ec2-7f36-11e6-996c-1bfcb60572c6
15:33:44
REPORT RequestId: d8024ec2-7f36-11e6-996c-1bfcb60572c6 Duration: 3002.67 ms Billed Duration: 3000 ms Memory Size: 128 MB Max Memory Used: 19 MB
15:33:44
2016-09-20T13:33:44.620Z d8024ec2-7f36-11e6-996c-1bfcb60572c6 Task timed out after 3.00 seconds
当我更改redis的URL为明显无意义的内容时,会出现额外的一行:
2016-09-20T13:29:42.953Z 48fcb071-7f36-11e6-bc52-c5ac58c12843 { attempt: 1, error: { [Error: Redis connection to some-url.euw1.cache.amazonaws.com:6379 failed - getaddrinfo ENOTFOUND some-url.euw1.cache.amazonaws.com some-url.euw1.cache.amazonaws.com:6379] code: 'ENOTFOUND', errno: 'ENOTFOUND', syscall: 'getaddrinfo', hostna
有什么想法吗?