AWS Lambda aws.ec2()不返回值(NodeJS) [英] AWS Lambda aws.ec2() doesn't return values (NodeJS)
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问题描述
我有一个Lambda函数,可以在EC2中创建快照.该函数有效,但是没有返回值(即,我想获取该值data.SnapshotId
).
I have a Lambda function to create snapshots in EC2. The function works but there is no return value (ie, I want to get this value data.SnapshotId
).
用于创建快照的EC2调用嵌套在对s3.getObject的调用内,而在对s3.putObject的调用前.
The EC2 call to create snapshot is nested inside a call to s3.getObject and before a call to s3.putObject.
s3.getObject(params, function(err, data) {
if (err) {
console.log(err);
console.log(message);
context.fail(message);
} else {
new aws.EC2().createSnapshot(params_snapshot, function(err, data) {
if (err) console.log(err, err.stack); // an error occurred
else {
console.log(data.SnapshotId); // this is my concern
}
});
var params_new = {
Bucket: bucket,
Key: key,
Body: body
};
s3.putObject(params_new, function(err, data) {
if (err) {
console.log(err);
console.log(message);
context.fail(message);
} else {
console.log('CONTENT TYPE putObject:', data.ContentType);
context.succeed(data.ContentType);
}
});
}
});
我最关心的是这里
new aws.EC2().createSnapshot(params_snapshot, function(err, data) {
if (err) console.log(err, err.stack); // an error occurred
else {
console.log(data.SnapshotId); // this is my concern
}
});
推荐答案
解决方案是我需要将s3.putObject()嵌套在EC2()请求中,因为它们同时发生.
The solution is I need to nest the s3.putObject() inside EC2() request because they happen concurrently.
s3.getObject(params, function(err, data) {
if (err) {
console.log(err);
console.log(message);
context.fail(message);
} else {
new aws.EC2().createSnapshot(params_snapshot, function(err, data) {
if (err) console.log(err, err.stack);
else {
console.log(data.SnapshotId);
var params_new = {
Bucket: bucket,
Key: key,
Body: body
};
s3.putObject(params_new, function(err, data) {
if (err) {
console.log(err);
console.log(message);
context.fail(message);
} else {
console.log('CONTENT TYPE putObject:', data.ContentType);
context.succeed(data.ContentType);
}
});
}
});
}
});
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