I want to use executable file within AWS lambda handler function. Here is my handler function where I want to use executable
func handler(){
cmd := exec.Command("./balance", "GetBalance", id)
cmd.Dir = "/Users/xxxx/go/src/getBalance"
output, err := cmd.Output()
}
I want to use the output of the above command in this handler. Is it possible to use? If possible, do I need to zip both executables? Or is there any other way where I can use executable within the handler?
Sadly, you will not be able to write to /Users/xxxx/go/src/getBalance. In lambda, you have access only to /tmp.
Also, if you bundle the balance file with your deployment package it will be stored in /var/task alongside your function code.
EDIT:
Based on the new comments, to complete solution also required removal of cmd.Dir and recompilation of balance for linux.
balance with my deployment package, it will be stored in /var/task? So do i need to use /var/task instead of /Users/xxxx/go/src/getBalance or do i need to do any modification to my exec.Command?
/var/task/. I don't know if your current command is correct or not. I don't know what is ./balance. It may require some dependencies to run not available in lambda. You have to just try and see how it goes. Only you know what ./balance is, whether it requires any arguments, external libraries, files../balance requires two arguments. It will be like ./balance GetBalance 12345 where 12345 is id which is variable. It will give balance of id. It doesn't require any dependencies. I compiled it into linux environment. it is working fine with my other binary. But I don't know how to do with lambda. I will try using /var/task.exec.Command without cmd.Dir. One more thing I was doing wrong before is that I didn't compile balance to linux environment. Now I compiled into linux and not using cmd.Dir. Now it is working.