running golang using gin framework in AWS Lambda & API Gateway
see the main.go in master branch.
package main
import (
"log"
"net/http"
"os"
"github.com/apex/gateway"
"github.com/gin-gonic/gin"
)
func helloHandler(c *gin.Context) {
name := c.Param("name")
c.String(http.StatusOK, "Hello %s", name)
}
func welcomeHandler(c *gin.Context) {
c.String(http.StatusOK, "Hello World from Go")
}
func rootHandler(c *gin.Context) {
c.JSON(http.StatusOK, gin.H{
"text": "Welcome to gin lambda server.",
})
}
func routerEngine() *gin.Engine {
// set server mode
gin.SetMode(gin.DebugMode)
r := gin.New()
// Global middleware
r.Use(gin.Logger())
r.Use(gin.Recovery())
r.GET("/welcome", welcomeHandler)
r.GET("/user/:name", helloHandler)
r.GET("/", rootHandler)
return r
}
func main() {
addr := ":" + os.Getenv("PORT")
log.Fatal(gateway.ListenAndServe(addr, routerEngine()))
}Build binary
$ GOOS=linux go build -o main .
$ zip deployment.zip mainUpload the deployment.zip to AWS Lambda using drone-lambda command.
$ AWS_ACCESS_KEY_ID=xxxx \
AWS_SECRET_ACCESS_KEY=xxx \
drone-lambda --region ap-southeast-1 \
--function-name function_name \
--zip-file deployment.zip
Output log:
{
CodeSha256: "r/I7yg9tX9MWPsPH337Xk5MIF1dVgkDCFhOrmAYe7hc=",
CodeSize: 4334079,
Description: "",
Environment: {
Variables: {
PORT: "8080"
}
},
FunctionArn: "arn:aws:lambda:ap-southeast-1:xxxxxxx:function:gin:7",
FunctionName: "gin",
Handler: "main",
LastModified: "2018-01-21T06:21:28.395+0000",
MemorySize: 128,
Role: "arn:aws:iam::xxxxxxx:role/service-role/test",
Runtime: "go1.x",
Timeout: 3,
TracingConfig: {
Mode: "PassThrough"
},
Version: "7",
VpcConfig: {
SecurityGroupIds: [],
SubnetIds: []
}
}Add the following AWS policy if you want to integrate with CI/CD tools like Jenkins, GitLab Ci or Drone.
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": [
"s3:PutObject",
"iam:ListRoles",
"lambda:UpdateFunctionCode",
"lambda:CreateFunction"
],
"Resource": "arn:aws:logs:*:*:*"
}
]
}Memory: 128 MB, Latencies: 6.091282008s
$ vegeta attack -rate=1024 -duration=10s -targets=target2.txt | tee results.bin | vegeta report
Requests [total, rate] 10240, 1024.10
Duration [total, attack, wait] 20.335101947s, 9.999018014s, 10.336083933s
Latencies [mean, 50, 95, 99, max] 6.091282008s, 4.893951645s, 14.508009942s, 17.11847442s, 20.128384389s
Bytes In [total, mean] 143360, 14.00
Bytes Out [total, mean] 0, 0.00
Success [ratio] 100.00%
Status Codes [code:count] 200:10240
Memory: 512 MB, Latencies: 1.491340336s
$ vegeta attack -rate=1024 -duration=10s -targets=target2.txt | tee results.bin | vegeta report
Requests [total, rate] 10240, 1024.10
Duration [total, attack, wait] 11.989730554s, 9.999012371s, 1.990718183s
Latencies [mean, 50, 95, 99, max] 1.491340336s, 1.114643849s, 4.112241113s, 6.087949237s, 10.107294516s
Bytes In [total, mean] 143360, 14.00
Bytes Out [total, mean] 0, 0.00
Success [ratio] 100.00%
Status Codes [code:count] 200:10240
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