The server reads 16K bytes from /dev/urandom and encodes them in base64, generating a unique random string for each request. The essence of the work is to calculate the MD5 hash of the received random string for a specified period of time (in milliseconds), simulating work that requires a lot of CPU resources. The server accepts CPU time, synchronous wait parameters in the request URL. If parameters are not specified, default values are used.
go mod tidy
go mod vendor
go build idler.govariants
./idler -maxprocs 4 -port 8078 # only payload, health and hello handlers
./idler -maxprocs 4 -port 8078 -config config.json -init_redis_keys -init_redis -init_postgres -init_postgres_keys # run with redis and postgres handlers
./idler -init_postgres -clear_postgres #clean dataset in pg and stop application-
maxprocs- default: 4 -
port- default: 8078 -
configsample file
{
"redis": {
"addr": "localhost:6379", // default: localhost:6379
"password": "", // default: empty
"db": 0, // default: 0
"ttl": 30, // default: 30 (seconds)
"count": 1000 // default: 1000 (test data pool)
},
"postgres": {
"dns": "postgres://postgres:password@localhost:5432/dbname",
"count": 1000, // default: 1000 (test data pool)
"table_name": "key_value", // default: key_value
"min_conns": 1, // default: 2
"max_conns": 10, // default: 20
"life_time": 60, // default: 60*60 (seconds)
"health_check": 60 // default: 60 (seconds)
}
}init_redis- activate redis handler
/redis - get random keys
/redis?id=10 - get current keys
init_postgres- activate postgres handler
/postgres - get random keys
/postgres?id=10 - get current keys
init_redis_keysandinit_postgres_keys- load keys and values to storage, range [1 - ]
curl -X GET "http://localhost:8078/health"
curl -X GET "http://localhost:8078/payload?cpu_ms=100&io_ms=500"
curl -X GET "http://localhost:8078/health" # return OK
curl -X GET "http://localhost:8078/hello" # return Hello, world!cpu_ms - CPU time that the service spends on calculating hash sums
io_ms - Waiting after execution
for use on mac os need change line 26 to 25, current version is prepared for linux. syscall.RUSAGE_THREAD to syscall.RUSAGE_SELF