155 lines
3.3 KiB
Go
155 lines
3.3 KiB
Go
package server
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
"path/filepath"
|
|
"runtime"
|
|
"strings"
|
|
|
|
"github.com/kubernetes-incubator/ocid/utils"
|
|
"github.com/opencontainers/ocitools/generate"
|
|
)
|
|
|
|
func getGPRCVersion() (string, error) {
|
|
_, file, _, ok := runtime.Caller(0)
|
|
if !ok {
|
|
return "", errors.New("failed to recover the caller information.")
|
|
}
|
|
|
|
ocidRoot := filepath.Dir(filepath.Dir(file))
|
|
p := filepath.Join(ocidRoot, "Godeps/Godeps.json")
|
|
|
|
grepCmd := fmt.Sprintf(`grep -r "\"google.golang.org/grpc\"" %s -A 1 | grep "\"Rev\"" | cut -d: -f2 | tr -d ' "\n'`, p)
|
|
|
|
out, err := utils.ExecCmd("bash", "-c", grepCmd)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
return out, nil
|
|
}
|
|
|
|
func copyFile(src, dest string) error {
|
|
in, err := os.Open(src)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer in.Close()
|
|
|
|
out, err := os.Create(dest)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer out.Close()
|
|
|
|
if _, err := io.Copy(out, in); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func removeFile(path string) error {
|
|
if _, err := os.Stat(path); err == nil {
|
|
if err := os.Remove(path); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func parseDNSOptions(servers, searches []string, path string) error {
|
|
nServers := len(servers)
|
|
nSearches := len(searches)
|
|
if nServers == 0 && nSearches == 0 {
|
|
return copyFile("/etc/resolv.conf", path)
|
|
}
|
|
|
|
if nSearches > maxDNSSearches {
|
|
return fmt.Errorf("DNSOption.Searches has more than 6 domains")
|
|
}
|
|
|
|
f, err := os.Create(path)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer f.Close()
|
|
|
|
if nSearches > 0 {
|
|
data := fmt.Sprintf("search %s\n", strings.Join(searches, " "))
|
|
_, err = f.Write([]byte(data))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
if nServers > 0 {
|
|
data := fmt.Sprintf("nameserver %s\n", strings.Join(servers, "\nnameserver "))
|
|
_, err = f.Write([]byte(data))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// kubernetes compute resources - CPU: http://kubernetes.io/docs/user-guide/compute-resources/#meaning-of-cpu
|
|
func setResourcesCPU(limits, requests, defaultCores float64, g generate.Generator) error {
|
|
if requests > limits {
|
|
return fmt.Errorf("CPU.Requests should not be greater than CPU.Limits")
|
|
}
|
|
|
|
cores := defaultCores
|
|
if limits != 0 || requests != 0 {
|
|
if limits > requests {
|
|
cores = limits
|
|
} else {
|
|
cores = requests
|
|
}
|
|
}
|
|
|
|
period := uint64(defaultCPUCFSPeriod)
|
|
quota := uint64(float64(period) * cores)
|
|
|
|
if quota < minCPUCFSQuota {
|
|
quota = minCPUCFSQuota
|
|
}
|
|
|
|
// adjust quota and period for the case where multiple CPUs are requested
|
|
// so that cpu.cfs_quota_us <= maxCPUCFSQuota.
|
|
for quota > maxCPUCFSQuota {
|
|
quota /= 10
|
|
period /= 10
|
|
}
|
|
|
|
g.SetLinuxResourcesCPUPeriod(period)
|
|
g.SetLinuxResourcesCPUQuota(quota)
|
|
return nil
|
|
}
|
|
|
|
// kubernetes compute resources - Memory: http://kubernetes.io/docs/user-guide/compute-resources/#meaning-of-memory
|
|
func setResourcesMemory(limits, requests, defaultMem float64, g generate.Generator) error {
|
|
if requests > limits {
|
|
return fmt.Errorf("Memory.Requests should not be greater than Memory.Limits")
|
|
}
|
|
|
|
if limits != 0 {
|
|
if requests == 0 {
|
|
requests = limits
|
|
}
|
|
} else {
|
|
if requests == 0 {
|
|
// set the default values of limits and requests
|
|
requests = defaultMem
|
|
limits = defaultMem
|
|
} else {
|
|
limits = requests
|
|
}
|
|
}
|
|
|
|
g.SetLinuxResourcesMemoryLimit(uint64(limits))
|
|
g.SetLinuxResourcesMemoryReservation(uint64(requests))
|
|
return nil
|
|
}
|