cri-o/server/utils.go
Mrunal Patel bbe5325afc Fix the build to account for the change in repository
Signed-off-by: Mrunal Patel <mrunalp@gmail.com>
2016-09-09 14:48:39 -07:00

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
}