VOL-381 add unum container to support ONOS cluster formation under swarm
Change-Id: Ic260edda19bb199ed040f05164ab605f28c919d0
diff --git a/unum/vendor/github.com/docker/go-units/ulimit.go b/unum/vendor/github.com/docker/go-units/ulimit.go
new file mode 100644
index 0000000..5ac7fd8
--- /dev/null
+++ b/unum/vendor/github.com/docker/go-units/ulimit.go
@@ -0,0 +1,118 @@
+package units
+
+import (
+ "fmt"
+ "strconv"
+ "strings"
+)
+
+// Ulimit is a human friendly version of Rlimit.
+type Ulimit struct {
+ Name string
+ Hard int64
+ Soft int64
+}
+
+// Rlimit specifies the resource limits, such as max open files.
+type Rlimit struct {
+ Type int `json:"type,omitempty"`
+ Hard uint64 `json:"hard,omitempty"`
+ Soft uint64 `json:"soft,omitempty"`
+}
+
+const (
+ // magic numbers for making the syscall
+ // some of these are defined in the syscall package, but not all.
+ // Also since Windows client doesn't get access to the syscall package, need to
+ // define these here
+ rlimitAs = 9
+ rlimitCore = 4
+ rlimitCPU = 0
+ rlimitData = 2
+ rlimitFsize = 1
+ rlimitLocks = 10
+ rlimitMemlock = 8
+ rlimitMsgqueue = 12
+ rlimitNice = 13
+ rlimitNofile = 7
+ rlimitNproc = 6
+ rlimitRss = 5
+ rlimitRtprio = 14
+ rlimitRttime = 15
+ rlimitSigpending = 11
+ rlimitStack = 3
+)
+
+var ulimitNameMapping = map[string]int{
+ //"as": rlimitAs, // Disabled since this doesn't seem usable with the way Docker inits a container.
+ "core": rlimitCore,
+ "cpu": rlimitCPU,
+ "data": rlimitData,
+ "fsize": rlimitFsize,
+ "locks": rlimitLocks,
+ "memlock": rlimitMemlock,
+ "msgqueue": rlimitMsgqueue,
+ "nice": rlimitNice,
+ "nofile": rlimitNofile,
+ "nproc": rlimitNproc,
+ "rss": rlimitRss,
+ "rtprio": rlimitRtprio,
+ "rttime": rlimitRttime,
+ "sigpending": rlimitSigpending,
+ "stack": rlimitStack,
+}
+
+// ParseUlimit parses and returns a Ulimit from the specified string.
+func ParseUlimit(val string) (*Ulimit, error) {
+ parts := strings.SplitN(val, "=", 2)
+ if len(parts) != 2 {
+ return nil, fmt.Errorf("invalid ulimit argument: %s", val)
+ }
+
+ if _, exists := ulimitNameMapping[parts[0]]; !exists {
+ return nil, fmt.Errorf("invalid ulimit type: %s", parts[0])
+ }
+
+ var (
+ soft int64
+ hard = &soft // default to soft in case no hard was set
+ temp int64
+ err error
+ )
+ switch limitVals := strings.Split(parts[1], ":"); len(limitVals) {
+ case 2:
+ temp, err = strconv.ParseInt(limitVals[1], 10, 64)
+ if err != nil {
+ return nil, err
+ }
+ hard = &temp
+ fallthrough
+ case 1:
+ soft, err = strconv.ParseInt(limitVals[0], 10, 64)
+ if err != nil {
+ return nil, err
+ }
+ default:
+ return nil, fmt.Errorf("too many limit value arguments - %s, can only have up to two, `soft[:hard]`", parts[1])
+ }
+
+ if soft > *hard {
+ return nil, fmt.Errorf("ulimit soft limit must be less than or equal to hard limit: %d > %d", soft, *hard)
+ }
+
+ return &Ulimit{Name: parts[0], Soft: soft, Hard: *hard}, nil
+}
+
+// GetRlimit returns the RLimit corresponding to Ulimit.
+func (u *Ulimit) GetRlimit() (*Rlimit, error) {
+ t, exists := ulimitNameMapping[u.Name]
+ if !exists {
+ return nil, fmt.Errorf("invalid ulimit name %s", u.Name)
+ }
+
+ return &Rlimit{Type: t, Soft: uint64(u.Soft), Hard: uint64(u.Hard)}, nil
+}
+
+func (u *Ulimit) String() string {
+ return fmt.Sprintf("%s=%d:%d", u.Name, u.Soft, u.Hard)
+}