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-rw-r--r--pkg/spec/spec.go20
-rw-r--r--pkg/spec/spec_linux.go42
-rw-r--r--pkg/spec/spec_unsupported.go7
3 files changed, 69 insertions, 0 deletions
diff --git a/pkg/spec/spec.go b/pkg/spec/spec.go
index 5cc021bf5..d44beb3e4 100644
--- a/pkg/spec/spec.go
+++ b/pkg/spec/spec.go
@@ -20,6 +20,12 @@ import (
const cpuPeriod = 100000
+type systemUlimit struct {
+ name string
+ max uint64
+ cur uint64
+}
+
func getAvailableGids() (int64, error) {
idMap, err := user.ParseIDMapFile("/proc/self/gid_map")
if err != nil {
@@ -557,6 +563,20 @@ func addRlimits(config *CreateConfig, g *generate.Generator) error {
)
for _, u := range config.Resources.Ulimit {
+ if u == "host" {
+ if len(config.Resources.Ulimit) != 1 {
+ return errors.New("ulimit can use host only once")
+ }
+ hostLimits, err := getHostRlimits()
+ if err != nil {
+ return err
+ }
+ for _, i := range hostLimits {
+ g.AddProcessRlimits(i.name, i.max, i.cur)
+ }
+ break
+ }
+
ul, err := units.ParseUlimit(u)
if err != nil {
return errors.Wrapf(err, "ulimit option %q requires name=SOFT:HARD, failed to be parsed", u)
diff --git a/pkg/spec/spec_linux.go b/pkg/spec/spec_linux.go
new file mode 100644
index 000000000..fcdfc5c4e
--- /dev/null
+++ b/pkg/spec/spec_linux.go
@@ -0,0 +1,42 @@
+//+build linux
+
+package createconfig
+
+import (
+ "syscall"
+
+ "github.com/pkg/errors"
+)
+
+type systemRlimit struct {
+ name string
+ value int
+}
+
+var systemLimits = []systemRlimit{
+ {"RLIMIT_AS", syscall.RLIMIT_AS},
+ {"RLIMIT_CORE", syscall.RLIMIT_CORE},
+ {"RLIMIT_CPU", syscall.RLIMIT_CPU},
+ {"RLIMIT_DATA", syscall.RLIMIT_DATA},
+ {"RLIMIT_FSIZE", syscall.RLIMIT_FSIZE},
+ {"RLIMIT_NOFILE", syscall.RLIMIT_NOFILE},
+ {"RLIMIT_STACK", syscall.RLIMIT_STACK},
+}
+
+func getHostRlimits() ([]systemUlimit, error) {
+ ret := []systemUlimit{}
+ for _, i := range systemLimits {
+ var l syscall.Rlimit
+ if err := syscall.Getrlimit(i.value, &l); err != nil {
+ return nil, errors.Wrapf(err, "cannot read limits for %s", i.name)
+ }
+ s := systemUlimit{
+ name: i.name,
+ max: l.Max,
+ cur: l.Cur,
+ }
+ ret = append(ret, s)
+ }
+ return ret, nil
+
+}
diff --git a/pkg/spec/spec_unsupported.go b/pkg/spec/spec_unsupported.go
new file mode 100644
index 000000000..0f6a9acdc
--- /dev/null
+++ b/pkg/spec/spec_unsupported.go
@@ -0,0 +1,7 @@
+//+build !linux
+
+package createconfig
+
+func getHostRlimits() ([]systemUlimit, error) {
+ return nil, nil
+}