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Check if seccomp profile is set before assign; Check only once #567

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Check if seccomp profile is set before assign; Check only once #567

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58 changes: 33 additions & 25 deletions policy/secomp/lib.go
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,7 @@ package secomp

import (
"fmt"
"sync"

"kmodules.xyz/client-go/discovery"
meta_util "kmodules.xyz/client-go/meta"
Expand All @@ -28,35 +29,42 @@ import (
"k8s.io/client-go/rest"
)

var profile string
var (
profile string
seccomp *core.SeccompProfile
once sync.Once
)

func init() {
if meta_util.PossiblyInCluster() {
cfg, err := rest.InClusterConfig()
if err != nil {
panic(err)
}
kc := kubernetes.NewForConfigOrDie(cfg)
yes, err := discovery.CheckAPIVersion(kc.Discovery(), ">= 1.27")
if err != nil {
panic(err)
}
if yes {
profile = string(core.SeccompProfileTypeRuntimeDefault)
}
}
pflag.StringVar(&profile, "default-seccomp-profile-type", profile, "Default seccomp profile")
}

func DefaultSeccompProfile() *core.SeccompProfile {
if profile == "" {
return nil
} else if profile != string(core.SeccompProfileTypeUnconfined) &&
profile != string(core.SeccompProfileTypeRuntimeDefault) &&
profile != string(core.SeccompProfileTypeLocalhost) {
panic(fmt.Errorf("unknown seccomp profile type %s", profile))
}
return &core.SeccompProfile{
Type: core.SeccompProfileType(profile),
}
once.Do(func() {
if meta_util.PossiblyInCluster() {
cfg, err := rest.InClusterConfig()
if err != nil {
panic(err)
}
kc := kubernetes.NewForConfigOrDie(cfg)
yes, err := discovery.CheckAPIVersion(kc.Discovery(), ">= 1.27")
if err != nil {
panic(err)
}
if yes && profile == "" {
profile = string(core.SeccompProfileTypeRuntimeDefault)
}
}
if profile == "" {
seccomp = nil
} else if profile != string(core.SeccompProfileTypeUnconfined) &&
profile != string(core.SeccompProfileTypeRuntimeDefault) &&
profile != string(core.SeccompProfileTypeLocalhost) {
panic(fmt.Errorf("unknown seccomp profile type %s", profile))
}
seccomp = &core.SeccompProfile{
Type: core.SeccompProfileType(profile),
}
})
return seccomp
}
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