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proc: detect kubernetes runtime by mounts #2054

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merged 1 commit into from
Apr 18, 2022
Merged

proc: detect kubernetes runtime by mounts #2054

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10 changes: 10 additions & 0 deletions pkg/util/proc/proc.go
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Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,7 @@ import (
"fmt"
"io/ioutil"
"os"
"regexp"
"strings"
)

Expand Down Expand Up @@ -140,6 +141,13 @@ func GetContainerRuntime(tgid, pid int) ContainerRuntime {
return runtime
}

// Docker was not detected at this point.
// An overlay mount on "/" may indicate we're under containerd or other runtime.
a = readFileString("/proc/mounts")
if m, _ := regexp.MatchString("^[^ ]+ / overlay", a); m {
return RuntimeKubernetes
}

return RuntimeNotFound
}

Expand All @@ -154,6 +162,8 @@ func detectContainerFiles() ContainerRuntime {
{RuntimePodman, "/run/.containerenv"},
// https://github.com/moby/moby/issues/18355
{RuntimeDocker, "/.dockerenv"},
// Detect the presence of a serviceaccount secret mounted in the default location
{RuntimeKubernetes, "/var/run/secrets/kubernetes.io/serviceaccount"},
}

for i := range files {
Expand Down