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fix(cli/clistat): improve detection of container environment #8643

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Merged
merged 2 commits into from
Jul 21, 2023
+12 −3
Merged

fix(cli/clistat): improve detection of container environment #8643

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f2c1c51
fix(cli/clistat): improve detection of container environment
johnstcn Jul 21, 2023
a13f624
appease the over-cautious secrets detector
johnstcn Jul 21, 2023
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2 changes: 1 addition & 1 deletion cli/clistat/cgroup.go
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Original file line number Diff line number Diff line change
Expand Up @@ -338,7 +338,7 @@ func readInt64Prefix(fs afero.Fs, path, prefix string) (int64, error) {

scn := bufio.NewScanner(bytes.NewReader(data))
for scn.Scan() {
line := scn.Text()
line := strings.TrimSpace(scn.Text())
if !strings.HasPrefix(line, prefix) {
continue
}
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13 changes: 11 additions & 2 deletions cli/clistat/container.go
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Expand Up @@ -10,8 +10,9 @@ import (
)

const (
procMounts = "/proc/mounts"
procOneCgroup = "/proc/1/cgroup"
procMounts = "/proc/mounts"
procOneCgroup = "/proc/1/cgroup"
kubernetesDefaultServiceAccountToken = "/var/run/secrets/kubernetes.io/serviceaccount/token" //nolint:gosec
)

// IsContainerized returns whether the host is containerized.
Expand All @@ -38,6 +39,14 @@ func IsContainerized(fs afero.Fs) (ok bool, err error) {
}
}

// Sometimes the above method of sniffing /proc/1/cgroup isn't reliable.
// If a Kubernetes service account token is present, that's
// also a good indication that we are in a container.
_, err = afero.ReadFile(fs, kubernetesDefaultServiceAccountToken)
if err == nil {
return true, nil
}

// Last-ditch effort to detect Sysbox containers.
// Check if we have anything mounted as type sysboxfs in /proc/mounts
mountsData, err := afero.ReadFile(fs, procMounts)
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