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hostinfo: detect being run in a container in more ways

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Change-Id: I038ff7705ba232e6cf8dcc9775357ef708d43762
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick 2022-09-11 21:45:08 -07:00 committed by Brad Fitzpatrick
parent d5e7e3093d
commit 16939f0d56
1 changed files with 9 additions and 0 deletions
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9
hostinfo/hostinfo.go
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@ -229,6 +229,15 @@ func inContainer() opt.Bool {
} }
var ret opt.Bool var ret opt.Bool
ret.Set(false) ret.Set(false)
if _, err := os.Stat("/.dockerenv"); err == nil {
ret.Set(true)
return ret
}
if _, err := os.Stat("/run/.containerenv"); err == nil {
// See https://github.com/cri-o/cri-o/issues/5461
ret.Set(true)
return ret
}
lineread.File("/proc/1/cgroup", func(line []byte) error { lineread.File("/proc/1/cgroup", func(line []byte) error {
if mem.Contains(mem.B(line), mem.S("/docker/")) || if mem.Contains(mem.B(line), mem.S("/docker/")) ||
mem.Contains(mem.B(line), mem.S("/lxc/")) { mem.Contains(mem.B(line), mem.S("/lxc/")) {