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specgen: fix order for setting rlimits

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Also make sure that the limits we set for rootless are not higher than
what we'd set for root containers.

Rootless containers failed to start when the calling user already
had ulimit (e.g. on NOFILE) set.

This is basically a cherry-pick of 76f8efc0d0d into specgen

Signed-off-by: Ralf Haferkamp <rhafer@suse.com>
This commit is contained in:
Ralf Haferkamp
2020-06-26 11:14:35 +02:00
parent bb11b42879
commit 43c19966f6
1 changed files with 14 additions and 6 deletions
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20
pkg/specgen/generate/oci.go
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@ -52,10 +52,14 @@ func addRlimits(s *specgen.SpecGenerator, g *generate.Generator) error {
if err := unix.Getrlimit(unix.RLIMIT_NOFILE, &rlimit); err != nil {
logrus.Warnf("failed to return RLIMIT_NOFILE ulimit %q", err)
}
current = rlimit.Cur
max = rlimit.Max
if rlimit.Cur < current {
current = rlimit.Cur
}
if rlimit.Max < max {
max = rlimit.Max
}
}
g.AddProcessRlimits("RLIMIT_NOFILE", current, max)
g.AddProcessRlimits("RLIMIT_NOFILE", max, current)
}
if !nprocSet {
max := kernelMax
@ -65,10 +69,14 @@ func addRlimits(s *specgen.SpecGenerator, g *generate.Generator) error {
if err := unix.Getrlimit(unix.RLIMIT_NPROC, &rlimit); err != nil {
logrus.Warnf("failed to return RLIMIT_NPROC ulimit %q", err)
}
current = rlimit.Cur
max = rlimit.Max
if rlimit.Cur < current {
current = rlimit.Cur
}
if rlimit.Max < max {
max = rlimit.Max
}
}
g.AddProcessRlimits("RLIMIT_NPROC", current, max)
g.AddProcessRlimits("RLIMIT_NPROC", max, current)
}
return nil