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| author | Sebastiaan van Stijn <github@gone.nl> | 2016-04-15 14:33:56 +0200 |
|---|---|---|
| committer | Sebastiaan van Stijn <github@gone.nl> | 2016-04-15 14:33:56 +0200 |
| commit | 51b23d88422918c24291f5876df35f91b23a446a (patch) | |
| tree | 2ae649e02f1bc1f3b593b112bb0c82eee64c722c | |
| parent | 172ca1ca8c4d5157789feb97a6424104b81a3479 (diff) | |
| download | docker-51b23d88422918c24291f5876df35f91b23a446a.tar.gz | |
Produce fatal error when running on kernel < 3.10.0
Running on kernel versions older than 3.10 has not been
supported for a while (as it's known to be unstable).
With the containerd integration, this has become more
apparent, because kernels < 3.4 don't support PR_SET_CHILD_SUBREAPER,
which is required for containerd-shim to run.
Change the previous "warning" to a "fatal" error, so
that we refuse to start.
There's still an escape-hatch for users by setting
"DOCKER_NOWARN_KERNEL_VERSION=1" so that they can
run "at their own risk".
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
| -rw-r--r-- | daemon/daemon_unix.go | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/daemon/daemon_unix.go b/daemon/daemon_unix.go index ae0fa35cfc..ce59adbd3c 100644 --- a/daemon/daemon_unix.go +++ b/daemon/daemon_unix.go @@ -267,10 +267,12 @@ func checkKernel() error { // without actually causing a kernel panic, so we need this workaround until // the circumstances of pre-3.10 crashes are clearer. // For details see https://github.com/docker/docker/issues/407 + // Docker 1.11 and above doesn't actually run on kernels older than 3.4, + // due to containerd-shim usage of PR_SET_CHILD_SUBREAPER (introduced in 3.4). if !checkKernelVersion(3, 10, 0) { v, _ := kernel.GetKernelVersion() if os.Getenv("DOCKER_NOWARN_KERNEL_VERSION") == "" { - logrus.Warnf("Your Linux kernel version %s can be unstable running docker. Please upgrade your kernel to 3.10.0.", v.String()) + logrus.Fatalf("Your Linux kernel version %s is not supported for running docker. Please upgrade your kernel to 3.10.0 or newer.", v.String()) } } return nil |