NOTE: This will be a shared mount, due to root being turned into a
shared with `MC_REC` set: `mount("", "/", "", rec|shared, "")`.
For some reason setting `shared` when mounting `/sys/fs/bpf` doesn't
work at all, perhaps that's just a kernel feature.
Signed-off-by: Ilya Dmitrichenko <errordeveloper@gmail.com>
- use the mkimage hashes that we had in LinuxKit as more up to date than tool.
- update docs
- move the code from moby under src/cmd/linuxkit
Signed-off-by: Justin Cormack <justin@specialbusservice.com>
When logging directly to files (the not-using-memlogd case) the onboot
services must log to /run/log because /var/log might be overmounted
by a persistent disk. Therefore we create a symlink at the end of
the onboot section.
When logging via memlogd, all logs are buffered until a logwrite service
starts, so no symlink is needed.
Signed-off-by: David Scott <dave.scott@docker.com>
If external logging is enabled, this patch sets the stdout and stderr
of the `runc` invocations to one end of a socketpair and the other end is
sent to the logging service. Otherwise we log to files as before.
Signed-off-by: David Scott <dave.scott@docker.com>
An external logging system exists if the socket
/var/run/linuxkit-external-logging.sock
exists.
If an external logging system is enabled then create FIFOs for
containerd and send the other end of the FIFOs to the logging service.
Otherwise use /var/log files as before.
Signed-off-by: David Scott <dave.scott@docker.com>
When busybox's reboot processing occurs in init, it runs all SHUTDOWN
actions that are defined in inittab. Once those are complete, it will
trigger either a halt, poweroff, or reboot, depending upon what signal
is received. The mechanism that's used to shell out through inittab
does not allow us to pass through exactly which invocation was
requested.
Due to the way that rc.shutdown works, it invokes the poweroff action
for any and all SHUTDOWN callbacks, whether they're a reboot, poweroff,
or halt. Instead of handling the reboot(2) syscall in rc.shutdown,
return after killing and unmounting and let busybox's init process
decide which reboot(2) action to use.
Signed-off-by: Krister Johansen <krister.johansen@oracle.com>
Since we are building containerd v1.1.0 with go 1.10 (as it requires) to the
same for init and runc too for consistency. In the case of init it is actually
required since we use the containerd client library there.
The subreaper interfaces have been removed from containerd and replaced with a
similar interface in runc/libcontainer, update init to use that now.
Signed-off-by: Ian Campbell <ijc@docker.com>
$ git diff linuxkit.yml
diff --git a/linuxkit.yml b/linuxkit.yml
index e2ec829db..21b84e4ad 100644
--- a/linuxkit.yml
+++ b/linuxkit.yml
@@ -1,6 +1,6 @@
kernel:
image: linuxkit/kernel:4.14.32
- cmdline: "console=tty0 console=ttyS0 console=ttyAMA0"
+ cmdline: "console=ttyS0 console=foobar"
init:
- linuxkit/init:v0.3
- linuxkit/runc:v0.3
$ linuxkit build linuxkit.yml
[...]
$ linuxkit run linuxkit
[...]
getty: cmdline has console=foobar but /dev/foobar is not a character device; not starting getty for foobar
linuxkit-2ae2c420a11c login: root (automatic login)
Welcome to LinuxKit!
NOTE: This system is namespaced.
The namespace you are currently in may not be the root.
(ns: getty) linuxkit-2ae2c420a11c:~# ls -l /proc/1/root/dev/foobar
-rw-r--r-- 1 root root 311 Apr 9 13:19 /proc/1/root/dev/foobar
(ns: getty) linuxkit-2ae2c420a11c:~# cat /proc/1/root/dev/foobar
Welcome to LinuxKit
## .
## ## ## ==
## ## ## ## ## ===
/"""""""""""""""""\___/ ===
{ / ===-
\______ O __/
\ \ __/
\____\_______/
Also added quotes around $tty for good measure.
Signed-off-by: Ian Campbell <ijc@docker.com>
