console: add lxc.console.buffer.size, lxc.console.buffer.logfile, lxc.console.rotate

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

When a "clear" request is sent to the console ringbuffer we should truncate the
console log file as well.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

The lxc_console_create() function used to munge the ringbuffer setup and the
log file setup already. This made somewhat sense when we didn't have a separate
ringbuffer log file. Now it's just plain confusing. So split this into logical
helpers that future maintainers can understand:

- lxc_console_create_log_file()
- lxc_console_create_ringbuf(console);
- lxc_console_create_ringbuf_log_file(console);
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

If we do it unconditionally a request to only clear the ringbuffer and not read
or write anything will fail.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Determines the size of the ringbuffer.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

console: exit mainloop on SIGTERM

lvm: generate new UUID for xfs + btrfs filesystems

Closes #1909.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

This allows cleanly exiting a console session without control sequences.

Relates to https://github.com/lxc/lxd/pull/4001 .

Note that the existence of a signal handler now doesn't guarantee that ts->node
is allocated. Instead, ts->node will now only be added to if stdinfd is a tty.
New checks need to take that into account.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Non-functional changes to enable handling more signals.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

console: use correct escape sequence check

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

lxccontainer: enable daemonized execute

cgroups/cgfsng: adapt to new cgroup2 delegation

This lets's users run daemonized application containers with our minimal init
as pid 1 and the requested program as pid 2.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

This enables daemonized application containers with our minimal init running as
pid one and the requested program running as second pid.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

console: report detach message on demand

When users pass -1 there's there won't be an escape sequence to exit the
console so no need to print a misleading info message about how to detach.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

console: fix console info message

Hi,

I try to create a Slackware container in a Slackware64 14.2 current and
find that wget depends on libunistring.

So I add libunistring to the package list.

Closes #1915

Signed-off-by: Chia-Chun Hsu a12321aabb@gmail.com
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

Now it will be displayed nicely formatted:

a1 login: chb@conventiont|~
> lxc console a1

Connected to tty 0
Type <Ctrl+a q> to exit the console, <Ctrl+a Ctrl+a> to enter Ctrl+a itself

Ubuntu 17.10 a1 console

a1 login:
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

attach: allow attach with empty conf

lxc-oci: correctly handle --url

Fix: #1898
Signed-off-by: Felix Abecassis <fabecassis@nvidia.com>

First tools/ refactor for review

Signed-off-by: Austin Reichert <austinskyreichert@utexas.edu>

lxc-test-unpriv: fix the overlayfs mount error

API: add console ringbuffer extension

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

This patch fixes the missing workdir issue for the overlayfs mount command in
the lxc-test-unpriv test.

Bug link: https://bugs.launchpad.net/bugs/1730915Signed-off-by: Po-Hsu Lin <po-hsu.lin@canonical.com>

In order to enable proper unprivileged cgroup delegation on newer kernels we not
just need to delegate the "cgroup.procs" file but also "cgroup.threads". But
don't report an error in case it doesn't exist. Also delegate
"cgroup.subtree_control" to enable delegation of controllers to descendant
cgroups.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

cgroups/cgfsng: fixes, features, and improved cgroup2 handling

storage: switch to ext4 as default fs

attach: handle namespace inheritance

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>