We don't want to block on accepting the terminal fd, because then
we can't detect if runc died before calling out to pass the terminal
fd. To handle this we spin the glib mainloop listening to both the
terminal accept fd and a child pid watch.
Signed-off-by: Alexander Larsson <alexl@redhat.com>
A goroutine is started to forward terminal resize requests
from the resize channel. Also, data is copied back/forth
between stdin, stdout, stderr streams and the attach socket
for the container.
Signed-off-by: Mrunal Patel <mpatel@redhat.com>
The bug is silly if you have a master/node cluster where node is on a
different machine than the master.
The current behavior is to give our addresses like "0.0.0.0:10101". If
you run "kubectl exec ..." from another host, that's not going to work
since on a different host 0.0.0.0 resolves to localhost and kubectl
exec fails with:
error: unable to upgrade connection: 404 page not found
This patch fixes the above by giving our correct addresses for reaching
from outside.
Signed-off-by: Antonio Murdaca <runcom@redhat.com>
conmon.c fails to build on Ubuntu:
cc -std=c99 -Os -Wall -Wextra -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -c -o conmon.o conmon.c
In file included from /usr/include/fcntl.h:289:0,
from conmon.c:4:
In function ‘open’,
inlined from ‘main’ at conmon.c:519:10:
/usr/include/x86_64-linux-gnu/bits/fcntl2.h:50:4: error: call to ‘__open_missing_mode’ declared with attribute error: open with O_CREAT or O_TMPFILE in second argument needs 3 arguments
__open_missing_mode ();
^
<builtin>: recipe for target 'conmon.o' failed
make[1]: *** [conmon.o] Error 1
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This is not actually read uninitialized, its just that the compiler
can't detect this, but we initilize it anyway to silence the compiler.
Signed-off-by: Alexander Larsson <alexl@redhat.com>
This is what the other C code uses, and its nice to have as adding
any optimization flags enables a bunch of more warnings.
Signed-off-by: Alexander Larsson <alexl@redhat.com>
json-glib is a fine library for parsing json. However, all we need
to do is generate some trivial json output, so it is not needed.
Signed-off-by: Alexander Larsson <alexl@redhat.com>
We want to avoid inheriting these into the child. Doing so is both
confusing for the child, and a potential security issue if the
container has access to FDs that are from the outside of the
container.
Some of these are created after we fork for the child, so they
are not technically necessary. However, its best to do this as
we may change the code in the future and forget about this.
Signed-off-by: Alexander Larsson <alexl@redhat.com>
This means we don't have to spawn via a shell, but it also
means we do the right thing for any input that would have
needed to be escaped. For instance if the container name had
a $ in i, or even worse, a back-quote!
Signed-off-by: Alexander Larsson <alexl@redhat.com>
The buffer is used to read from the stderr/stdout stream, which
can easily be larger than 256 bytes. With a larger buffer we will
do fewer, larger reads, which is more efficient. And 8k more stack
size use is not really a problem.
Signed-off-by: Alexander Larsson <alexl@redhat.com>
The code as is doesn't handle merged controllers.
For instance, I have this in my /proc/self/cgrous:
4:cpu,cpuacct:/user.slice/user-0.slice/session-4.scope
The current code fails to match "cpuacct" wit this line, and
additionally it just does a prefix match so if you were looking
for say "cpu", it would match this:
2:cpuset:/
I also removed some ninfo spew that didn't seem very useful.
Signed-off-by: Alexander Larsson <alexl@redhat.com>
Rather than writing the logs with one write per line, use writev()
to write multiple lines in one call. Additionally, this avoids
using dprintf() when writing to the log, which is nice because that
doesn't correctly handle partial writes or ENOINTR.
This also changes set_k8s_timestamp to add the pipe to the reused
buffer so that we don't have to append it on each line.
Signed-off-by: Alexander Larsson <alexl@redhat.com>
Any write could be interupted by EINTR if we get some kind of signal,
which means we could be either reporting a EINTR error or a partial
write (if some data was written). Its also generally good to handle
partial writes correctly, as they can happen e.g. when writing to
full pipes.
Signed-off-by: Alexander Larsson <alexl@redhat.com>
Some runtimes like Clear Containers need to interpret the CRI-O
annotations, to distinguish the infra container from the regular one.
Here we export those annotations and use a more standard dotted
namespace for them.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
