Since currently the container.json file does not include the pathname
to a container's root filesystem, we need to parse /proc/mounts which
is slow and error-prone. This patch addresses this issue by adding a
new RootFs field.
Signed-off-by: Saied Kazemi <saied@google.com>
Since currently the container.json file does not include the pathname
to a container's root filesystem, we need to parse /proc/mounts which
is slow and error-prone. This patch addresses this issue by adding a
new RootFs field.
Signed-off-by: Saied Kazemi <saied@google.com>
I've added more tests. We now have almost 55% coverage.
I've also reorganized netlink_linux codebase and moved
the non-RTNETLINK functions at the bottom. I've also
added some comments to some functions.
Docker-DCO-1.1-Signed-off-by: Milos Gajdos <milosgajdos83@gmail.com> (github: milosgajdos83)
We calculate this on every cgroup call. It comprised of 30%+ of the CPU
usage in cAdvisor.
Docker-DCO-1.1-Signed-off-by: Victor Marmol <vmarmol@google.com> (github: vmarmol)
Since the caller of os.Lstat in devices.go is a function (not a method),
we use a variable to allow os.Lstat to be substituted during testing.
In this case the variable osLstat is private to the devices package to
prevent abuse. So the testcase needs to reside in the same package.
This commit includes a simple test of GetDevices() using osLstat to
simulate an error being returned from os.Lstat. In this case, the
behaviour of GetDevices() in the error case is trivial, but this may
change.
This is just the beginning of error injection. In future, it may be
necessary to pull out repetitive code sequences into a common file.
Signed-off-by: Steve Powell <spowell@pivotal.io>
Add a rich Error type to the libcontainer package and use it in the API so
that callers can:
* Check for a specific error without depending on an error string,
* Obtain the stack trace of the function or method which detected the error.
The Error type provides a typed error code and a stack trace. The error code
identifies the error and enables the caller to test for it without being
sensitive to changes in the error text. The stack trace identifies the point
at which the error was detected. The combination of error code and stack trace
will enable errors to be diagnosed much more easily and with less guesswork
than when raw string-based errors are used.
The Error type conforms to the error interface and its Error method prints a
short error message. The Detail method provides a verbose error message
including the stack trace.
Notes:
1. There is an unfortunate precedent in the Go standard library which uses
variables to define errors. Checking for a specific error involves a string
comparison and assumes the corresponding variable has not been updated. It is
more robust and efficient to identify errors with integer-based types and
associated constants, although errors should still include a string
description for ease of use by humans.
2. It is not feasible to assign distinct types to Factory and Container
error codes because common errors such as SystemError cannot be declared in
two places and the names of the error codes then need to be decorated. This is
less readable.
Signed-off-by: Steve Powell <spowell@pivotal.io>
add format description for `id` string;
add "invalid format" error for `id` string;
remove initial capitals on references to parameter names;
remove reference to `initialConfig`;
add description of id checking.
Signed-off-by: Steve Powell <spowell@pivotal.io>
Sampling should be done by higher layer in configurable intervals. This
change removes the percentage stat as sampling is required for this.
Docker-DCO-1.1-Signed-off-by: Victor Marmol <vmarmol@google.com> (github: vmarmol)
This makes blkio's GetStats try to read blkio.io_serviced_recursive
first and fall back to read the stats from blkio.throttle in case it
can't. blkio.io_serviced_recursive seems to be available across all
kernels with CFQ enabled.
This closes#165
Signed-off-by: Johannes 'fish' Ziemke <github@freigeist.org>
We need --privileged for apparmor based systems until we have an
apparmor specific flag to set the profile to unconfined.
Signed-off-by: Michael Crosby <michael@docker.com>
Victor Marmol
Hugo Duncan
Malte Janduda
Mrunal Patel
Vishnu Kannan
Michael Crosby
Saied Kazemi
Milos Gajdos
Lewis Marshall
Jonathan Rudenberg
Steve Powell
Glyn Normington
Erik Hollensbe
Michael Crosby
Bernerd Schaefer
Michael Crosby
Rohit Jnagal
Johannes 'fish' Ziemke