My pull request failed the build due to gofmat issues. I have run gofmt
on specified files and this commit fixes it.
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Upstream-commit: ff56531de47c08157b2a37e6c6b6189a5006dba2
Component: engine
The way thin-pool right now is designed, user space is supposed to keep
track of what device ids have already been used. If user space tries to
create a new thin/snap device and device id has already been used, thin
pool retuns -EEXIST.
Upon receiving -EEXIST, current docker implementation simply tries the
NextDeviceId++ and keeps on doing this till it finds a free device id.
This approach has two issues.
- It is little suboptimal.
- If device id already exists, current kenrel implementation spits out
a messsage on console.
[17991.140135] device-mapper: thin: Creation of new snapshot 33 of device 3 failed.
Here kenrel is trying to tell user that device id 33 has already been used.
And this shows up for every device id docker tries till it reaches a point
where device ids are not used. So if there are thousands of container and
one is trying to create a new container after fresh docker start, expect
thousands of such warnings to flood console.
This patch saves the NextDeviceId in a file in
/var/lib/docker/devmapper/metadata/deviceset-metadata and reads it back
when docker starts. This way we don't retry lots of device ids which
have already been used.
There might be some device ids which are free but we will get back to them
once device numbers wrap around (24bit limit on device ids).
This patch should cut down on number of kernel warnings.
Notice that I am creating a deviceset metadata file which is a global file
for this pool. So down the line if we need to save more data we should be
able to do that.
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Upstream-commit: 8c9e5e5e05f8ddfcf8cd5218edb83d9fe8238d81
Component: engine
I was trying to save nextDeviceId to a file but it would not work and
json.Marshal() will do nothing. Then some search showed that I need to
make first letter of struct field capital, exporting this field and
now json.Marshal() works.
This is a preparatory patch for the next one.
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Upstream-commit: 8e9a18039be6ade0b8db65f7f298959055d86192
Component: engine
Currently we save device metadata and have a helper function saveMetadata()
which converts data in json format as well as saves it to file. For
converting data in json format, one needs to know what is being saved.
Break this function down in two functions. One function only has file
write capability and takes in argument about byte array of json data.
Now this function does not have to know what data is being saved. It
only knows about a stream of json data is being saved to a file.
This allows me to reuse this function to save a different type of
metadata. In this case I am planning to save NextDeviceId so that
docker can use this device Id upon next restart. Otherwise docker
starts from 0 which is suboptimal.
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Upstream-commit: 67fbd34d8379a1b8232aea5d126a389f64bdc59a
Component: engine
This removes the pull of the hello-world image from install.sh to
address privacy concerns.
Docker-DCO-1.1-Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com> (github: unclejack)
Upstream-commit: f9d80712d9417feadd63cb71c0c7825c4e9f9fd4
Component: engine
The argument specified the json data to save to disk when registering
a new image into the image graph. If it is nil, then the given image
is serialized to json and that is written by default. This default
behavior is sufficient if the given image was originally deserialzed
from this jsonData to begin with which has always been the case.
Signed-off-by: Josh Hawn <josh.hawn@docker.com> (github: jlhawn)
Upstream-commit: 26184de8ab1dfe812094c55c9becd8ebb60ed7be
Component: engine
The Hub no longer accepts short descriptions over 100 characters.
Signed-off-by: Andrew Page <admwiggin@gmail.com>
Upstream-commit: 693b9d335cc1fe688a7fffb62e5da97a5d5a3b13
Component: engine
E.g. "docker foobar run" would have printed "Command not found:
foobar" and printed the help text for "run". It should instead
print the root help message for docker.
Signed-off-by: Ben Firshman <ben@firshman.co.uk>
Upstream-commit: ef004ec03fe5aad33da7d53f196f16382c750d07
Component: engine
Vivek Goyal
James Turnbull
unclejack
Sven Dowideit
Tibor Vass
Doug Davis
Nathan Hsieh
Tianon Gravi
Vincent Batts
Solomon Hykes
unclejack
Alexandr Morozov
Bert Goethals
Jessie Frazelle
Arnaud Porterie
Malte Janduda
Jessica Frazelle
Josh Hawn
Fred Lifton
Michael Crosby
Alexandr Morozov
Ben Firshman