`make DOCKERD_ARGS=--init binary run` should start the daemon with
`--init` as flags (with any other "automagically" added ones).
Signed-off-by: Vincent Demeester <vincent@sbr.pm>
This makes it a bit simpler to remove this interface for v2 plugins
and not break external projects (libnetwork and swarmkit).
Note that before we remove the `Client()` interface from `CompatPlugin`
libnetwork and swarmkit must be updated to explicitly check for the v1
client interface as is done int his PR.
This is just a minor tweak that I realized is needed after trying to
implement the needed changes on libnetwork.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
This fix adds `t.Name()` to tests in integration/network
so that services created in those tests have unique names.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
Begin to copy the data until the command to exit and any coping to
stdin or copy from stdout/stderr has completed.
Also adding defense code to trim the possible '\x00' null value.
Signed-off-by: Dennis Chen <dennis.chen@arm.com>
`${}`, `${:}` and so on are invalid because there's
no parameter within the brackets; fix detection for
this situation and add/update tests.
There were some existing test-cases that were testing
for the wrong behavior, which are now updated.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
The builder did not detect syntax errors in substitusions in the
Dockerfile, causing those values to be processed incorrectly instead of
producing an error.
Example 1: missing `}`
docker build --no-cache -<<'EOF'
FROM busybox
ARG var=${aaa:-bbb
RUN echo $var
EOF
Before:
Step 3/3 : RUN echo $var
---> Running in f06571e77146
bbb
After:
Step 2/3 : ARG var=${aaa:-bbb
failed to process "${aaa:-bbb": syntax error: missing '}'
Example 2: missing closing `}`, no default value
docker build --no-cache -<<'EOF'
FROM busybox
ARG var=${aaa
RUN echo $var
EOF
Before:
Step 2/3 : ARG var=${aaa
failed to process "${aaa": missing ':' in substitution
After:
Step 2/3 : ARG var=${aaa
failed to process "${aaa": syntax error: missing '}'
Example 3: double opening bracket (`{`)
docker build --no-cache -<<'EOF'
FROM busybox
ARG var=${{aaa:-bbb}
RUN echo $var
EOF
Before:
Step 2/3 : ARG var=${{aaa:-bbb}
failed to process "${{aaa:-bbb}": missing ':' in substitution
After:
Step 2/3 : ARG var=${{aaa:-bbb}
failed to process "${{aaa:-bbb}": syntax error: bad substitution
Example 4: double opening bracket (`{`), no default value
docker build --no-cache -<<'EOF'
FROM busybox
ARG var=${{aaa}
RUN echo $var
EOF
Before:
Step 2/3 : ARG var=${{aaa}
failed to process "${{aaa}": missing ':' in substitution
After:
Step 2/3 : ARG var=${{aaa}
failed to process "${{aaa}": syntax error: bad substitution
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
If "ps" fails, in many cases it prints a meaningful error message
which a user can benefit from. Let's use it.
While at it, let's use errdefs.System to classify the error,
as well as errors.Wrap.
Before:
> $ docker top $CT <any bad ps options>
> Error response from daemon: Error running ps: exit status 1
After:
> $ docker top $CT auxm
> Error response from daemon: ps: error: thread display conflicts with forest display
or
> $ docker top $CT saur
> Error response from daemon: ps: error: conflicting format options
or, if there's no meaningful error on stderr, same as before:
> $ docker top $CT 1234
> Error response from daemon: ps: exit status 1
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Current ContainerTop (a.k.a. docker top) implementation uses "ps"
to get the info about *all* running processes, then parses it, then
filters the results to only contain PIDs used by the container.
Collecting data only to throw most of it away is inefficient,
especially on a system running many containers (or processes).
For example, "docker top" on a container with a single process
can take up to 0.5 seconds to execute (on a mostly idle system)
which is noticeably slow.
Since the containers PIDs are known beforehand, let's use ps's
"-q" option to provide it with a list of PIDs we want info about.
The problem with this approach is, some ps options can't be used
with "-q" (the only one I'm aware of is "f" ("forest view") but
there might be more). As the list of such options is not known,
in case ps fails, it is executed again without "q" (retaining
the old behavior).
Next, the data produced by "ps" is filtered in the same way as before.
The difference here is, in case "-q" worked, the list is much shorter.
I ran some benchmarks on my laptop, with about 8000 "sleep" processes
running to amplify the savings.
The improvement in "docker top" execution times is 5x to 10x (roughly
0.05s vs 0.5s).
The improvement in ContainerTop() execution time is up to 100x
(roughly 3ms vs 300ms).
I haven't measured the memory or the CPU time savings, guess those
are not that critical.
NOTE that busybox ps does not implement -q so the fallback is always
used, but AFAIK it is not usable anyway and Docker expects a normal
ps to be on the system (say the list of fields produced by
"busybox ps -ef" differs from normal "ps -ef" etc.).
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
This fix was not yet included in Docker 17.05, so
API version v1.37 was not the right selector (Docker
18.03, 18.04 and 18.05 all support API v1.37).
We should change these checks for engine versions,
or use a different method to skip tests when running
against older engines.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
