Fixes#18864, #20648, #33561, #40901.
[This GH comment][1] makes clear network name uniqueness has never been
enforced due to the eventually consistent nature of Classic Swarm
datastores:
> there is no guaranteed way to check for duplicates across a cluster of
> docker hosts.
And this is further confirmed by other comments made by @mrjana in that
same issue, eg. [this one][2]:
> we want to adopt a schema which can pave the way in the future for a
> completely decentralized cluster of docker hosts (if scalability is
> needed).
This decentralized model is what Classic Swarm was trying to be. It's
been superseded since then by Docker Swarm, which has a centralized
control plane.
To circumvent this drawback, the `NetworkCreate` endpoint accepts a
`CheckDuplicate` flag. However it's not perfectly reliable as it won't
catch concurrent requests.
Due to this design decision, API clients like Compose have to implement
workarounds to make sure names are really unique (eg.
docker/compose#9585). And the daemon itself has seen a string of issues
due to that decision, including some that aren't fixed to this day (for
instance moby/moby#40901):
> The problem is, that if you specify a network for a container using
> the ID, it will add that network to the container but it will then
> change it to reference the network by using the name.
To summarize, this "feature" is broken, has no practical use and is a
source of pain for Docker users and API consumers. So let's just remove
it for _all_ API versions.
[1]: https://github.com/moby/moby/issues/18864#issuecomment-167201414
[2]: https://github.com/moby/moby/issues/18864#issuecomment-167202589
Signed-off-by: Albin Kerouanton <albinker@gmail.com>
Integration tests will now configure clients to propagate traces as well
as create spans for all tests.
Some extra changes were needed (or desired for trace propagation) in the
test helpers to pass through tracing spans via context.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
integration/config/config_test.go:106:31: empty-lines: extra empty line at the end of a block (revive)
integration/secret/secret_test.go:106:31: empty-lines: extra empty line at the end of a block (revive)
integration/network/service_test.go:58:50: empty-lines: extra empty line at the end of a block (revive)
integration/network/service_test.go:401:58: empty-lines: extra empty line at the end of a block (revive)
integration/system/event_test.go:30:38: empty-lines: extra empty line at the end of a block (revive)
integration/plugin/logging/read_test.go:19:41: empty-lines: extra empty line at the end of a block (revive)
integration/service/list_test.go:30:48: empty-lines: extra empty line at the end of a block (revive)
integration/service/create_test.go:400:46: empty-lines: extra empty line at the start of a block (revive)
integration/container/logs_test.go:156:42: empty-lines: extra empty line at the end of a block (revive)
integration/container/daemon_linux_test.go:135:44: empty-lines: extra empty line at the end of a block (revive)
integration/container/restart_test.go:160:62: empty-lines: extra empty line at the end of a block (revive)
integration/container/wait_test.go:181:47: empty-lines: extra empty line at the end of a block (revive)
integration/container/restart_test.go:116:30: empty-lines: extra empty line at the end of a block (revive)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Older versions of Go don't format comments, so committing this as
a separate commit, so that we can already make these changes before
we upgrade to Go 1.19.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Looks like this test was broken from the start, and fully relied on a race
condition. (Test was added in 65ee7fff02)
The problem is in the service's command: `ls -l /etc/config || /bin/top`, which
will either:
- exit immediately if the secret is mounted correctly at `/etc/config` (which it should)
- keep running with `/bin/top` if the above failed
After the service is created, the test enters a race-condition, checking for 1
task to be running (which it ocassionally is), after which it proceeds, and looks
up the list of tasks of the service, to get the log output of `ls -l /etc/config`.
This is another race: first of all, the original filter for that task lookup did
not filter by `running`, so it would pick "any" task of the service (either failed,
running, or "completed" (successfully exited) tasks).
In the meantime though, SwarmKit kept reconciling the service, and creating new
tasks, so even if the test was able to get the ID of the correct task, that task
may already have been exited, and removed (task-limit is 5 by default), so only
if the test was "lucky", it would be able to get the logs, but of course, chances
were likely that it would be "too late", and the task already gone.
The problem can be easily reproduced when running the steps manually:
echo 'CONFIG' | docker config create myconfig -
docker service create --config source=myconfig,target=/etc/config,mode=0777 --name myservice busybox sh -c 'ls -l /etc/config || /bin/top'
The above creates the service, but it keeps retrying, because each task exits
immediately (followed by SwarmKit reconciling and starting a new task);
mjntpfkkyuuc1dpay4h00c4oo
overall progress: 0 out of 1 tasks
1/1: ready [======================================> ]
verify: Detected task failure
^COperation continuing in background.
Use `docker service ps mjntpfkkyuuc1dpay4h00c4oo` to check progress.
And checking the tasks for the service reveals that tasks exit cleanly (no error),
but _do exit_, so swarm just keeps up reconciling, and spinning up new tasks;
docker service ps myservice --no-trunc
ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS
2wmcuv4vffnet8nybg3he4v9n myservice.1 busybox:latest@sha256:f7ca5a32c10d51aeda3b4d01c61c6061f497893d7f6628b92f822f7117182a57 docker-desktop Ready Ready less than a second ago
5p8b006uec125iq2892lxay64 \_ myservice.1 busybox:latest@sha256:f7ca5a32c10d51aeda3b4d01c61c6061f497893d7f6628b92f822f7117182a57 docker-desktop Shutdown Complete less than a second ago
k8lpsvlak4b3nil0zfkexw61p \_ myservice.1 busybox:latest@sha256:f7ca5a32c10d51aeda3b4d01c61c6061f497893d7f6628b92f822f7117182a57 docker-desktop Shutdown Complete 6 seconds ago
vsunl5pi7e2n9ol3p89kvj6pn \_ myservice.1 busybox:latest@sha256:f7ca5a32c10d51aeda3b4d01c61c6061f497893d7f6628b92f822f7117182a57 docker-desktop Shutdown Complete 11 seconds ago
orxl8b6kt2l6dfznzzd4lij4s \_ myservice.1 busybox:latest@sha256:f7ca5a32c10d51aeda3b4d01c61c6061f497893d7f6628b92f822f7117182a57 docker-desktop Shutdown Complete 17 seconds ago
This patch changes the service's command to `sleep`, so that a successful task
(after successfully performing `ls -l /etc/config`) continues to be running until
the service is deleted. With that change, the service should (usually) reconcile
immediately, which removes the race condition, and should also make it faster :)
This patch changes the tests to use client.ServiceLogs() instead of using the
service's tasklist to directly access container logs. This should also fix some
failures that happened if some tasks failed to start before reconciling, in which
case client.TaskList() (with the current filters), could return more tasks than
anticipated (as it also contained the exited tasks);
=== RUN TestCreateServiceSecretFileMode
create_test.go:291: assertion failed: 2 (int) != 1 (int)
--- FAIL: TestCreateServiceSecretFileMode (7.88s)
=== RUN TestCreateServiceConfigFileMode
create_test.go:355: assertion failed: 2 (int) != 1 (int)
--- FAIL: TestCreateServiceConfigFileMode (7.87s)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
The io/ioutil package has been deprecated in Go 1.16. This commit
replaces the existing io/ioutil functions with their new definitions in
io and os packages.
Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>
This test has been flaky for a long time, failing with:
--- FAIL: TestInspect (12.04s)
inspect_test.go:39: timeout hit after 10s: waiting for tasks to enter run state. task failed with error: task: non-zero exit (1)
While looking through logs, noticed tasks were started, entering RUNNING stage,
and then exited, to be started again.
state.transition="STARTING->RUNNING"
...
msg="fatal task error" error="task: non-zero exit (1)"
...
state.transition="RUNNING->FAILED"
Looking for possible reasons, first considering network issues (possibly we ran
out of IP addresses or networking not cleaned up), then I spotted the issue.
The service is started with;
Command: []string{"/bin/top"},
Args: []string{"-u", "root"},
The `-u root` is not an argument for the service, but for `/bin/top`. While the
Ubuntu/Debian/GNU version `top` has a -u/-U option;
docker run --rm ubuntu:20.04 top -h 2>&1 | grep '\-u'
top -hv | -bcEHiOSs1 -d secs -n max -u|U user -p pid(s) -o field -w [cols]
The *busybox* version of top does not:
docker run --rm busybox top --help 2>&1 | grep '\-u'
So running `top -u root` would cause the task to fail;
docker run --rm busybox top -u root
top: invalid option -- u
...
echo $?
1
As a result, the service went into a crash-loop, and because the `poll.WaitOn()`
was running with a short interval, in many cases would _just_ find the RUNNING
state, perform the `service inspect`, and pass, but in other cases, it would not
be that lucky, and continue polling untill we reached the 10 seconds timeout,
and mark the test as failed.
Looking for history of this option (was it previously using a different image?) I
found this was added in 6cd6d8646a, but probably
just missed during review.
Given that the option is only set to have "something" to inspect, I replaced
the `-u root` with `-d 5`, which makes top refresh with a 5 second interval.
Note that there is another test (`TestServiceListWithStatuses) that uses the same
spec, however, that test is skipped based on API version of the test-daemon, and
(to be looked into), when performing that check, no API version is known, causing
the test to (always?) be skipped:
=== RUN TestServiceListWithStatuses
--- SKIP: TestServiceListWithStatuses (0.00s)
list_test.go:34: versions.LessThan(testEnv.DaemonInfo.ServerVersion, "1.41")
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
After dicussing with maintainers, it was decided putting the burden of
providing the full cap list on the client is not a good design.
Instead we decided to follow along with the container API and use cap
add/drop.
This brings in the changes already merged into swarmkit.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
The initial implementation followed the Swarm API, where
PidsLimit is located in ContainerSpec. This is not the
desired place for this property, so moving the field to
TaskTemplate.Resources in our API.
A similar change should be made in the SwarmKit API (likely
keeping the old field for backward compatibility, because
it was merged some releases back)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Support for PidsLimit was added to SwarmKit in docker/swarmkit/pull/2415,
but never exposed through the Docker remove API.
This patch exposes the feature in the repote API.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Adds support for ReplicatedJob and GlobalJob service modes. These modes
allow running service which execute tasks that exit upon success,
instead of daemon-type tasks.
Signed-off-by: Drew Erny <drew.erny@docker.com>
Bumps the vendoring of github.com/docker/swarmkit to the above commit,
which is the current master at commit time.
Most notably, this includes a change making the ingress network respect
the default address pool. Because of this change, a change to network
integration tests was needed.
Signed-off-by: Drew Erny <drew.erny@docker.com>
Adds a new ServiceStatus field to the Service object, which includes the
running and desired task counts. This new field is gated behind a
"status" query parameter.
Signed-off-by: Drew Erny <drew.erny@docker.com>
```
Line 25: warning: context.Context should be the first parameter of a function (golint)
Line 44: warning: context.Context should be the first parameter of a function (golint)
Line 52: warning: context.Context should be the first parameter of a function (golint)
```
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Allow specifying environment variables when installing an engine plugin
as a Swarm service. Invalid environment variable entries (without an
equals (`=`) char) will be ignored.
Signed-off-by: Sune Keller <absukl@almbrand.dk>
This fix moves multiple places of serviceRunningTasksCount
to one location in integration/internal/swarm, so that
code duplication could be removed.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
This introduces `NoTasksForService` and `NoTasks` poller checks, that
can be used to check if no tasks are left in general, or for a specific
service.
Some redundant checks were also removed from some tests.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Tests which will re-deploy containers uses function serviceIsUpdated() to
make sure that service update really reached state UpdateStateCompleted.
Tests which will not re-deploy container uses function
serviceSpecIsUpdated to make sure that service version is increased.
Signed-off-by: Olli Janatuinen <olli.janatuinen@gmail.com>
