daemon.generateNewName() already reserves the generated name, but its name
did not indicate it did. The daemon.registerName() assumed that the generated
name still had to be reserved, which could mean it would try to reserve the
same name again.
This patch renames daemon.generateNewName to daemon.generateAndReserveName
to make it clearer what it does, and updates registerName() to return early
if it successfully generated (and registered) the container name.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Instead of having to create a bunch of custom error types that are doing
nothing but wrapping another error in sub-packages, use a common helper
to create errors of the requested type.
e.g. instead of re-implementing this over and over:
```go
type notFoundError struct {
cause error
}
func(e notFoundError) Error() string {
return e.cause.Error()
}
func(e notFoundError) NotFound() {}
func(e notFoundError) Cause() error {
return e.cause
}
```
Packages can instead just do:
```
errdefs.NotFound(err)
```
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Commit ebcb7d6b40 removed string checking
for error messages, in favor of typed errors.
In this change, the status code for conflicting container names
changed from 409 to 400 (validationError).
This patch add a `nameConflictError`, changing the status code to
409 as it was in older versions.
With this change applied, the correct 409 status is returned:
```bash
$ docker create --name c1 busybox
```
```bash
$ curl --unix-socket /var/run/docker.sock -v -XPOST -H"Content-Type: application/json" -d'{"Image":"busybox"}' http://localhost/containers/create?name=c1
Note: Unnecessary use of -X or --request, POST is already inferred.
* Trying /var/run/docker.sock...
* Connected to localhost (/var/run/docker.sock) port 80 (#0)
> POST /containers/create?name=c1 HTTP/1.1
> Host: localhost
> User-Agent: curl/7.52.1
> Accept: */*
> Content-Type: application/json
> Content-Length: 19
>
* upload completely sent off: 19 out of 19 bytes
< HTTP/1.1 409 Conflict
< Api-Version: 1.33
< Content-Type: application/json
< Docker-Experimental: false
< Ostype: linux
< Server: Docker/17.06.0-dev (linux)
< Date: Thu, 28 Sep 2017 15:07:23 GMT
< Content-Length: 229
<
{"message":"Conflict. The container name \"/c1\" is already in use by container \"ed2efdc806c1883954e677eb9ab8cbc7e286c9c5934ef6724fd5d93c56744923\". You have to remove (or rename) that container to be able to reuse that name."}
* Curl_http_done: called premature == 0
* Connection #0 to host localhost left intact
```
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Use strongly typed errors to set HTTP status codes.
Error interfaces are defined in the api/errors package and errors
returned from controllers are checked against these interfaces.
Errors can be wraeped in a pkg/errors.Causer, as long as somewhere in the
line of causes one of the interfaces is implemented. The special error
interfaces take precedence over Causer, meaning if both Causer and one
of the new error interfaces are implemented, the Causer is not
traversed.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Currently, names are maintained by a separate system called "registrar".
This means there is no way to atomically snapshot the state of
containers and the names associated with them.
We can add this atomicity and simplify the code by storing name
associations in the memdb. This removes the need for pkg/registrar, and
makes snapshots a lot less expensive because they no longer need to copy
all the names. This change also avoids some problematic behavior from
pkg/registrar where it returns slices which may be modified later on.
Note that while this change makes the *snapshotting* atomic, it doesn't
yet do anything to make sure containers are named at the same time that
they are added to the database. We can do that by adding a transactional
interface, either as a followup, or as part of this PR.
Signed-off-by: Aaron Lehmann <aaron.lehmann@docker.com>
State will be saved on the following operation once the container is
properly registered on the daemon.
Signed-off-by: Fabio Kung <fabio.kung@gmail.com>
Use quoted form of container name and container id to improve copy-paste avoiding the extra `.` that slips into the clipboard
Signed-off-by: Jorge Marin <chipironcin@users.noreply.github.com>
This fix tries to address the issue raised in 28769 where
checkpoint name was not checked before passing to containerd.
As a result, it was possible to use a special checkpoint name
to get outside of the container's directory.
This fix add restriction `[a-zA-Z0-9][a-zA-Z0-9_.-]+` (`RestrictedNamePattern`).
This is the same as container name restriction.
This fix fixes 28769.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
