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>
Makes sure that debug endpoints are always available, which will aid in
debugging demon issues.
Wraps debug endpoints in the middleware chain so the can be blocked by
authz.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Signed-off-by: Victor Vieux <vieux@docker.com>
update cobra and use Tags
Signed-off-by: Victor Vieux <vieux@docker.com>
allow client to talk to an older server
Signed-off-by: Victor Vieux <vieux@docker.com>
This fix tries to fix logrus formatting by removing `f` from
`logrus.[Error|Warn|Debug|Fatal|Panic|Info]f` when formatting string
is not present.
This fix fixes#23459.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
This makes separating middlewares from the core api easier.
As an example, the authorization middleware is moved to
it's own package.
Initialize all static middlewares when the server is created, reducing
allocations every time a route is wrapper with the middlewares.
Signed-off-by: David Calavera <david.calavera@gmail.com>
Moving all strings to the errors package wasn't a good idea after all.
Our custom implementation of Go errors predates everything that's nice
and good about working with errors in Go. Take as an example what we
have to do to get an error message:
```go
func GetErrorMessage(err error) string {
switch err.(type) {
case errcode.Error:
e, _ := err.(errcode.Error)
return e.Message
case errcode.ErrorCode:
ec, _ := err.(errcode.ErrorCode)
return ec.Message()
default:
return err.Error()
}
}
```
This goes against every good practice for Go development. The language already provides a simple, intuitive and standard way to get error messages, that is calling the `Error()` method from an error. Reinventing the error interface is a mistake.
Our custom implementation also makes very hard to reason about errors, another nice thing about Go. I found several (>10) error declarations that we don't use anywhere. This is a clear sign about how little we know about the errors we return. I also found several error usages where the number of arguments was different than the parameters declared in the error, another clear example of how difficult is to reason about errors.
Moreover, our custom implementation didn't really make easier for people to return custom HTTP status code depending on the errors. Again, it's hard to reason about when to set custom codes and how. Take an example what we have to do to extract the message and status code from an error before returning a response from the API:
```go
switch err.(type) {
case errcode.ErrorCode:
daError, _ := err.(errcode.ErrorCode)
statusCode = daError.Descriptor().HTTPStatusCode
errMsg = daError.Message()
case errcode.Error:
// For reference, if you're looking for a particular error
// then you can do something like :
// import ( derr "github.com/docker/docker/errors" )
// if daError.ErrorCode() == derr.ErrorCodeNoSuchContainer { ... }
daError, _ := err.(errcode.Error)
statusCode = daError.ErrorCode().Descriptor().HTTPStatusCode
errMsg = daError.Message
default:
// This part of will be removed once we've
// converted everything over to use the errcode package
// FIXME: this is brittle and should not be necessary.
// If we need to differentiate between different possible error types,
// we should create appropriate error types with clearly defined meaning
errStr := strings.ToLower(err.Error())
for keyword, status := range map[string]int{
"not found": http.StatusNotFound,
"no such": http.StatusNotFound,
"bad parameter": http.StatusBadRequest,
"conflict": http.StatusConflict,
"impossible": http.StatusNotAcceptable,
"wrong login/password": http.StatusUnauthorized,
"hasn't been activated": http.StatusForbidden,
} {
if strings.Contains(errStr, keyword) {
statusCode = status
break
}
}
}
```
You can notice two things in that code:
1. We have to explain how errors work, because our implementation goes against how easy to use Go errors are.
2. At no moment we arrived to remove that `switch` statement that was the original reason to use our custom implementation.
This change removes all our status errors from the errors package and puts them back in their specific contexts.
IT puts the messages back with their contexts. That way, we know right away when errors used and how to generate their messages.
It uses custom interfaces to reason about errors. Errors that need to response with a custom status code MUST implementent this simple interface:
```go
type errorWithStatus interface {
HTTPErrorStatusCode() int
}
```
This interface is very straightforward to implement. It also preserves Go errors real behavior, getting the message is as simple as using the `Error()` method.
I included helper functions to generate errors that use custom status code in `errors/errors.go`.
By doing this, we remove the hard dependency we have eeverywhere to our custom errors package. Yes, you can use it as a helper to generate error, but it's still very easy to generate errors without it.
Please, read this fantastic blog post about errors in Go: http://dave.cheney.net/2014/12/24/inspecting-errors
Signed-off-by: David Calavera <david.calavera@gmail.com>
This is done by moving the following types to api/types/config.go:
- ContainersConfig
- ContainerAttachWithLogsConfig
- ContainerWsAttachWithLogsConfig
- ContainerLogsConfig
- ContainerStatsConfig
Remove dependency on "version" package from types.ContainerStatsConfig.
Decouple the "container" router from the "daemon/exec" implementation.
* This is done by making daemon.ContainerExecInspect() return an interface{}
value. The same trick is already used by daemon.ContainerInspect().
Improve documentation for router packages.
Extract localRoute and router into separate files.
Move local.router to image.imageRouter.
Changes:
- Move local/image.go to image/image_routes.go.
- Move local/local.go to image/image.go
- Rename router to imageRouter.
- Simplify imports for image/image.go (remove alias for router package).
Merge router/local package into router package.
Decouple the "image" router from the actual daemon implementation.
Add Daemon.GetNetworkByID and Daemon.GetNetworkByName.
Decouple the "network" router from the actual daemon implementation.
This is done by replacing the daemon.NetworkByName constant with
an explicit GetNetworkByName method.
Remove the unused Daemon.GetNetwork method and the associated constants NetworkByID and NetworkByName.
Signed-off-by: Lukas Waslowski <cr7pt0gr4ph7@gmail.com>
Signed-off-by: David Calavera <david.calavera@gmail.com>
Currently, daemonbuilder package (part of daemon) implemented the
builder backend. However, it was a very thin wrapper around daemon
methods and caused an implementation dependency for api/server build
endpoint. api/server buildrouter should only know about the backend
implementing the /build API endpoint.
Removing daemonbuilder involved moving build specific methods to
respective files in the daemon, where they fit naturally.
Signed-off-by: Anusha Ragunathan <anusha@docker.com>
Read configuration after flags making this the priority:
1- Apply configuration from file.
2- Apply configuration from flags.
Reload configuration when a signal is received, USR2 in Linux:
- Reload router if the debug configuration changes.
- Reload daemon labels.
- Reload cluster discovery.
Signed-off-by: David Calavera <david.calavera@gmail.com>
- Use the ones provided by docker/go-connections, they are a drop in replacement.
- Remove pkg/sockets from docker.
- Keep pkg/tlsconfig because libnetwork still needs it and there is a
circular dependency issue.
Signed-off-by: David Calavera <david.calavera@gmail.com>
Each plug-in operates as a separate service, and registers with Docker
through general (plug-ins API)
[https://blog.docker.com/2015/06/extending-docker-with-plugins/]. No
Docker daemon recompilation is required in order to add / remove an
authentication plug-in. Each plug-in is notified twice for each
operation: 1) before the operation is performed and, 2) before the
response is returned to the client. The plug-ins can modify the response
that is returned to the client.
The authorization depends on the authorization effort that takes place
in parallel [https://github.com/docker/docker/issues/13697].
This is the official issue of the authorization effort:
https://github.com/docker/docker/issues/14674
(Here)[https://github.com/rhatdan/docker-rbac] you can find an open
document that discusses a default RBAC plug-in for Docker.
Signed-off-by: Liron Levin <liron@twistlock.com>
Added container create flow test and extended the verification for ps
This will prevent the api from trying to serve network requests in
systems where libnetwork is not enabled, returning 404 responses in any
case.
Signed-off-by: David Calavera <david.calavera@gmail.com>
We should not check if the mux framework internals work as expected in every handler.
The missing parameter error doesn't make sense from the user point of view.
This change initializes a proper vars context if the mux fails to do so and delegates
specific parameter error checks to the handlers.
Signed-off-by: David Calavera <david.calavera@gmail.com>
Now we're start to serve early, but all Accept calls are intercepted by
listenbuffer or systemd socket.
Signed-off-by: Alexander Morozov <lk4d4@docker.com>
* Moving Network Remote APIs out of experimental
* --net can now accept user created networks using network drivers/plugins
* Removed the experimental services concept and --default-network option
* Neccessary backend changes to accomodate multiple networks per container
* Integration Tests
Signed-off-by: David Calavera <david.calavera@gmail.com>
Signed-off-by: Madhu Venugopal <madhu@docker.com>
W/o this PR the logs would show:
```
ERRO[0000] API listen on [::]:2375
ERRO[0000] API listen on /var/run/docker.sock
```
which is misleading since these aren't "errors" they're just informational.
Signed-off-by: Doug Davis <dug@us.ibm.com>
It prevents occupying of those resources (ports, unix-sockets) by
containers.
Also fixed false-positive test for that case.
Fix#15912
Signed-off-by: Alexander Morozov <lk4d4@docker.com>
Implement basic interfaces to write custom routers that can be plugged
to the server. Remove server coupling with the daemon.
Signed-off-by: David Calavera <david.calavera@gmail.com>
Although having a request ID available throughout the codebase is very
valuable, the impact of requiring a Context as an argument to every
function in the codepath of an API request, is too significant and was
not properly understood at the time of the review.
Furthermore, mixing API-layer code with non-API-layer code makes the
latter usable only by API-layer code (one that has a notion of Context).
This reverts commit de41640435, reversing
changes made to 7daeecd42d.
Signed-off-by: Tibor Vass <tibor@docker.com>
Conflicts:
api/server/container.go
builder/internals.go
daemon/container_unix.go
daemon/create.go
This reverts commit ff92f45be4, reversing
changes made to 80e31df3b6.
Reverting to make the next revert easier.
Signed-off-by: Tibor Vass <tibor@docker.com>
Avoid creating a global context object that will be used while the daemon is running.
Not only this object won't ever be garbage collected, but it won't ever be used for anything else than creating other contexts in each request. I think it's a bad practive to have something like this sprawling aroud the code.
This change removes that global object and initializes a context in the cases we don't have already one, like shutting down the server.
This also removes a bunch of context arguments from functions that did nothing with it.
Signed-off-by: David Calavera <david.calavera@gmail.com>
This PR adds a "request ID" to each event generated, the 'docker events'
stream now looks like this:
```
2015-09-10T15:02:50.000000000-07:00 [reqid: c01e3534ddca] de7c5d4ca927253cf4e978ee9c4545161e406e9b5a14617efb52c658b249174a: (from ubuntu) create
```
Note the `[reqID: c01e3534ddca]` part, that's new.
Each HTTP request will generate its own unique ID. So, if you do a
`docker build` you'll see a series of events all with the same reqID.
This allow for log processing tools to determine which events are all related
to the same http request.
I didn't propigate the context to all possible funcs in the daemon,
I decided to just do the ones that needed it in order to get the reqID
into the events. I'd like to have people review this direction first, and
if we're ok with it then I'll make sure we're consistent about when
we pass around the context - IOW, make sure that all funcs at the same level
have a context passed in even if they don't call the log funcs - this will
ensure we're consistent w/o passing it around for all calls unnecessarily.
ping @icecrime @calavera @crosbymichael
Signed-off-by: Doug Davis <dug@us.ibm.com>
