Monitoring systems and load balancers are usually configured to use HEAD
requests for health monitoring. The /_ping endpoint currently does not
support this type of request, which means that those systems have fallback
to GET requests.
This patch adds support for HEAD requests on the /_ping endpoint.
Although optional, this patch also returns `Content-Type` and `Content-Length`
headers in case of a HEAD request; Refering to RFC 7231, section 4.3.2:
The HEAD method is identical to GET except that the server MUST NOT
send a message body in the response (i.e., the response terminates at
the end of the header section). The server SHOULD send the same
header fields in response to a HEAD request as it would have sent if
the request had been a GET, except that the payload header fields
(Section 3.3) MAY be omitted. This method can be used for obtaining
metadata about the selected representation without transferring the
representation data and is often used for testing hypertext links for
validity, accessibility, and recent modification.
A payload within a HEAD request message has no defined semantics;
sending a payload body on a HEAD request might cause some existing
implementations to reject the request.
The response to a HEAD request is cacheable; a cache MAY use it to
satisfy subsequent HEAD requests unless otherwise indicated by the
Cache-Control header field (Section 5.2 of [RFC7234]). A HEAD
response might also have an effect on previously cached responses to
GET; see Section 4.3.5 of [RFC7234].
With this patch applied, either `GET` or `HEAD` requests work; the only
difference is that the body is empty in case of a `HEAD` request;
curl -i --unix-socket /var/run/docker.sock http://localhost/_ping
HTTP/1.1 200 OK
Api-Version: 1.40
Cache-Control: no-cache, no-store, must-revalidate
Docker-Experimental: false
Ostype: linux
Pragma: no-cache
Server: Docker/dev (linux)
Date: Mon, 14 Jan 2019 12:35:16 GMT
Content-Length: 2
Content-Type: text/plain; charset=utf-8
OK
curl --head -i --unix-socket /var/run/docker.sock http://localhost/_ping
HTTP/1.1 200 OK
Api-Version: 1.40
Cache-Control: no-cache, no-store, must-revalidate
Content-Length: 0
Content-Type: text/plain; charset=utf-8
Docker-Experimental: false
Ostype: linux
Pragma: no-cache
Server: Docker/dev (linux)
Date: Mon, 14 Jan 2019 12:34:15 GMT
The client is also updated to use `HEAD` by default, but fallback to `GET`
if the daemon does not support this method.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
- Add support for exact list of capabilities, support only OCI model
- Support OCI model on CapAdd and CapDrop but remain backward compatibility
- Create variable locally instead of declaring it at the top
- Use const for magic "ALL" value
- Rename `cap` variable as it overlaps with `cap()` built-in
- Normalize and validate capabilities before use
- Move validation for conflicting options to validateHostConfig()
- TweakCapabilities: simplify logic to calculate capabilities
Signed-off-by: Olli Janatuinen <olli.janatuinen@gmail.com>
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
The cancellable handler is no longer needed as the context that is
passed with the http request will be cancelled just like the close
notifier was doing.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
This fix tries to address the issue raised in 37038 where
there were no memory.kernelTCP support for linux.
This fix add MemoryKernelTCP to HostConfig, and pass
the config to runtime-spec.
Additional test case has been added.
This fix fixes 37038.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
This commit contains changes to configure DataPathPort
option. By default we use 4789 port number. But this commit
will allow user to configure port number during swarm init.
DataPathPort can't be modified after swarm init.
Signed-off-by: selansen <elango.siva@docker.com>
These options were added in API 1.39, so should be ignored
when using an older version of the API.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This allows non-recursive bind-mount, i.e. mount(2) with "bind" rather than "rbind".
Swarm-mode will be supported in a separate PR because of mutual vendoring.
Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>
This feature was added in 14da20f5e7,
and was merged after API v1.39 shipped as part of the Docker 18.09
release candidates.
This commit moves the feature to the correct API version.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Adds support for sysctl options in docker services.
* Adds API plumbing for creating services with sysctl options set.
* Adds swagger.yaml documentation for new API field.
* Updates the API version history document.
* Changes executor package to make use of the Sysctls field on objects
* Includes integration test to verify that new behavior works.
Essentially, everything needed to support the equivalent of docker run's
`--sysctl` option except the CLI.
Includes a vendoring of swarmkit for proto changes to support the new
behavior.
Signed-off-by: Drew Erny <drew.erny@docker.com>
This should eliminate a bunch of new (go-1.11 related) validation
errors telling that the code is not formatted with `gofmt -s`.
No functional change, just whitespace (i.e.
`git show --ignore-space-change` shows nothing).
Patch generated with:
> git ls-files | grep -v ^vendor/ | grep .go$ | xargs gofmt -s -w
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
