feature: support validate volume create config

[allencloud]

Signed-off-by: Allen Sun allensun.shl@alibaba-inc.com

1.Describe what this PR did

This PR restricts the validate type Post request config body.

• I add VolumeCreateConfig field restriction in swagger.yml;
• generate structs in apis/types, in this struct file, there are validation funcs which takes restriction into consideration:

for example the name in VolumeCreateConfig validation:

func (m *VolumeCreateConfig) validateName(formats strfmt.Registry) error {

	if swag.IsZero(m.Name) { // not required
		return nil
	}

	if err := validate.MinLength("Name", "body", string(m.Name), 1); err != nil {
		return err
	}

	if err := validate.MaxLength("Name", "body", string(m.Name), 64); err != nil {
		return err
	}

	if err := validate.Pattern("Name", "body", string(m.Name), `[a-zA-Z0-9][a-zA-Z0-9-_.]{0,63}`); err != nil {
		return err
	}

	return nil
}

When the above two aspects has been done, codes in https://github.com/alibaba/pouch/blob/master/apis/server/volume_bridge.go#L23 will work.

	config := &types.VolumeCreateConfig{}
	// decode request body
	if err := json.NewDecoder(req.Body).Decode(config); err != nil {
		return httputils.NewHTTPError(err, http.StatusBadRequest)
	}
	// validate request body
	if err := config.Validate(strfmt.NewFormats()); err != nil {
		return httputils.NewHTTPError(err, http.StatusBadRequest)
	}

2.Does this pull request fix one issue?
none, this is related to issue #443.

3.Describe how you did it
NONE

4.Describe how to verify it
We need to add test cases according to this PR in API POST /volumes/create test.
/cc @Letty5411

5.Special notes for reviews
NONE

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[allencloud]

I do not think this is correct. Since in some environment, there are labels like "removeMounts": "/etc/entrypoint.sh" and "ContainerHnFormat": "aserver{{IpPad .ContainerIp}}.center.et2" . So we need to add /, {} and some others.

[rudyfly]

yes, / is necessary, need to add it.

[allencloud]

Moving it to milestone 0.3.

[pouchrobot]

ping @allencloud

CI fails according integration system.
Please refer to the CI failure Details button to corresponding test, and update your PR to pass CI.

If this is flaky test, welcome to track this with profiling an issue.

build url: https://travis-ci.org/alibaba/pouch/builds/359753465
build duration: 158s

[pouchrobot]

ping @allencloud
We found that this PR is 737 commits, which is more than 10 commits, behind master.
Please rebase the branch against master and push it back again. Thanks a lot.