238 lines
7.2 KiB
Go
238 lines
7.2 KiB
Go
/*
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Copyright 2014 The go-marathon Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package marathon
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import (
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"fmt"
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"time"
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)
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// Group is a marathon application group
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type Group struct {
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ID string `json:"id"`
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Apps []*Application `json:"apps"`
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Dependencies []string `json:"dependencies"`
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Groups []*Group `json:"groups"`
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}
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// Groups is a collection of marathon application groups
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type Groups struct {
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ID string `json:"id"`
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Apps []*Application `json:"apps"`
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Dependencies []string `json:"dependencies"`
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Groups []*Group `json:"groups"`
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}
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// GetGroupOpts contains a payload for Group and Groups method
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// embed: Embeds nested resources that match the supplied path.
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// You can specify this parameter multiple times with different values
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type GetGroupOpts struct {
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Embed []string `url:"embed,omitempty"`
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}
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// DeleteGroupOpts contains a payload for DeleteGroup method
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// force: overrides a currently running deployment.
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type DeleteGroupOpts struct {
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Force bool `url:"force,omitempty"`
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}
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// UpdateGroupOpts contains a payload for UpdateGroup method
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// force: overrides a currently running deployment.
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type UpdateGroupOpts struct {
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Force bool `url:"force,omitempty"`
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}
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// NewApplicationGroup create a new application group
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// name: the name of the group
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func NewApplicationGroup(name string) *Group {
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return &Group{
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ID: name,
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Apps: make([]*Application, 0),
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Dependencies: make([]string, 0),
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Groups: make([]*Group, 0),
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}
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}
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// Name sets the name of the group
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// name: the name of the group
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func (r *Group) Name(name string) *Group {
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r.ID = validateID(name)
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return r
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}
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// App add a application to the group in question
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// application: a pointer to the Application
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func (r *Group) App(application *Application) *Group {
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if r.Apps == nil {
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r.Apps = make([]*Application, 0)
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}
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r.Apps = append(r.Apps, application)
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return r
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}
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// Groups retrieves a list of all the groups from marathon
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func (r *marathonClient) Groups() (*Groups, error) {
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groups := new(Groups)
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if err := r.apiGet(marathonAPIGroups, "", groups); err != nil {
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return nil, err
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}
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return groups, nil
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}
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// Group retrieves the configuration of a specific group from marathon
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// name: the identifier for the group
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func (r *marathonClient) Group(name string) (*Group, error) {
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group := new(Group)
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if err := r.apiGet(fmt.Sprintf("%s/%s", marathonAPIGroups, trimRootPath(name)), nil, group); err != nil {
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return nil, err
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}
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return group, nil
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}
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// GroupsBy retrieves a list of all the groups from marathon by embed options
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// opts: GetGroupOpts request payload
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func (r *marathonClient) GroupsBy(opts *GetGroupOpts) (*Groups, error) {
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path, err := addOptions(marathonAPIGroups, opts)
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if err != nil {
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return nil, err
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}
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groups := new(Groups)
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if err := r.apiGet(path, "", groups); err != nil {
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return nil, err
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}
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return groups, nil
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}
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// GroupBy retrieves the configuration of a specific group from marathon
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// name: the identifier for the group
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// opts: GetGroupOpts request payload
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func (r *marathonClient) GroupBy(name string, opts *GetGroupOpts) (*Group, error) {
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path, err := addOptions(fmt.Sprintf("%s/%s", marathonAPIGroups, trimRootPath(name)), opts)
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if err != nil {
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return nil, err
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}
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group := new(Group)
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if err := r.apiGet(path, nil, group); err != nil {
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return nil, err
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}
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return group, nil
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}
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// HasGroup checks if the group exists in marathon
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// name: the identifier for the group
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func (r *marathonClient) HasGroup(name string) (bool, error) {
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path := fmt.Sprintf("%s/%s", marathonAPIGroups, trimRootPath(name))
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err := r.apiGet(path, "", nil)
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if err != nil {
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if apiErr, ok := err.(*APIError); ok && apiErr.ErrCode == ErrCodeNotFound {
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return false, nil
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}
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return false, err
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}
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return true, nil
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}
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// CreateGroup creates a new group in marathon
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// group: a pointer the Group structure defining the group
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func (r *marathonClient) CreateGroup(group *Group) error {
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return r.apiPost(marathonAPIGroups, group, nil)
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}
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// WaitOnGroup waits for all the applications in a group to be deployed
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// group: the identifier for the group
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// timeout: a duration of time to wait before considering it failed (all tasks in all apps running defined as deployed)
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func (r *marathonClient) WaitOnGroup(name string, timeout time.Duration) error {
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err := deadline(timeout, func(stop_channel chan bool) error {
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var flick atomicSwitch
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go func() {
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<-stop_channel
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close(stop_channel)
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flick.SwitchOn()
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}()
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for !flick.IsSwitched() {
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if group, err := r.Group(name); err != nil {
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continue
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} else {
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allRunning := true
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// for each of the application, check if the tasks and running
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for _, appID := range group.Apps {
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// Arrrgghhh!! .. so we can't use application instances from the Application struct like with app wait on as it
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// appears the instance count is not set straight away!! .. it defaults to zero and changes probably at the
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// dependencies gets deployed. Which is probably how it internally handles dependencies ..
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// step: grab the application
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application, err := r.Application(appID.ID)
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if err != nil {
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allRunning = false
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break
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}
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if application.Tasks == nil {
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allRunning = false
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} else if len(application.Tasks) != *appID.Instances {
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allRunning = false
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} else if application.TasksRunning != *appID.Instances {
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allRunning = false
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} else if len(application.DeploymentIDs()) > 0 {
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allRunning = false
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}
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}
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// has anyone toggle the flag?
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if allRunning {
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return nil
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}
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}
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time.Sleep(r.config.PollingWaitTime)
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}
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return nil
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})
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return err
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}
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// DeleteGroup deletes a group from marathon
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// name: the identifier for the group
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// force: used to force the delete operation in case of blocked deployment
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func (r *marathonClient) DeleteGroup(name string, force bool) (*DeploymentID, error) {
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version := new(DeploymentID)
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path := fmt.Sprintf("%s/%s", marathonAPIGroups, trimRootPath(name))
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if force {
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path += "?force=true"
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}
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if err := r.apiDelete(path, nil, version); err != nil {
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return nil, err
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}
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return version, nil
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}
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// UpdateGroup updates the parameters of a groups
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// name: the identifier for the group
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// group: the group structure with the new params
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// force: used to force the update operation in case of blocked deployment
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func (r *marathonClient) UpdateGroup(name string, group *Group, force bool) (*DeploymentID, error) {
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deploymentID := new(DeploymentID)
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path := fmt.Sprintf("%s/%s", marathonAPIGroups, trimRootPath(name))
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if force {
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path += "?force=true"
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}
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if err := r.apiPut(path, group, deploymentID); err != nil {
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return nil, err
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}
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return deploymentID, nil
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}
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