/
routers_api.go
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/
routers_api.go
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package api
import (
"fmt"
"net/http"
"strings"
mlp "github.com/caraml-dev/mlp/api/client"
"github.com/caraml-dev/turing/api/turing/api/request"
"github.com/caraml-dev/turing/api/turing/models"
"github.com/caraml-dev/turing/api/turing/log"
)
type RoutersController struct {
RouterDeploymentController
}
// ListRouters lists all routers configured in the provided project.
// If none are found, an error will be thrown.
func (c RoutersController) ListRouters(
_ *http.Request,
vars RequestVars, _ interface{},
) *Response {
// Parse input
var errResp *Response
var project *mlp.Project
if project, errResp = c.getProjectFromRequestVars(vars); errResp != nil {
return errResp
}
// List routers
routers, err := c.RoutersService.ListRouters(models.ID(project.ID), "")
if err != nil {
return InternalServerError("unable to list routers", err.Error())
}
return Ok(routers)
}
// GetRouter gets a router matching the provided routerID.
func (c RoutersController) GetRouter(
_ *http.Request,
vars RequestVars, _ interface{},
) *Response {
// Parse input
var errResp *Response
var router *models.Router
if router, errResp = c.getRouterFromRequestVars(vars); errResp != nil {
return errResp
}
// Return router
return Ok(router)
}
// CreateRouter creates a router from the provided configuration. If there already exists
// a router within the provided project with the same name, this method will throw an error.
// If not, a new Router and associated RouterVersion will be created and deployed.
func (c RoutersController) CreateRouter(
_ *http.Request,
vars RequestVars,
body interface{},
) *Response {
// Parse request vars
var errResp *Response
var project *mlp.Project
if project, errResp = c.getProjectFromRequestVars(vars); errResp != nil {
return errResp
}
request := body.(*request.CreateOrUpdateRouterRequest)
// check if router already exists
router, _ := c.RoutersService.FindByProjectAndName(models.ID(project.ID), request.Name)
if router != nil {
return BadRequest("invalid router name",
fmt.Sprintf("router with name %s already exists in project %d", request.Name, project.ID))
}
_, err := c.MLPService.GetEnvironment(request.Environment)
if err != nil {
return BadRequest("invalid environment", fmt.Sprintf("environment %s does not exist", request.Environment))
}
// if not, create
router, err = c.RoutersService.Save(request.BuildRouter(models.ID(project.ID)))
if err != nil {
return InternalServerError("unable to create router", err.Error())
}
// then create the new version
var routerVersion *models.RouterVersion
if request.Config == nil {
return InternalServerError("unable to create router", "router config is empty")
}
rVersion, err := request.Config.BuildRouterVersion(
project.Name,
router,
c.RouterDefaults,
c.AppContext.CryptoService,
c.AppContext.ExperimentsService,
c.EnsemblersService)
if err == nil {
// Save router version
routerVersion, err = c.RouterVersionsService.Save(rVersion)
}
if err != nil {
errorStrings := []string{err.Error()}
// Set router status to failed and return error
router.Status = models.RouterStatusFailed
router, err = c.RoutersService.Save(router)
if err != nil {
errorStrings = append(errorStrings, err.Error())
}
return InternalServerError("unable to create router", strings.Join(errorStrings, ". "))
}
// deploy the new version
go func() {
err := c.deployOrRollbackRouter(project, router, routerVersion)
if err != nil {
log.Errorf("Error deploying router %s:%s:%d: %v",
project.Name, router.Name, routerVersion.Version, err)
}
}()
return Ok(router)
}
// UpdateRouter updates a router from the provided configuration. If no router exists
// within the provided project with the provided id, this method will throw an error.
// If the update is valid, a new RouterVersion will be created and deployed.
func (c RoutersController) UpdateRouter(_ *http.Request, vars RequestVars, body interface{}) *Response {
// Parse request vars
var errResp *Response
var project *mlp.Project
var router *models.Router
if project, errResp = c.getProjectFromRequestVars(vars); errResp != nil {
return errResp
}
if router, errResp = c.getRouterFromRequestVars(vars); errResp != nil {
return errResp
}
request := body.(*request.CreateOrUpdateRouterRequest)
// Check if the router environment and name are unchanged
if request.Environment != router.EnvironmentName || request.Name != router.Name {
return BadRequest("invalid router configuration",
"Router name and environment cannot be changed after creation")
}
// Check if any deployment is in progress, if yes, disallow the update
if router.Status == models.RouterStatusPending {
return BadRequest("invalid update request",
"another version is currently pending deployment")
}
// Create new version
var routerVersion *models.RouterVersion
if request.Config == nil {
return InternalServerError("unable to update router", "router config is empty")
}
rVersion, err := request.Config.BuildRouterVersion(
project.Name,
router,
c.RouterDefaults,
c.AppContext.CryptoService,
c.AppContext.ExperimentsService,
c.EnsemblersService)
if err == nil {
// Save router version, re-assign the value of err
routerVersion, err = c.RouterVersionsService.Save(rVersion)
}
if err != nil {
return InternalServerError("unable to update router", err.Error())
}
// Deploy the new version
go func() {
err := c.deployOrRollbackRouter(project, router, routerVersion)
if err != nil {
log.Errorf("Error deploying router %s:%s:%d: %v",
project.Name, router.Name, routerVersion.Version, err)
}
}()
return Ok(router)
}
// DeleteRouter deletes a router and all its associated versions.
func (c RoutersController) DeleteRouter(
_ *http.Request,
vars RequestVars,
_ interface{},
) *Response {
// Parse request vars
var errResp *Response
var router *models.Router
if router, errResp = c.getRouterFromRequestVars(vars); errResp != nil {
return errResp
}
// Check if there are any pending or deployed versions, if yes, disallow the delete
if router.Status == models.RouterStatusPending ||
router.Status == models.RouterStatusDeployed {
return BadRequest("invalid delete request", "router is currently deployed. Undeploy it first.")
}
pendingRouterVersions, err := c.RouterVersionsService.ListRouterVersionsWithStatus(
router.ID, models.RouterVersionStatusPending)
if err != nil {
return InternalServerError("unable to retrieve router versions", err.Error())
}
if len(pendingRouterVersions) > 0 {
return BadRequest("invalid delete request", "a router version is currently pending deployment")
}
err = c.RoutersService.Delete(router)
if err != nil {
return InternalServerError("unable to delete router", err.Error())
}
return Ok(map[string]int{"id": int(router.ID)})
}
// DeployRouter deploys the current version of the given router into the associated
// kubernetes cluster. If there is no current version, an error is returned.
func (c RoutersController) DeployRouter(
_ *http.Request,
vars RequestVars,
_ interface{},
) *Response {
// Parse request vars
var errResp *Response
var project *mlp.Project
var router *models.Router
if project, errResp = c.getProjectFromRequestVars(vars); errResp != nil {
return errResp
}
if router, errResp = c.getRouterFromRequestVars(vars); errResp != nil {
return errResp
}
// Check if router is already deployed / deploying
switch router.Status {
case models.RouterStatusDeployed:
return BadRequest("invalid deploy request", "router is already deployed")
case models.RouterStatusPending:
return BadRequest("invalid deploy request",
"router is currently deploying, cannot do another deployment")
}
// Get the current router version. If nil, it means there is no version of the
// router to deploy.
if router.CurrRouterVersion == nil {
return BadRequest("invalid deploy request", "router has no current configuration")
}
// Query router version to load all relationships
routerVersion, err := c.RouterVersionsService.FindByID(router.CurrRouterVersion.ID)
if err != nil {
return NotFound("router version not found", err.Error())
}
// Deploy the version asynchronously
go func() {
err := c.deployOrRollbackRouter(project, router, routerVersion)
if err != nil {
log.Errorf("Error deploying router version %s:%s:%d: %v",
project.Name, router.Name, routerVersion.Version, err)
}
}()
return Accepted(map[string]int{
"router_id": int(router.ID),
"version": int(routerVersion.Version),
})
}
// UndeployRouter deletes the given router specs from the associated kubernetes cluster
func (c RoutersController) UndeployRouter(
_ *http.Request,
vars RequestVars,
_ interface{},
) *Response {
// Parse request vars
var errResp *Response
var project *mlp.Project
var router *models.Router
if project, errResp = c.getProjectFromRequestVars(vars); errResp != nil {
return errResp
}
if router, errResp = c.getRouterFromRequestVars(vars); errResp != nil {
return errResp
}
// Delete the deployment
err := c.undeployRouter(project, router)
if err != nil {
return InternalServerError("unable to undeploy router", err.Error())
}
return Ok(map[string]int{"router_id": int(router.ID)})
}
func (c RoutersController) ListRouterEvents(_ *http.Request,
vars RequestVars,
_ interface{},
) *Response {
// Parse request vars
var errResp *Response
var router *models.Router
if router, errResp = c.getRouterFromRequestVars(vars); errResp != nil {
return errResp
}
// Get events
events, err := c.EventService.ListEvents(int(router.ID))
if err != nil {
return NotFound("events not found", err.Error())
}
return Ok(map[string][]*models.Event{"events": events})
}
func (c RoutersController) Routes() []Route {
return []Route{
{
method: http.MethodGet,
path: "/projects/{project_id}/routers",
handler: c.ListRouters,
},
{
method: http.MethodGet,
path: "/projects/{project_id}/routers/{router_id}",
handler: c.GetRouter,
},
{
method: http.MethodPost,
path: "/projects/{project_id}/routers",
body: request.CreateOrUpdateRouterRequest{},
handler: c.CreateRouter,
},
{
method: http.MethodPut,
path: "/projects/{project_id}/routers/{router_id}",
body: request.CreateOrUpdateRouterRequest{},
handler: c.UpdateRouter,
},
{
method: http.MethodDelete,
path: "/projects/{project_id}/routers/{router_id}",
handler: c.DeleteRouter,
},
// Deploy / Undeploy router version
{
method: http.MethodPost,
path: "/projects/{project_id}/routers/{router_id}/deploy",
handler: c.DeployRouter,
},
{
method: http.MethodPost,
path: "/projects/{project_id}/routers/{router_id}/undeploy",
handler: c.UndeployRouter,
},
// Router Events
{
method: http.MethodGet,
path: "/projects/{project_id}/routers/{router_id}/events",
handler: c.ListRouterEvents,
},
}
}