Adding Support for LBaaS v2 - Health Monitors

openstack/networking/v2/extensions/lbaas_v2/monitors/requests.go

@@ -0,0 +1,274 @@
+package monitors
+
+import (
+	"fmt"
+
+	"github.com/rackspace/gophercloud"
+	"github.com/rackspace/gophercloud/pagination"
+)
+
+// ListOpts allows the filtering and sorting of paginated collections through
+// the API. Filtering is achieved by passing in struct field values that map to
+// the Monitor attributes you want to see returned. SortKey allows you to
+// sort by a particular Monitor attribute. SortDir sets the direction, and is
+// either `asc' or `desc'. Marker and Limit are used for pagination.
+type ListOpts struct {
+	ID            string `q:"id"`
+	TenantID      string `q:"tenant_id"`
+	Type          string `q:"type"`
+	Delay         int    `q:"delay"`
+	Timeout       int    `q:"timeout"`
+	MaxRetries    int    `q:"max_retries"`
+	HTTPMethod    string `q:"http_method"`
+	URLPath       string `q:"url_path"`
+	ExpectedCodes string `q:"expected_codes"`
+	AdminStateUp  *bool  `q:"admin_state_up"`
+	Status        string `q:"status"`
+	Limit         int    `q:"limit"`
+	Marker        string `q:"marker"`
+	SortKey       string `q:"sort_key"`
+	SortDir       string `q:"sort_dir"`
+}
+
+// List returns a Pager which allows you to iterate over a collection of
+// routers. It accepts a ListOpts struct, which allows you to filter and sort
+// the returned collection for greater efficiency.
+//
+// Default policy settings return only those routers that are owned by the
+// tenant who submits the request, unless an admin user submits the request.
+func List(c *gophercloud.ServiceClient, opts ListOpts) pagination.Pager {
+	q, err := gophercloud.BuildQueryString(&opts)
+	if err != nil {
+		return pagination.Pager{Err: err}
+	}
+	u := rootURL(c) + q.String()
+
+	return pagination.NewPager(c, u, func(r pagination.PageResult) pagination.Page {
+		return MonitorPage{pagination.LinkedPageBase{PageResult: r}}
+	})
+}
+
+// Constants that represent approved monitoring types.
+const (
+	TypePING  = "PING"
+	TypeTCP   = "TCP"
+	TypeHTTP  = "HTTP"
+	TypeHTTPS = "HTTPS"
+)
+
+var (
+	errPoolIDRequired        = fmt.Errorf("Pool ID to monitor is required")
+	errValidTypeRequired     = fmt.Errorf("A valid Type is required. Supported values are PING, TCP, HTTP and HTTPS")
+	errDelayRequired         = fmt.Errorf("Delay is required")
+	errTimeoutRequired       = fmt.Errorf("Timeout is required")
+	errMaxRetriesRequired    = fmt.Errorf("MaxRetries is required")
+	errURLPathRequired       = fmt.Errorf("URL path is required")
+	errExpectedCodesRequired = fmt.Errorf("ExpectedCodes is required")
+	errDelayMustGETimeout    = fmt.Errorf("Delay must be greater than or equal to timeout")
+)
+
+// CreateOpts contains all the values needed to create a new Health Monitor.
+type CreateOpts struct {
+	// The Pool to Monitor.
+	PoolID string
+
+	// Required for admins. Indicates the owner of the Loadbalancer.
+	TenantID string
+
+	// Required. The type of probe, which is PING, TCP, HTTP, or HTTPS, that is
+	// sent by the load balancer to verify the member state.
+	Type string
+
+	// Required. The time, in seconds, between sending probes to members.
+	Delay int
+
+	// Required. Maximum number of seconds for a Monitor to wait for a ping reply
+	// before it times out. The value must be less than the delay value.
+	Timeout int
+
+	// Required. Number of permissible ping failures before changing the member's
+	// status to INACTIVE. Must be a number between 1 and 10.
+	MaxRetries int
+
+	// Required for HTTP(S) types. URI path that will be accessed if Monitor type
+	// is HTTP or HTTPS.
+	URLPath string
+
+	// Required for HTTP(S) types. The HTTP method used for requests by the
+	// Monitor. If this attribute is not specified, it defaults to "GET".
+	HTTPMethod string
+
+	// Required for HTTP(S) types. Expected HTTP codes for a passing HTTP(S)
+	// Monitor. You can either specify a single status like "200", or a range
+	// like "200-202".
+	ExpectedCodes string
+
+	AdminStateUp *bool
+}
+
+// Create is an operation which provisions a new Health Monitor. There are
+// different types of Monitor you can provision: PING, TCP or HTTP(S). Below
+// are examples of how to create each one.
+//
+// Here is an example config struct to use when creating a PING or TCP Monitor:
+//
+// CreateOpts{Type: TypePING, Delay: 20, Timeout: 10, MaxRetries: 3}
+// CreateOpts{Type: TypeTCP, Delay: 20, Timeout: 10, MaxRetries: 3}
+//
+// Here is an example config struct to use when creating a HTTP(S) Monitor:
+//
+// CreateOpts{Type: TypeHTTP, Delay: 20, Timeout: 10, MaxRetries: 3,
+//  HttpMethod: "HEAD", ExpectedCodes: "200". PoolID: "2c946bfc-1804-43ab-a2ff-58f6a762b505"}
+//
+func Create(c *gophercloud.ServiceClient, opts CreateOpts) CreateResult {
+	var res CreateResult
+
+	// Validate inputs
+	allowed := map[string]bool{TypeHTTP: true, TypeHTTPS: true, TypeTCP: true, TypePING: true}
+	if opts.Type == "" || allowed[opts.Type] == false {
+		res.Err = errValidTypeRequired
+	}
+	if opts.PoolID == "" {
+		res.Err = errPoolIDRequired
+	}
+	if opts.Delay == 0 {
+		res.Err = errDelayRequired
+	}
+	if opts.Timeout == 0 {
+		res.Err = errTimeoutRequired
+	}
+	if opts.MaxRetries == 0 {
+		res.Err = errMaxRetriesRequired
+	}
+	if opts.Type == TypeHTTP || opts.Type == TypeHTTPS {
+		if opts.URLPath == "" {
+			res.Err = errURLPathRequired
+		}
+		if opts.ExpectedCodes == "" {
+			res.Err = errExpectedCodesRequired
+		}
+	}
+	if opts.Delay < opts.Timeout {
+		res.Err = errDelayMustGETimeout
+	}
+	if res.Err != nil {
+		return res
+	}
+
+	type monitor struct {
+		Type          string  `json:"type"`
+		PoolID        string  `json:"pool_id"`
+		Delay         int     `json:"delay"`
+		Timeout       int     `json:"timeout"`
+		MaxRetries    int     `json:"max_retries"`
+		TenantID      *string `json:"tenant_id,omitempty"`
+		URLPath       *string `json:"url_path,omitempty"`
+		ExpectedCodes *string `json:"expected_codes,omitempty"`
+		HTTPMethod    *string `json:"http_method,omitempty"`
+		AdminStateUp  *bool   `json:"admin_state_up,omitempty"`
+	}
+
+	type request struct {
+		Monitor monitor `json:"health_monitor"`
+	}
+
+	reqBody := request{Monitor: monitor{
+		Type:          opts.Type,
+		PoolID:        opts.PoolID,
+		Delay:         opts.Delay,
+		Timeout:       opts.Timeout,
+		MaxRetries:    opts.MaxRetries,
+		TenantID:      gophercloud.MaybeString(opts.TenantID),
+		URLPath:       gophercloud.MaybeString(opts.URLPath),
+		ExpectedCodes: gophercloud.MaybeString(opts.ExpectedCodes),
+		HTTPMethod:    gophercloud.MaybeString(opts.HTTPMethod),
+		AdminStateUp:  opts.AdminStateUp,
+	}}
+
+	_, res.Err = c.Post(rootURL(c), reqBody, &res.Body, nil)
+	return res
+}
+
+// Get retrieves a particular Health Monitor based on its unique ID.
+func Get(c *gophercloud.ServiceClient, id string) GetResult {
+	var res GetResult
+	_, res.Err = c.Get(resourceURL(c, id), &res.Body, nil)
+	return res
+}
+
+// UpdateOpts contains all the values needed to update an existing Monitor.
+// Attributes not listed here but appear in CreateOpts are immutable and cannot
+// be updated.
+type UpdateOpts struct {
+	// Required. The time, in seconds, between sending probes to members.
+	Delay int
+
+	// Required. Maximum number of seconds for a Monitor to wait for a ping reply
+	// before it times out. The value must be less than the delay value.
+	Timeout int
+
+	// Required. Number of permissible ping failures before changing the member's
+	// status to INACTIVE. Must be a number between 1 and 10.
+	MaxRetries int
+
+	// Required for HTTP(S) types. URI path that will be accessed if Monitor type
+	// is HTTP or HTTPS.
+	URLPath string
+
+	// Required for HTTP(S) types. The HTTP method used for requests by the
+	// Monitor. If this attribute is not specified, it defaults to "GET".
+	HTTPMethod string
+
+	// Required for HTTP(S) types. Expected HTTP codes for a passing HTTP(S)
+	// Monitor. You can either specify a single status like "200", or a range
+	// like "200-202".
+	ExpectedCodes string
+
+	AdminStateUp *bool
+}
+
+// Update is an operation which modifies the attributes of the specified Monitor.
+func Update(c *gophercloud.ServiceClient, id string, opts UpdateOpts) UpdateResult {
+	var res UpdateResult
+
+	if opts.Delay > 0 && opts.Timeout > 0 && opts.Delay < opts.Timeout {
+		res.Err = errDelayMustGETimeout
+	}
+
+	type monitor struct {
+		Delay         int     `json:"delay"`
+		Timeout       int     `json:"timeout"`
+		MaxRetries    int     `json:"max_retries"`
+		URLPath       *string `json:"url_path,omitempty"`
+		ExpectedCodes *string `json:"expected_codes,omitempty"`
+		HTTPMethod    *string `json:"http_method,omitempty"`
+		AdminStateUp  *bool   `json:"admin_state_up,omitempty"`
+	}
+
+	type request struct {
+		Monitor monitor `json:"health_monitor"`
+	}
+
+	reqBody := request{Monitor: monitor{
+		Delay:         opts.Delay,
+		Timeout:       opts.Timeout,
+		MaxRetries:    opts.MaxRetries,
+		URLPath:       gophercloud.MaybeString(opts.URLPath),
+		ExpectedCodes: gophercloud.MaybeString(opts.ExpectedCodes),
+		HTTPMethod:    gophercloud.MaybeString(opts.HTTPMethod),
+		AdminStateUp:  opts.AdminStateUp,
+	}}
+
+	_, res.Err = c.Put(resourceURL(c, id), reqBody, &res.Body, &gophercloud.RequestOpts{
+		OkCodes: []int{200, 202},
+	})
+
+	return res
+}
+
+// Delete will permanently delete a particular Monitor based on its unique ID.
+func Delete(c *gophercloud.ServiceClient, id string) DeleteResult {
+	var res DeleteResult
+	_, res.Err = c.Delete(resourceURL(c, id), nil)
+	return res
+}