mirror of
https://github.com/prometheus/prometheus.git
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329 lines
12 KiB
Go
329 lines
12 KiB
Go
package godo
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import (
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"context"
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"fmt"
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"net/http"
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)
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const loadBalancersBasePath = "/v2/load_balancers"
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const forwardingRulesPath = "forwarding_rules"
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const dropletsPath = "droplets"
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// LoadBalancersService is an interface for managing load balancers with the DigitalOcean API.
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// See: https://developers.digitalocean.com/documentation/v2#load-balancers
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type LoadBalancersService interface {
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Get(context.Context, string) (*LoadBalancer, *Response, error)
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List(context.Context, *ListOptions) ([]LoadBalancer, *Response, error)
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Create(context.Context, *LoadBalancerRequest) (*LoadBalancer, *Response, error)
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Update(ctx context.Context, lbID string, lbr *LoadBalancerRequest) (*LoadBalancer, *Response, error)
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Delete(ctx context.Context, lbID string) (*Response, error)
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AddDroplets(ctx context.Context, lbID string, dropletIDs ...int) (*Response, error)
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RemoveDroplets(ctx context.Context, lbID string, dropletIDs ...int) (*Response, error)
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AddForwardingRules(ctx context.Context, lbID string, rules ...ForwardingRule) (*Response, error)
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RemoveForwardingRules(ctx context.Context, lbID string, rules ...ForwardingRule) (*Response, error)
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}
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// LoadBalancer represents a DigitalOcean load balancer configuration.
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// Tags can only be provided upon the creation of a Load Balancer.
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type LoadBalancer struct {
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ID string `json:"id,omitempty"`
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Name string `json:"name,omitempty"`
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IP string `json:"ip,omitempty"`
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SizeSlug string `json:"size,omitempty"`
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Algorithm string `json:"algorithm,omitempty"`
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Status string `json:"status,omitempty"`
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Created string `json:"created_at,omitempty"`
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ForwardingRules []ForwardingRule `json:"forwarding_rules,omitempty"`
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HealthCheck *HealthCheck `json:"health_check,omitempty"`
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StickySessions *StickySessions `json:"sticky_sessions,omitempty"`
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Region *Region `json:"region,omitempty"`
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DropletIDs []int `json:"droplet_ids,omitempty"`
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Tag string `json:"tag,omitempty"`
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Tags []string `json:"tags,omitempty"`
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RedirectHttpToHttps bool `json:"redirect_http_to_https,omitempty"`
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EnableProxyProtocol bool `json:"enable_proxy_protocol,omitempty"`
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EnableBackendKeepalive bool `json:"enable_backend_keepalive,omitempty"`
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VPCUUID string `json:"vpc_uuid,omitempty"`
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}
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// String creates a human-readable description of a LoadBalancer.
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func (l LoadBalancer) String() string {
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return Stringify(l)
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}
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// URN returns the load balancer ID in a valid DO API URN form.
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func (l LoadBalancer) URN() string {
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return ToURN("LoadBalancer", l.ID)
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}
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// AsRequest creates a LoadBalancerRequest that can be submitted to Update with the current values of the LoadBalancer.
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// Modifying the returned LoadBalancerRequest will not modify the original LoadBalancer.
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func (l LoadBalancer) AsRequest() *LoadBalancerRequest {
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r := LoadBalancerRequest{
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Name: l.Name,
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Algorithm: l.Algorithm,
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SizeSlug: l.SizeSlug,
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ForwardingRules: append([]ForwardingRule(nil), l.ForwardingRules...),
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DropletIDs: append([]int(nil), l.DropletIDs...),
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Tag: l.Tag,
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RedirectHttpToHttps: l.RedirectHttpToHttps,
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EnableProxyProtocol: l.EnableProxyProtocol,
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EnableBackendKeepalive: l.EnableBackendKeepalive,
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HealthCheck: l.HealthCheck,
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VPCUUID: l.VPCUUID,
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}
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if l.HealthCheck != nil {
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r.HealthCheck = &HealthCheck{}
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*r.HealthCheck = *l.HealthCheck
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}
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if l.StickySessions != nil {
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r.StickySessions = &StickySessions{}
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*r.StickySessions = *l.StickySessions
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}
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if l.Region != nil {
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r.Region = l.Region.Slug
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}
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return &r
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}
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// ForwardingRule represents load balancer forwarding rules.
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type ForwardingRule struct {
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EntryProtocol string `json:"entry_protocol,omitempty"`
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EntryPort int `json:"entry_port,omitempty"`
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TargetProtocol string `json:"target_protocol,omitempty"`
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TargetPort int `json:"target_port,omitempty"`
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CertificateID string `json:"certificate_id,omitempty"`
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TlsPassthrough bool `json:"tls_passthrough,omitempty"`
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}
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// String creates a human-readable description of a ForwardingRule.
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func (f ForwardingRule) String() string {
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return Stringify(f)
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}
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// HealthCheck represents optional load balancer health check rules.
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type HealthCheck struct {
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Protocol string `json:"protocol,omitempty"`
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Port int `json:"port,omitempty"`
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Path string `json:"path,omitempty"`
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CheckIntervalSeconds int `json:"check_interval_seconds,omitempty"`
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ResponseTimeoutSeconds int `json:"response_timeout_seconds,omitempty"`
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HealthyThreshold int `json:"healthy_threshold,omitempty"`
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UnhealthyThreshold int `json:"unhealthy_threshold,omitempty"`
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}
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// String creates a human-readable description of a HealthCheck.
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func (h HealthCheck) String() string {
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return Stringify(h)
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}
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// StickySessions represents optional load balancer session affinity rules.
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type StickySessions struct {
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Type string `json:"type,omitempty"`
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CookieName string `json:"cookie_name,omitempty"`
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CookieTtlSeconds int `json:"cookie_ttl_seconds,omitempty"`
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}
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// String creates a human-readable description of a StickySessions instance.
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func (s StickySessions) String() string {
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return Stringify(s)
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}
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// LoadBalancerRequest represents the configuration to be applied to an existing or a new load balancer.
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type LoadBalancerRequest struct {
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Name string `json:"name,omitempty"`
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Algorithm string `json:"algorithm,omitempty"`
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Region string `json:"region,omitempty"`
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SizeSlug string `json:"size,omitempty"`
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ForwardingRules []ForwardingRule `json:"forwarding_rules,omitempty"`
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HealthCheck *HealthCheck `json:"health_check,omitempty"`
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StickySessions *StickySessions `json:"sticky_sessions,omitempty"`
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DropletIDs []int `json:"droplet_ids,omitempty"`
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Tag string `json:"tag,omitempty"`
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Tags []string `json:"tags,omitempty"`
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RedirectHttpToHttps bool `json:"redirect_http_to_https,omitempty"`
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EnableProxyProtocol bool `json:"enable_proxy_protocol,omitempty"`
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EnableBackendKeepalive bool `json:"enable_backend_keepalive,omitempty"`
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VPCUUID string `json:"vpc_uuid,omitempty"`
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}
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// String creates a human-readable description of a LoadBalancerRequest.
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func (l LoadBalancerRequest) String() string {
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return Stringify(l)
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}
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type forwardingRulesRequest struct {
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Rules []ForwardingRule `json:"forwarding_rules,omitempty"`
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}
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func (l forwardingRulesRequest) String() string {
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return Stringify(l)
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}
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type dropletIDsRequest struct {
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IDs []int `json:"droplet_ids,omitempty"`
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}
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func (l dropletIDsRequest) String() string {
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return Stringify(l)
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}
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type loadBalancersRoot struct {
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LoadBalancers []LoadBalancer `json:"load_balancers"`
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Links *Links `json:"links"`
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Meta *Meta `json:"meta"`
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}
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type loadBalancerRoot struct {
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LoadBalancer *LoadBalancer `json:"load_balancer"`
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}
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// LoadBalancersServiceOp handles communication with load balancer-related methods of the DigitalOcean API.
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type LoadBalancersServiceOp struct {
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client *Client
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}
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var _ LoadBalancersService = &LoadBalancersServiceOp{}
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// Get an existing load balancer by its identifier.
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func (l *LoadBalancersServiceOp) Get(ctx context.Context, lbID string) (*LoadBalancer, *Response, error) {
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path := fmt.Sprintf("%s/%s", loadBalancersBasePath, lbID)
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req, err := l.client.NewRequest(ctx, http.MethodGet, path, nil)
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if err != nil {
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return nil, nil, err
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}
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root := new(loadBalancerRoot)
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resp, err := l.client.Do(ctx, req, root)
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if err != nil {
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return nil, resp, err
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}
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return root.LoadBalancer, resp, err
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}
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// List load balancers, with optional pagination.
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func (l *LoadBalancersServiceOp) List(ctx context.Context, opt *ListOptions) ([]LoadBalancer, *Response, error) {
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path, err := addOptions(loadBalancersBasePath, opt)
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if err != nil {
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return nil, nil, err
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}
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req, err := l.client.NewRequest(ctx, http.MethodGet, path, nil)
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if err != nil {
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return nil, nil, err
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}
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root := new(loadBalancersRoot)
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resp, err := l.client.Do(ctx, req, root)
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if err != nil {
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return nil, resp, err
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}
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if l := root.Links; l != nil {
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resp.Links = l
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}
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if m := root.Meta; m != nil {
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resp.Meta = m
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}
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return root.LoadBalancers, resp, err
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}
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// Create a new load balancer with a given configuration.
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func (l *LoadBalancersServiceOp) Create(ctx context.Context, lbr *LoadBalancerRequest) (*LoadBalancer, *Response, error) {
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req, err := l.client.NewRequest(ctx, http.MethodPost, loadBalancersBasePath, lbr)
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if err != nil {
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return nil, nil, err
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}
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root := new(loadBalancerRoot)
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resp, err := l.client.Do(ctx, req, root)
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if err != nil {
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return nil, resp, err
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}
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return root.LoadBalancer, resp, err
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}
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// Update an existing load balancer with new configuration.
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func (l *LoadBalancersServiceOp) Update(ctx context.Context, lbID string, lbr *LoadBalancerRequest) (*LoadBalancer, *Response, error) {
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path := fmt.Sprintf("%s/%s", loadBalancersBasePath, lbID)
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req, err := l.client.NewRequest(ctx, "PUT", path, lbr)
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if err != nil {
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return nil, nil, err
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}
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root := new(loadBalancerRoot)
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resp, err := l.client.Do(ctx, req, root)
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if err != nil {
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return nil, resp, err
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}
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return root.LoadBalancer, resp, err
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}
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// Delete a load balancer by its identifier.
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func (l *LoadBalancersServiceOp) Delete(ctx context.Context, ldID string) (*Response, error) {
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path := fmt.Sprintf("%s/%s", loadBalancersBasePath, ldID)
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req, err := l.client.NewRequest(ctx, http.MethodDelete, path, nil)
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if err != nil {
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return nil, err
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}
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return l.client.Do(ctx, req, nil)
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}
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// AddDroplets adds droplets to a load balancer.
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func (l *LoadBalancersServiceOp) AddDroplets(ctx context.Context, lbID string, dropletIDs ...int) (*Response, error) {
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path := fmt.Sprintf("%s/%s/%s", loadBalancersBasePath, lbID, dropletsPath)
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req, err := l.client.NewRequest(ctx, http.MethodPost, path, &dropletIDsRequest{IDs: dropletIDs})
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if err != nil {
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return nil, err
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}
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return l.client.Do(ctx, req, nil)
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}
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// RemoveDroplets removes droplets from a load balancer.
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func (l *LoadBalancersServiceOp) RemoveDroplets(ctx context.Context, lbID string, dropletIDs ...int) (*Response, error) {
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path := fmt.Sprintf("%s/%s/%s", loadBalancersBasePath, lbID, dropletsPath)
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req, err := l.client.NewRequest(ctx, http.MethodDelete, path, &dropletIDsRequest{IDs: dropletIDs})
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if err != nil {
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return nil, err
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}
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return l.client.Do(ctx, req, nil)
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}
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// AddForwardingRules adds forwarding rules to a load balancer.
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func (l *LoadBalancersServiceOp) AddForwardingRules(ctx context.Context, lbID string, rules ...ForwardingRule) (*Response, error) {
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path := fmt.Sprintf("%s/%s/%s", loadBalancersBasePath, lbID, forwardingRulesPath)
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req, err := l.client.NewRequest(ctx, http.MethodPost, path, &forwardingRulesRequest{Rules: rules})
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if err != nil {
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return nil, err
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}
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return l.client.Do(ctx, req, nil)
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}
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// RemoveForwardingRules removes forwarding rules from a load balancer.
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func (l *LoadBalancersServiceOp) RemoveForwardingRules(ctx context.Context, lbID string, rules ...ForwardingRule) (*Response, error) {
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path := fmt.Sprintf("%s/%s/%s", loadBalancersBasePath, lbID, forwardingRulesPath)
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req, err := l.client.NewRequest(ctx, http.MethodDelete, path, &forwardingRulesRequest{Rules: rules})
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if err != nil {
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return nil, err
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}
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return l.client.Do(ctx, req, nil)
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}
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