models

type Healthcheck struct {
	Type HealthcheckType `json:"type"`
	Host string          `json:"host"`
	Port int             `json:"port"`
}

type HealthcheckType string

type Host struct {
	Hostname string `json:"hostname"` // Hostname of this host
	LeaseID  int64  `json:"lease_id"` // LeaseID current lease ID of this host
	// DataVersion is the version number of how the data is stored in etcd for this host. This field is introduced in 2.0.0. But the data format version v0 correspond to the format before v1.9.0.
	DataVersion int `json:"data_version,omitempty"`
}

type IP struct {
	ID                  string        `json:"id"`                   // ID of this Virtual IP (strarting with vip-)
	IP                  string        `json:"ip"`                   // Full IP with mask (i.e. 10.0.0.1/32)
	Status              string        `json:"status,omitempty"`     // Status of this VIP
	Checks              []Healthcheck `json:"checks,omitempty"`     // Healthcheck configured with this VIP
	HealthcheckInterval int           `json:"healthcheck_interval"` // HealthcheckIntevals for this VIP
}

type IPLink struct {
	UpdatedAt time.Time `json:"updated_at"`
}

type Storage interface {
	GetIPs(context.Context) ([]IP, error) // GetIPs configured for this host
	AddIP(context.Context, IP) (IP, error)
	UpdateIP(ctx context.Context, ip IP) error
	RemoveIP(context.Context, string) error

	GetCurrentHost(context.Context) (Host, error) // Get host configuration for the current host
	SaveHost(context.Context, Host) error         // Save host modifications

	LinkIPWithCurrentHost(context.Context, IP) error   // Link an IP to the current host
	UnlinkIPFromCurrentHost(context.Context, IP) error // Unlink an IP from the current host
	GetIPHosts(context.Context, IP) ([]string, error)  // List all hosts linked to the IP
}