wings/server/loader.go

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package server
import (
"fmt"
"github.com/apex/log"
"github.com/creasty/defaults"
"github.com/gammazero/workerpool"
"github.com/pkg/errors"
"github.com/pterodactyl/wings/api"
"github.com/pterodactyl/wings/environment"
"github.com/pterodactyl/wings/environment/docker"
"os"
"runtime"
"time"
)
var servers = NewCollection(nil)
func GetServers() *Collection {
return servers
}
// Iterates over a given directory and loads all of the servers listed before returning
// them to the calling function.
func LoadDirectory() error {
if len(servers.items) != 0 {
return errors.New("cannot call LoadDirectory with a non-nil collection")
}
log.Info("fetching list of servers from API")
configs, rerr, err := api.NewRequester().GetAllServerConfigurations()
if err != nil || rerr != nil {
if err != nil {
return errors.WithStack(err)
}
return errors.New(rerr.String())
}
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log.Debug("retrieving cached server states from disk")
states, err := getServerStates()
if err != nil {
log.WithField("error", errors.WithStack(err)).Error("failed to retrieve locally cached server states from disk, assuming all servers in offline state")
}
start := time.Now()
log.WithField("total_configs", len(configs)).Info("processing servers returned by the API")
pool := workerpool.New(runtime.NumCPU())
for uuid, data := range configs {
uuid := uuid
data := data
pool.Submit(func() {
log.WithField("server", uuid).Info("creating new server object from API response")
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s, err := FromConfiguration(data)
if err != nil {
log.WithField("server", uuid).WithField("error", err).Error("failed to load server, skipping...")
return
}
if state, exists := states[s.Id()]; exists {
s.Log().WithField("state", state).Debug("found existing server state in cache file; re-instantiating server state")
s.SetState(state)
}
servers.Add(s)
})
}
// Wait until we've processed all of the configuration files in the directory
// before continuing.
pool.StopWait()
diff := time.Now().Sub(start)
log.WithField("duration", fmt.Sprintf("%s", diff)).Info("finished processing server configurations")
return nil
}
// Initializes a server using a data byte array. This will be marshaled into the
// given struct using a YAML marshaler. This will also configure the given environment
// for a server.
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func FromConfiguration(data *api.ServerConfigurationResponse) (*Server, error) {
cfg := Configuration{}
if err := defaults.Set(&cfg); err != nil {
return nil, errors.WithMessage(err, "failed to set struct defaults for server configuration")
}
s := new(Server)
if err := defaults.Set(s); err != nil {
return nil, errors.WithMessage(err, "failed to set struct defaults for server")
}
s.cfg = cfg
if err := s.UpdateDataStructure(data.Settings, false); err != nil {
return nil, err
}
s.Archiver = Archiver{Server: s}
s.Filesystem = Filesystem{Server: s}
// Right now we only support a Docker based environment, so I'm going to hard code
// this logic in. When we're ready to support other environment we'll need to make
// some modifications here obviously.
envCfg := environment.NewConfiguration(s.Mounts(), s.cfg.Allocations, s.cfg.Build, s.cfg.EnvVars)
meta := docker.Metadata{
Invocation: s.Config().Invocation,
Image: s.Config().Container.Image,
}
if env, err := docker.New(s.Id(), &meta, envCfg); err != nil {
return nil, err
} else {
s.Environment = env
s.StartEventListeners()
}
// Forces the configuration to be synced with the panel.
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if err := s.SyncWithConfiguration(data); err != nil {
return nil, err
}
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// If the server's data directory exists, force disk usage calculation.
if _, err := os.Stat(s.Filesystem.Path()); err == nil {
go s.Filesystem.HasSpaceAvailable()
}
return s, nil
}