// SetServer tells all members to add the server to their database.
// rolls back on failure
func (r *Redis) SetServer(svcId string, server *core.Server) error {
conn := pool.Get()
defer conn.Close()
// publishStringJson to others
err := r.publishStringJson(conn, "set-server", svcId, server)
if err != nil {
return err
}
actionHash := fmt.Sprintf("%x", md5.Sum([]byte(fmt.Sprintf("set-server %s %s", *server, svcId))))
// ensure all members applied action
err = r.waitForMembers(conn, actionHash)
if err != nil {
uActionHash := fmt.Sprintf("%x", md5.Sum([]byte(fmt.Sprintf("delete-server %s %s", server.Id, svcId))))
// cleanup rollback cruft. clear actionHash ensures no mistakes on re-submit
defer conn.Do("DEL", uActionHash, actionHash)
// attempt rollback - no need to waitForMembers here
uerr := r.publishStringJson(conn, "delete-server", server.Id, svcId)
if uerr != nil {
err = fmt.Errorf("%v - %v", err, uerr)
}
return err
}
if database.CentralStore {
return database.SetServer(svcId, server)
}
return nil
}
func SetServer(svcId string, server *core.Server) error {
// // idempotent additions (don't update server on post)
// if srv, _ := database.GetServer(svcId, server.Id); srv != nil {
// return nil
// }
// apply to balancer
err := balance.SetServer(svcId, server)
if err != nil {
return err
}
if !database.CentralStore {
// save to backend
err = database.SetServer(svcId, server)
if err != nil {
// undo balance action
if uerr := balance.DeleteServer(svcId, server.Id); uerr != nil {
err = fmt.Errorf("%v - %v", err.Error(), uerr.Error())
}
return err
}
}
return nil
}
func (n None) SetServer(svcId string, server *core.Server) error {
err := common.SetServer(svcId, server)
if err != nil {
return err
}
if database.CentralStore {
return database.SetServer(svcId, server)
}
return nil
}
func TestSetServer(t *testing.T) {
database.SetService(&testService1)
if err := database.SetServer(testService1.Id, &testServer1); err != nil {
t.Errorf("Failed to SET server - %v", err)
}
service, err := ioutil.ReadFile("/tmp/scribbleTest/services/tcp-192_168_0_15-80.json")
if err != nil {
t.Error(err)
}
svc := testService1
svc.Servers = append(svc.Servers, testServer1)
jService, err := toJson(svc)
if err != nil {
t.Error(err)
}
if string(service) != string(jService) {
t.Errorf("Read service differs from written service")
}
}