func CreateProxyInfo(zkConn zkhelper.Conn, productName string, pi *ProxyInfo) (string, error) {
data, err := json.Marshal(pi)
if err != nil {
return "", errors.Trace(err)
}
dir := GetProxyPath(productName)
zkhelper.CreateRecursive(zkConn, dir, "", 0, zkhelper.DefaultDirACLs())
return zkConn.Create(path.Join(dir, pi.Id), data, zk.FlagEphemeral, zkhelper.DefaultFileACLs())
}
func doResponseForTest(conn zkhelper.Conn, seq string, pi *ProxyInfo) error {
actionPath := GetActionResponsePath(productName) + "/" + seq
data, err := json.Marshal(pi)
if err != nil {
return errors.Trace(err)
}
_, err = conn.Create(path.Join(actionPath, pi.Id), data,
0, zkhelper.DefaultFileACLs())
return err
}
func CreateOrUpdate(zconn zkhelper.Conn, zkPath, value string, flags int, aclv []topo.ACL, recursive bool) (pathCreated string, err error) {
if recursive {
pathCreated, err = CreateRecursive(zconn, zkPath, value, flags, aclv)
} else {
pathCreated, err = zconn.Create(zkPath, []byte(value), int32(flags), aclv)
}
if err != nil && zkhelper.ZkErrorEqual(err, topo.ErrNodeExists) {
pathCreated = ""
_, err = zconn.Set(zkPath, []byte(value), -1)
}
return
}
// Create a path and any pieces required, think mkdir -p.
// Intermediate znodes are always created empty.
func CreateRecursive(zconn zkhelper.Conn, zkPath, value string, flags int, aclv []topo.ACL) (pathCreated string, err error) {
parts := strings.Split(zkPath, "/")
if parts[1] != zkhelper.MagicPrefix {
return "", fmt.Errorf("zkutil: non /%v path: %v", zkhelper.MagicPrefix, zkPath)
}
pathCreated, err = zconn.Create(zkPath, []byte(value), int32(flags), aclv)
if zkhelper.ZkErrorEqual(err, topo.ErrNoNode) {
// Make sure that nodes are either "file" or "directory" to mirror file system
// semantics.
dirAclv := make([]topo.ACL, len(aclv))
for i, acl := range aclv {
dirAclv[i] = acl
dirAclv[i].Perms = zkhelper.PERM_DIRECTORY
}
_, err = CreateRecursive(zconn, os_path.Dir(zkPath), "", 0, dirAclv)
if err != nil && !zkhelper.ZkErrorEqual(err, topo.ErrNodeExists) {
return "", err
}
pathCreated, err = zconn.Create(zkPath, []byte(value), int32(flags), aclv)
}
return
}
func NewActionWithTimeout(zkConn zkhelper.Conn, productName string, actionType ActionType, target interface{}, desc string, needConfirm bool, timeoutInMs int) error {
ts := strconv.FormatInt(time.Now().Unix(), 10)
action := &Action{
Type: actionType,
Desc: desc,
Target: target,
Ts: ts,
}
// set action receivers
proxies, err := ProxyList(zkConn, productName, func(p *ProxyInfo) bool {
return p.State == PROXY_STATE_ONLINE
})
if err != nil {
return errors.Trace(err)
}
if needConfirm {
// do fencing here, make sure 'offline' proxies are really offline
// now we only check whether the proxy lists are match
fenceProxies, err := GetFenceProxyMap(zkConn, productName)
if err != nil {
return errors.Trace(err)
}
for _, proxy := range proxies {
delete(fenceProxies, proxy.Addr)
}
if len(fenceProxies) > 0 {
errMsg := bytes.NewBufferString("Some proxies may not stop cleanly:")
for k, _ := range fenceProxies {
errMsg.WriteString(" ")
errMsg.WriteString(k)
}
return errors.Errorf("%s", errMsg)
}
}
for _, p := range proxies {
buf, err := json.Marshal(p)
if err != nil {
return errors.Trace(err)
}
action.Receivers = append(action.Receivers, string(buf))
}
b, _ := json.Marshal(action)
prefix := GetWatchActionPath(productName)
//action root path
err = CreateActionRootPath(zkConn, prefix)
if err != nil {
return errors.Trace(err)
}
//response path
respPath := path.Join(path.Dir(prefix), "ActionResponse")
err = CreateActionRootPath(zkConn, respPath)
if err != nil {
return errors.Trace(err)
}
//create response node, etcd do not support create in order directory
//get path first
actionRespPath, err := zkConn.Create(respPath+"/", b, int32(zk.FlagSequence), zkhelper.DefaultFileACLs())
if err != nil {
log.ErrorErrorf(err, "zk create resp node = %s", respPath)
return errors.Trace(err)
}
//remove file then create directory
zkConn.Delete(actionRespPath, -1)
actionRespPath, err = zkConn.Create(actionRespPath, b, 0, zkhelper.DefaultDirACLs())
if err != nil {
log.ErrorErrorf(err, "zk create resp node = %s", respPath)
return errors.Trace(err)
}
suffix := path.Base(actionRespPath)
// create action node
actionPath := path.Join(prefix, suffix)
_, err = zkConn.Create(actionPath, b, 0, zkhelper.DefaultFileACLs())
if err != nil {
log.ErrorErrorf(err, "zk create action path = %s", actionPath)
return errors.Trace(err)
}
if needConfirm {
if err := WaitForReceiverWithTimeout(zkConn, productName, actionRespPath, proxies, timeoutInMs); err != nil {
return errors.Trace(err)
}
}
return nil
}