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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,121 @@ | ||
| package logic | ||
|
|
||
| import ( | ||
| "github.com/gravitl/netmaker/logger" | ||
| "github.com/gravitl/netmaker/logic" | ||
| "github.com/gravitl/netmaker/models" | ||
| ) | ||
|
|
||
| // SetFailover - finds a suitable failover candidate and sets it | ||
| func SetFailover(node *models.Node) error { | ||
| failoverNode := determineFailoverCandidate(node) | ||
| if failoverNode != nil { | ||
| return setFailoverNode(failoverNode, node) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| // ResetFailover - sets the failover node and wipes disconnected status | ||
| func ResetFailover(network string) error { | ||
| nodes, err := logic.GetNetworkNodes(network) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| for _, node := range nodes { | ||
| err = SetFailover(&node) | ||
| if err != nil { | ||
| logger.Log(2, "error setting failover for node", node.Name, ":", err.Error()) | ||
| } | ||
| err = WipeFailover(node.ID) | ||
| if err != nil { | ||
| logger.Log(2, "error wiping failover for node", node.Name, ":", err.Error()) | ||
| } | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| // determineFailoverCandidate - returns a list of nodes that | ||
| // are suitable for relaying a given node | ||
| func determineFailoverCandidate(nodeToBeRelayed *models.Node) *models.Node { | ||
|
|
||
| currentNetworkNodes, err := logic.GetNetworkNodes(nodeToBeRelayed.Network) | ||
| if err != nil { | ||
| return nil | ||
| } | ||
|
|
||
| currentMetrics, err := logic.GetMetrics(nodeToBeRelayed.ID) | ||
| if err != nil || currentMetrics == nil || currentMetrics.Connectivity == nil { | ||
| return nil | ||
| } | ||
|
|
||
| minLatency := int64(9223372036854775807) // max signed int64 value | ||
| var fastestCandidate *models.Node | ||
| for i := range currentNetworkNodes { | ||
| if currentNetworkNodes[i].ID == nodeToBeRelayed.ID { | ||
| continue | ||
| } | ||
|
|
||
| if currentMetrics.Connectivity[currentNetworkNodes[i].ID].Connected && (currentNetworkNodes[i].Failover == "yes") { | ||
| if currentMetrics.Connectivity[currentNetworkNodes[i].ID].Latency < int64(minLatency) { | ||
| fastestCandidate = ¤tNetworkNodes[i] | ||
| minLatency = currentMetrics.Connectivity[currentNetworkNodes[i].ID].Latency | ||
| } | ||
| } | ||
| } | ||
|
|
||
| return fastestCandidate | ||
| } | ||
|
|
||
| // setFailoverNode - changes node's failover node | ||
| func setFailoverNode(failoverNode, node *models.Node) error { | ||
|
|
||
| node.FailoverNode = failoverNode.ID | ||
| nodeToUpdate, err := logic.GetNodeByID(node.ID) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| if nodeToUpdate.FailoverNode == failoverNode.ID { | ||
| return nil | ||
| } | ||
| return logic.UpdateNode(&nodeToUpdate, node) | ||
| } | ||
|
|
||
| // WipeFailover - removes the failover peers of given node (ID) | ||
| func WipeFailover(nodeid string) error { | ||
| metrics, err := logic.GetMetrics(nodeid) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| if metrics != nil { | ||
| metrics.FailoverPeers = make(map[string]string) | ||
| return logic.UpdateMetrics(nodeid, metrics) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| // WipeAffectedFailoversOnly - wipes failovers for nodes that have given node (ID) | ||
| // in their respective failover lists | ||
| func WipeAffectedFailoversOnly(nodeid, network string) error { | ||
| currentNetworkNodes, err := logic.GetNetworkNodes(network) | ||
| if err != nil { | ||
| return nil | ||
| } | ||
| WipeFailover(nodeid) | ||
|
|
||
| for i := range currentNetworkNodes { | ||
| currNodeID := currentNetworkNodes[i].ID | ||
| if currNodeID == nodeid { | ||
| continue | ||
| } | ||
| currMetrics, err := logic.GetMetrics(currNodeID) | ||
| if err != nil || currMetrics == nil { | ||
| continue | ||
| } | ||
| if currMetrics.FailoverPeers != nil { | ||
| if len(currMetrics.FailoverPeers[nodeid]) > 0 { | ||
| WipeFailover(currNodeID) | ||
| } | ||
| } | ||
| } | ||
| return nil | ||
| } |
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