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manager.go
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/
manager.go
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// Copyright 2016-2017 Authors of Cilium
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package node
import (
"net"
"sync"
"github.com/cilium/cilium/pkg/maps/tunnel"
log "github.com/Sirupsen/logrus"
)
var (
mutex sync.RWMutex
nodes = map[Identity]*Node{}
)
// GetNode returns the node with the given identity, if exists, from the nodes
// map.
func GetNode(ni Identity) *Node {
mutex.RLock()
n := nodes[ni]
mutex.RUnlock()
return n
}
func deleteNodeCIDR(ip *net.IPNet) {
if ip == nil {
return
}
if err := tunnel.DeleteTunnelEndpoint(ip.IP); err != nil {
log.Debugf("bpf: Unable to delete %s in tunnel endpoint map: %s", ip, err)
}
}
func updateNodeCIDR(ip *net.IPNet, host net.IP) {
if ip == nil {
return
}
if err := tunnel.SetTunnelEndpoint(ip.IP, host); err != nil {
log.Debugf("bpf: Unable to update %s in tunnel endpoint map: %s", ip, err)
}
}
// UpdateNode updates the new node in the nodes' map with the given identity.
func UpdateNode(ni Identity, n *Node) {
mutex.Lock()
if oldNode, ok := nodes[ni]; ok {
deleteNodeCIDR(oldNode.IPv4AllocCIDR)
deleteNodeCIDR(oldNode.IPv6AllocCIDR)
}
// FIXME if PodCIDR is empty retrieve the CIDR from the KVStore
log.Debugf("bpf: Setting tunnel endpoint %+v: %+v %+v",
n.GetNodeIP(false), n.IPv4AllocCIDR, n.IPv6AllocCIDR)
nodeIP := n.GetNodeIP(false)
updateNodeCIDR(n.IPv4AllocCIDR, nodeIP)
updateNodeCIDR(n.IPv6AllocCIDR, nodeIP)
nodes[ni] = n
mutex.Unlock()
}
// DeleteNode remove the node from the nodes' maps.
func DeleteNode(ni Identity) {
var err1, err2 error
mutex.Lock()
if n, ok := nodes[ni]; ok {
log.Debugf("bpf: Removing tunnel endpoint %+v: %+v %+v",
n.GetNodeIP(false), n.IPv4AllocCIDR, n.IPv6AllocCIDR)
if n.IPv4AllocCIDR != nil {
err1 = tunnel.DeleteTunnelEndpoint(n.IPv4AllocCIDR.IP)
if err1 == nil {
n.IPv4AllocCIDR = nil
}
}
if n.IPv6AllocCIDR != nil {
err2 = tunnel.DeleteTunnelEndpoint(n.IPv6AllocCIDR.IP)
if err2 == nil {
n.IPv6AllocCIDR = nil
}
}
}
// Keep node around
if err1 == nil && err2 == nil {
delete(nodes, ni)
}
mutex.Unlock()
}