func (alloc *Allocator) handleHTTPAllocate(dockerCli *docker.Client, w http.ResponseWriter, ident string, checkAlive bool, subnet address.CIDR) {
closedChan := w.(http.CloseNotifier).CloseNotify()
addr, err := alloc.Allocate(ident, subnet.HostRange(),
func() bool {
select {
case <-closedChan:
return true
default:
res := checkAlive && dockerCli != nil && dockerCli.IsContainerNotRunning(ident)
checkAlive = false // we check only once; if the container dies later we learn about that through events
return res
}
})
if err != nil {
if _, ok := err.(*errorCancelled); ok { // cancellation is not really an error
common.Log.Infoln("[allocator]:", err.Error())
fmt.Fprint(w, "cancelled")
return
}
badRequest(w, err)
return
}
fmt.Fprintf(w, "%s/%d", addr, subnet.PrefixLen)
}
func NewStatus(allocator *Allocator, defaultSubnet address.CIDR) *Status {
if allocator == nil {
return nil
}
var paxosStatus *paxos.Status
if allocator.awaitingConsensus && allocator.paxos != nil {
if allocator.paxos.IsElector() {
if node, ok := allocator.paxos.(*paxos.Node); ok {
paxosStatus = paxos.NewStatus(node)
}
} else {
paxosStatus = &paxos.Status{Elector: false}
}
}
resultChan := make(chan *Status)
allocator.actionChan <- func() {
resultChan <- &Status{
paxosStatus,
allocator.universe.String(),
int(allocator.universe.Size()),
defaultSubnet.String(),
newEntryStatusSlice(allocator),
newClaimStatusSlice(allocator),
newAllocateIdentSlice(allocator)}
}
return <-resultChan
}
func (alloc *Allocator) handleHTTPAllocate(dockerCli *docker.Client, w http.ResponseWriter, ident string, checkAlive bool, subnet address.CIDR) {
closedChan := w.(http.CloseNotifier).CloseNotify()
addr, err := alloc.Allocate(ident, subnet.HostRange(), closedChan)
if err != nil {
if _, ok := err.(*errorCancelled); ok { // cancellation is not really an error
common.Log.Infoln("[allocator]:", err.Error())
fmt.Fprint(w, "cancelled")
return
}
badRequest(w, err)
return
}
if checkAlive && dockerCli != nil && dockerCli.IsContainerNotRunning(ident) {
common.Log.Infof("[allocator] '%s' is not running: freeing %s", ident, addr)
alloc.Free(ident, addr)
fmt.Fprint(w, "cancelled")
return
}
fmt.Fprintf(w, "%s/%d", addr, subnet.PrefixLen)
}
func NewStatus(allocator *Allocator, defaultSubnet address.CIDR) *Status {
if allocator == nil {
return nil
}
var paxosStatus *paxos.Status
if allocator.paxosTicker != nil {
paxosStatus = paxos.NewStatus(allocator.paxos)
}
resultChan := make(chan *Status)
allocator.actionChan <- func() {
resultChan <- &Status{
paxosStatus,
allocator.universe.String(),
defaultSubnet.String(),
newEntryStatusSlice(allocator),
newClaimStatusSlice(allocator),
newAllocateIdentSlice(allocator)}
}
return <-resultChan
}
// HandleHTTP wires up ipams HTTP endpoints to the provided mux.
func (alloc *Allocator) HandleHTTP(router *mux.Router, defaultSubnet address.CIDR, dockerCli *docker.Client) {
router.Methods("PUT").Path("/ip/{id}/{ip}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
ident := vars["id"]
ipStr := vars["ip"]
noErrorOnUnknown := r.FormValue("noErrorOnUnknown") == "true"
if ip, err := address.ParseIP(ipStr); err != nil {
badRequest(w, err)
return
} else if err := alloc.Claim(ident, ip, noErrorOnUnknown); err != nil {
badRequest(w, fmt.Errorf("Unable to claim: %s", err))
return
}
w.WriteHeader(204)
})
router.Methods("GET").Path("/ip/{id}/{ip}/{prefixlen}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
if subnet, ok := parseCIDR(w, vars["ip"]+"/"+vars["prefixlen"]); ok {
addr, err := alloc.Lookup(vars["id"], subnet.HostRange())
if err != nil {
http.NotFound(w, r)
return
}
fmt.Fprintf(w, "%s/%d", addr, subnet.PrefixLen)
}
})
router.Methods("GET").Path("/ip/{id}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
addr, err := alloc.Lookup(mux.Vars(r)["id"], defaultSubnet.HostRange())
if err != nil {
http.NotFound(w, r)
return
}
fmt.Fprintf(w, "%s/%d", addr, defaultSubnet.PrefixLen)
})
router.Methods("POST").Path("/ip/{id}/{ip}/{prefixlen}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
if subnet, ok := parseCIDR(w, vars["ip"]+"/"+vars["prefixlen"]); ok {
alloc.handleHTTPAllocate(dockerCli, w, vars["id"], r.FormValue("check-alive") == "true", subnet)
}
})
router.Methods("POST").Path("/ip/{id}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
alloc.handleHTTPAllocate(dockerCli, w, vars["id"], r.FormValue("check-alive") == "true", defaultSubnet)
})
router.Methods("DELETE").Path("/ip/{id}/{ip}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
ident := vars["id"]
ipStr := vars["ip"]
if ip, err := address.ParseIP(ipStr); err != nil {
badRequest(w, err)
return
} else if err := alloc.Free(ident, ip); err != nil {
badRequest(w, fmt.Errorf("Unable to free: %s", err))
return
}
w.WriteHeader(204)
})
router.Methods("DELETE").Path("/ip/{id}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
ident := mux.Vars(r)["id"]
if err := alloc.Delete(ident); err != nil {
badRequest(w, err)
return
}
w.WriteHeader(204)
})
router.Methods("DELETE").Path("/peer").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
alloc.Shutdown()
w.WriteHeader(204)
})
router.Methods("DELETE").Path("/peer/{id}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
ident := mux.Vars(r)["id"]
if err := alloc.AdminTakeoverRanges(ident); err != nil {
badRequest(w, err)
return
}
w.WriteHeader(204)
})
}
// HandleHTTP wires up ipams HTTP endpoints to the provided mux.
func (alloc *Allocator) HandleHTTP(router *mux.Router, defaultSubnet address.CIDR, dockerCli *docker.Client) {
router.Methods("PUT").Path("/ip/{id}/{ip}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
closedChan := w.(http.CloseNotifier).CloseNotify()
vars := mux.Vars(r)
ident := vars["id"]
ipStr := vars["ip"]
if ip, err := address.ParseIP(ipStr); err != nil {
badRequest(w, err)
return
} else if err := alloc.Claim(ident, ip, closedChan); err != nil {
badRequest(w, fmt.Errorf("Unable to claim: %s", err))
return
}
w.WriteHeader(204)
})
router.Methods("GET").Path("/ip/{id}/{ip}/{prefixlen}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
cidr := vars["ip"] + "/" + vars["prefixlen"]
_, subnet, err := address.ParseCIDR(cidr)
if err != nil {
badRequest(w, err)
return
}
addr, err := alloc.Lookup(vars["id"], subnet.HostRange())
if err != nil {
http.NotFound(w, r)
return
}
fmt.Fprintf(w, "%s/%d", addr, subnet.PrefixLen)
})
router.Methods("GET").Path("/ip/{id}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
addr, err := alloc.Lookup(mux.Vars(r)["id"], defaultSubnet.HostRange())
if err != nil {
http.NotFound(w, r)
return
}
fmt.Fprintf(w, "%s/%d", addr, defaultSubnet.PrefixLen)
})
router.Methods("POST").Path("/ip/{id}/{ip}/{prefixlen}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
closedChan := w.(http.CloseNotifier).CloseNotify()
vars := mux.Vars(r)
ident := vars["id"]
cidrStr := vars["ip"] + "/" + vars["prefixlen"]
subnetAddr, cidr, err := address.ParseCIDR(cidrStr)
if err != nil {
badRequest(w, err)
return
}
if cidr.Start != subnetAddr {
badRequest(w, fmt.Errorf("Invalid subnet %s - bits after network prefix are not all zero", cidrStr))
return
}
addr, err := alloc.Allocate(ident, cidr.HostRange(), closedChan)
if err != nil {
badRequest(w, fmt.Errorf("Unable to allocate: %s", err))
return
}
if r.FormValue("check-alive") == "true" && dockerCli != nil && dockerCli.IsContainerNotRunning(ident) {
common.Log.Infof("[allocator] '%s' is not running: freeing %s", ident, addr)
alloc.Free(ident, addr)
return
}
fmt.Fprintf(w, "%s/%d", addr, cidr.PrefixLen)
})
router.Methods("POST").Path("/ip/{id}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
closedChan := w.(http.CloseNotifier).CloseNotify()
ident := mux.Vars(r)["id"]
newAddr, err := alloc.Allocate(ident, defaultSubnet.HostRange(), closedChan)
if err != nil {
badRequest(w, err)
return
}
if r.FormValue("check-alive") == "true" && dockerCli != nil && dockerCli.IsContainerNotRunning(ident) {
common.Log.Infof("[allocator] '%s' is not running: freeing %s", ident, newAddr)
alloc.Free(ident, newAddr)
return
}
fmt.Fprintf(w, "%s/%d", newAddr, defaultSubnet.PrefixLen)
})
router.Methods("DELETE").Path("/ip/{id}/{ip}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
ident := vars["id"]
ipStr := vars["ip"]
if ip, err := address.ParseIP(ipStr); err != nil {
badRequest(w, err)
return
} else if err := alloc.Free(ident, ip); err != nil {
badRequest(w, fmt.Errorf("Unable to free: %s", err))
return
}
w.WriteHeader(204)
})
router.Methods("DELETE").Path("/ip/{id}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
ident := mux.Vars(r)["id"]
if err := alloc.Delete(ident); err != nil {
badRequest(w, err)
return
}
w.WriteHeader(204)
})
router.Methods("DELETE").Path("/peer").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
alloc.Shutdown()
w.WriteHeader(204)
})
router.Methods("DELETE").Path("/peer/{id}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
ident := mux.Vars(r)["id"]
if err := alloc.AdminTakeoverRanges(ident); err != nil {
badRequest(w, err)
return
}
w.WriteHeader(204)
})
}
// HandleHTTP wires up ipams HTTP endpoints to the provided mux.
func (alloc *Allocator) HandleHTTP(router *mux.Router, defaultSubnet address.CIDR, tracker string, dockerCli *docker.Client) {
router.Methods("GET").Path("/ipinfo/defaultsubnet").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, "%s", defaultSubnet)
})
router.Methods("PUT").Path("/ip/{id}/{ip}/{prefixlen}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
if cidr, ok := parseCIDR(w, vars["ip"]+"/"+vars["prefixlen"], false); ok {
ident := vars["id"]
checkAlive := r.FormValue("check-alive") == "true"
noErrorOnUnknown := r.FormValue("noErrorOnUnknown") == "true"
alloc.handleHTTPClaim(dockerCli, w, ident, cidr, checkAlive, noErrorOnUnknown)
}
})
router.Methods("GET").Path("/ring").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
alloc.Prime()
})
router.Methods("GET").Path("/ip/{id}/{ip}/{prefixlen}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
if subnet, ok := parseCIDR(w, vars["ip"]+"/"+vars["prefixlen"], true); ok {
cidrs, err := alloc.Lookup(vars["id"], subnet.HostRange())
if err != nil {
http.NotFound(w, r)
return
}
writeAddresses(w, cidrs)
}
})
router.Methods("GET").Path("/ip/{id}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
addrs, err := alloc.Lookup(mux.Vars(r)["id"], defaultSubnet.HostRange())
if err != nil {
http.NotFound(w, r)
return
}
writeAddresses(w, addrs)
})
router.Methods("POST").Path("/ip/{id}/{ip}/{prefixlen}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
if subnet, ok := parseCIDR(w, vars["ip"]+"/"+vars["prefixlen"], true); ok {
alloc.handleHTTPAllocate(dockerCli, w, vars["id"], r.FormValue("check-alive") == "true", subnet)
}
})
router.Methods("POST").Path("/ip/{id}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
alloc.handleHTTPAllocate(dockerCli, w, vars["id"], r.FormValue("check-alive") == "true", defaultSubnet)
})
router.Methods("DELETE").Path("/ip/{id}/{ip}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
ident := vars["id"]
ipStr := vars["ip"]
if ip, err := address.ParseIP(ipStr); err != nil {
badRequest(w, err)
return
} else if err := alloc.Free(ident, ip); err != nil {
badRequest(w, fmt.Errorf("Unable to free: %s", err))
return
}
w.WriteHeader(204)
})
router.Methods("DELETE").Path("/ip/{id}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
ident := mux.Vars(r)["id"]
if err := alloc.Delete(ident); err != nil {
badRequest(w, err)
return
}
w.WriteHeader(204)
})
router.Methods("DELETE").Path("/peer").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
alloc.Shutdown()
w.WriteHeader(204)
})
router.Methods("DELETE").Path("/peer/{id}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
ident := mux.Vars(r)["id"]
transferred := alloc.AdminTakeoverRanges(ident)
fmt.Fprintf(w, "%d IPs taken over from %s\n", transferred, ident)
})
router.Methods("GET").Path("/ipinfo/tracker").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, tracker)
})
}