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Add schema migration

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This commit is contained in:
Aleksey Dmitrevskiy 2019-02-27 16:15:36 +03:00
parent 87c8114291
commit 3a9d436f8a
4 changed files with 91 additions and 44 deletions
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52
control.go
View File

@ -57,10 +57,10 @@ func returnOK(w http.ResponseWriter) {
}
}
func httpError(w http.ResponseWriter, code int, format string, args ...interface{}) {
func httpError(w *http.ResponseWriter, code int, format string, args ...interface{}) {
text := fmt.Sprintf(format, args...)
log.Println(text)
http.Error(w, text, code)
http.Error(*w, text, code)
}
// ---------------
@ -78,7 +78,7 @@ func writeAllConfigsAndReloadDNS() error {
func httpUpdateConfigReloadDNSReturnOK(w http.ResponseWriter, r *http.Request) {
err := writeAllConfigsAndReloadDNS()
if err != nil {
httpError(w, http.StatusInternalServerError, "Couldn't write config file: %s", err)
httpError(&w, http.StatusInternalServerError, "Couldn't write config file: %s", err)
return
}
returnOK(w)
@ -334,9 +334,7 @@ func handleSetBootstrapDNS(w http.ResponseWriter, r *http.Request) {
func setDNSServers(w *http.ResponseWriter, r *http.Request, upstreams bool) {
body, err := ioutil.ReadAll(r.Body)
if err != nil {
errorText := fmt.Sprintf("Failed to read request body: %s", err)
log.Println(errorText)
http.Error(*w, errorText, http.StatusBadRequest)
httpError(w, http.StatusBadRequest, "Failed to read request body: %s", err)
return
}
// if empty body -- user is asking for default servers
@ -379,23 +377,17 @@ func setDNSServers(w *http.ResponseWriter, r *http.Request, upstreams bool) {
err = writeAllConfigs()
if err != nil {
errorText := fmt.Sprintf("Couldn't write config file: %s", err)
log.Println(errorText)
http.Error(*w, errorText, http.StatusInternalServerError)
httpError(w, http.StatusInternalServerError, "Couldn't write config file: %s", err)
return
}
err = reconfigureDNSServer()
if err != nil {
errorText := fmt.Sprintf("Couldn't reconfigure the DNS server: %s", err)
log.Println(errorText)
http.Error(*w, errorText, http.StatusInternalServerError)
httpError(w, http.StatusInternalServerError, "Couldn't reconfigure the DNS server: %s", err)
return
}
_, err = fmt.Fprintf(*w, "OK %d servers\n", count)
if err != nil {
errorText := fmt.Sprintf("Couldn't write body: %s", err)
log.Println(errorText)
http.Error(*w, errorText, http.StatusInternalServerError)
httpError(w, http.StatusInternalServerError, "Couldn't write body: %s", err)
}
}
@ -574,7 +566,7 @@ func handleFilteringAddURL(w http.ResponseWriter, r *http.Request) {
f := filter{}
err := json.NewDecoder(r.Body).Decode(&f)
if err != nil {
httpError(w, http.StatusBadRequest, "Failed to parse request body json: %s", err)
httpError(&w, http.StatusBadRequest, "Failed to parse request body json: %s", err)
return
}
@ -975,7 +967,7 @@ func handleInstallGetAddresses(w http.ResponseWriter, r *http.Request) {
ifaces, err := getValidNetInterfacesForWeb()
if err != nil {
httpError(w, http.StatusInternalServerError, "Couldn't get interfaces: %s", err)
httpError(&w, http.StatusInternalServerError, "Couldn't get interfaces: %s", err)
return
}
@ -987,7 +979,7 @@ func handleInstallGetAddresses(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
err = json.NewEncoder(w).Encode(data)
if err != nil {
httpError(w, http.StatusInternalServerError, "Unable to marshal default addresses to json: %s", err)
httpError(&w, http.StatusInternalServerError, "Unable to marshal default addresses to json: %s", err)
return
}
}
@ -996,7 +988,7 @@ func handleInstallConfigure(w http.ResponseWriter, r *http.Request) {
newSettings := firstRunData{}
err := json.NewDecoder(r.Body).Decode(&newSettings)
if err != nil {
httpError(w, http.StatusBadRequest, "Failed to parse new config json: %s", err)
httpError(&w, http.StatusBadRequest, "Failed to parse new config json: %s", err)
return
}
@ -1010,14 +1002,14 @@ func handleInstallConfigure(w http.ResponseWriter, r *http.Request) {
if restartHTTP {
err = checkPortAvailable(newSettings.Web.IP, newSettings.Web.Port)
if err != nil {
httpError(w, http.StatusBadRequest, "Impossible to listen on IP:port %s due to %s", net.JoinHostPort(newSettings.Web.IP, strconv.Itoa(newSettings.Web.Port)), err)
httpError(&w, http.StatusBadRequest, "Impossible to listen on IP:port %s due to %s", net.JoinHostPort(newSettings.Web.IP, strconv.Itoa(newSettings.Web.Port)), err)
return
}
}
err = checkPacketPortAvailable(newSettings.DNS.IP, newSettings.DNS.Port)
if err != nil {
httpError(w, http.StatusBadRequest, "Impossible to listen on IP:port %s due to %s", net.JoinHostPort(newSettings.DNS.IP, strconv.Itoa(newSettings.DNS.Port)), err)
httpError(&w, http.StatusBadRequest, "Impossible to listen on IP:port %s due to %s", net.JoinHostPort(newSettings.DNS.IP, strconv.Itoa(newSettings.DNS.Port)), err)
return
}
@ -1032,7 +1024,7 @@ func handleInstallConfigure(w http.ResponseWriter, r *http.Request) {
if config.DNS.Port != 0 {
err = startDNSServer()
if err != nil {
httpError(w, http.StatusInternalServerError, "Couldn't start DNS server: %s", err)
httpError(&w, http.StatusInternalServerError, "Couldn't start DNS server: %s", err)
return
}
}
@ -1057,7 +1049,7 @@ func handleTLSStatus(w http.ResponseWriter, r *http.Request) {
func handleTLSValidate(w http.ResponseWriter, r *http.Request) {
data, err := unmarshalTLS(r)
if err != nil {
httpError(w, http.StatusBadRequest, "Failed to unmarshal TLS config: %s", err)
httpError(&w, http.StatusBadRequest, "Failed to unmarshal TLS config: %s", err)
return
}
@ -1070,7 +1062,7 @@ func handleTLSValidate(w http.ResponseWriter, r *http.Request) {
if !alreadyRunning {
err = checkPortAvailable(config.BindHost, data.PortHTTPS)
if err != nil {
httpError(w, http.StatusBadRequest, "port %d is not available, cannot enable HTTPS on it", data.PortHTTPS)
httpError(&w, http.StatusBadRequest, "port %d is not available, cannot enable HTTPS on it", data.PortHTTPS)
return
}
}
@ -1082,7 +1074,7 @@ func handleTLSValidate(w http.ResponseWriter, r *http.Request) {
func handleTLSConfigure(w http.ResponseWriter, r *http.Request) {
data, err := unmarshalTLS(r)
if err != nil {
httpError(w, http.StatusBadRequest, "Failed to unmarshal TLS config: %s", err)
httpError(&w, http.StatusBadRequest, "Failed to unmarshal TLS config: %s", err)
return
}
@ -1095,7 +1087,7 @@ func handleTLSConfigure(w http.ResponseWriter, r *http.Request) {
if !alreadyRunning {
err = checkPortAvailable(config.BindHost, data.PortHTTPS)
if err != nil {
httpError(w, http.StatusBadRequest, "port %d is not available, cannot enable HTTPS on it", data.PortHTTPS)
httpError(&w, http.StatusBadRequest, "port %d is not available, cannot enable HTTPS on it", data.PortHTTPS)
return
}
}
@ -1109,7 +1101,7 @@ func handleTLSConfigure(w http.ResponseWriter, r *http.Request) {
config.TLS = data
err = writeAllConfigsAndReloadDNS()
if err != nil {
httpError(w, http.StatusInternalServerError, "Couldn't write config file: %s", err)
httpError(&w, http.StatusInternalServerError, "Couldn't write config file: %s", err)
return
}
marshalTLS(w, data)
@ -1328,7 +1320,7 @@ func marshalTLS(w http.ResponseWriter, data tlsConfig) {
}
err := json.NewEncoder(w).Encode(data)
if err != nil {
httpError(w, http.StatusInternalServerError, "Failed to marshal json with TLS status: %s", err)
httpError(&w, http.StatusInternalServerError, "Failed to marshal json with TLS status: %s", err)
return
}
}
@ -1338,12 +1330,12 @@ func marshalTLS(w http.ResponseWriter, data tlsConfig) {
// --------------
func handleDOH(w http.ResponseWriter, r *http.Request) {
if r.TLS == nil {
httpError(w, http.StatusNotFound, "Not Found")
httpError(&w, http.StatusNotFound, "Not Found")
return
}
if !isRunning() {
httpError(w, http.StatusInternalServerError, "DNS server is not running")
httpError(&w, http.StatusInternalServerError, "DNS server is not running")
return
}

16
dhcp.go
View File

@ -37,7 +37,7 @@ func handleDHCPStatus(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
err := json.NewEncoder(w).Encode(status)
if err != nil {
httpError(w, http.StatusInternalServerError, "Unable to marshal DHCP status json: %s", err)
httpError(&w, http.StatusInternalServerError, "Unable to marshal DHCP status json: %s", err)
return
}
}
@ -46,14 +46,14 @@ func handleDHCPSetConfig(w http.ResponseWriter, r *http.Request) {
newconfig := dhcpd.ServerConfig{}
err := json.NewDecoder(r.Body).Decode(&newconfig)
if err != nil {
httpError(w, http.StatusBadRequest, "Failed to parse new DHCP config json: %s", err)
httpError(&w, http.StatusBadRequest, "Failed to parse new DHCP config json: %s", err)
return
}
if newconfig.Enabled {
err := dhcpServer.Start(&newconfig)
if err != nil {
httpError(w, http.StatusBadRequest, "Failed to start DHCP server: %s", err)
httpError(&w, http.StatusBadRequest, "Failed to start DHCP server: %s", err)
return
}
}
@ -72,7 +72,7 @@ func handleDHCPInterfaces(w http.ResponseWriter, r *http.Request) {
ifaces, err := getValidNetInterfaces()
if err != nil {
httpError(w, http.StatusInternalServerError, "Couldn't get interfaces: %s", err)
httpError(&w, http.StatusInternalServerError, "Couldn't get interfaces: %s", err)
return
}
@ -87,7 +87,7 @@ func handleDHCPInterfaces(w http.ResponseWriter, r *http.Request) {
}
addrs, err := iface.Addrs()
if err != nil {
httpError(w, http.StatusInternalServerError, "Failed to get addresses for interface %s: %s", iface.Name, err)
httpError(&w, http.StatusInternalServerError, "Failed to get addresses for interface %s: %s", iface.Name, err)
return
}
@ -105,7 +105,7 @@ func handleDHCPInterfaces(w http.ResponseWriter, r *http.Request) {
ipnet, ok := addr.(*net.IPNet)
if !ok {
// not an IPNet, should not happen
httpError(w, http.StatusInternalServerError, "SHOULD NOT HAPPEN: got iface.Addrs() element %s that is not net.IPNet, it is %T", addr, addr)
httpError(&w, http.StatusInternalServerError, "SHOULD NOT HAPPEN: got iface.Addrs() element %s that is not net.IPNet, it is %T", addr, addr)
return
}
// ignore link-local
@ -122,7 +122,7 @@ func handleDHCPInterfaces(w http.ResponseWriter, r *http.Request) {
err = json.NewEncoder(w).Encode(response)
if err != nil {
httpError(w, http.StatusInternalServerError, "Failed to marshal json with available interfaces: %s", err)
httpError(&w, http.StatusInternalServerError, "Failed to marshal json with available interfaces: %s", err)
return
}
}
@ -153,7 +153,7 @@ func handleDHCPFindActiveServer(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
err = json.NewEncoder(w).Encode(result)
if err != nil {
httpError(w, http.StatusInternalServerError, "Failed to marshal DHCP found json: %s", err)
httpError(&w, http.StatusInternalServerError, "Failed to marshal DHCP found json: %s", err)
return
}
}

1
go.mod
View File

@ -13,6 +13,7 @@ require (
github.com/kardianos/service v0.0.0-20181115005516-4c239ee84e7b
github.com/krolaw/dhcp4 v0.0.0-20180925202202-7cead472c414
github.com/miekg/dns v1.1.1
github.com/pkg/errors v0.8.0
github.com/shirou/gopsutil v2.18.10+incompatible
github.com/shirou/w32 v0.0.0-20160930032740-bb4de0191aa4 // indirect
github.com/stretchr/testify v1.2.2

66
upgrade.go
View File

@ -1,6 +1,7 @@
package main
import (
"errors"
"fmt"
"io/ioutil"
"os"
@ -10,7 +11,7 @@ import (
yaml "gopkg.in/yaml.v2"
)
const currentSchemaVersion = 2 // used for upgrading from old configs to new config
const currentSchemaVersion = 3 // used for upgrading from old configs to new config
// Performs necessary upgrade operations if needed
func upgradeConfig() error {
@ -59,12 +60,17 @@ func upgradeConfig() error {
func upgradeConfigSchema(oldVersion int, diskConfig *map[string]interface{}) error {
switch oldVersion {
case 0:
err := upgradeSchema0to2(diskConfig)
err := upgradeSchema0to3(diskConfig)
if err != nil {
return err
}
case 1:
err := upgradeSchema1to2(diskConfig)
err := upgradeSchema1to3(diskConfig)
if err != nil {
return err
}
case 2:
err := upgradeSchema2to3(diskConfig)
if err != nil {
return err
}
@ -135,12 +141,60 @@ func upgradeSchema1to2(diskConfig *map[string]interface{}) error {
return nil
}
// jump two schemas at once -- this time we just do it sequentially
func upgradeSchema0to2(diskConfig *map[string]interface{}) error {
// Third schema upgrade:
// Bootstrap DNS becomes an array
func upgradeSchema2to3(diskConfig *map[string]interface{}) error {
log.Printf("%s(): called", _Func())
// Let's read dns configuration from diskConfig
dnsConfig, ok := (*diskConfig)["dns"]
if !ok {
return errors.New("no DNS configuration in config file")
}
// Convert interface{} to map[string]interface{}
newDNSConfig := make(map[string]interface{})
switch v := dnsConfig.(type) {
case map[interface{}]interface{}:
for k, v := range v {
newDNSConfig[fmt.Sprint(k)] = v
}
default:
return errors.New("DNS configuration is not a map")
}
// Replace bootstrap_dns value filed with new array contains old bootstrap_dns inside
if bootstrapDNS, ok := (newDNSConfig)["bootstrap_dns"]; ok {
newBootstrapConfig := []string{fmt.Sprint(bootstrapDNS)}
(newDNSConfig)["bootstrap_dns"] = newBootstrapConfig
(*diskConfig)["dns"] = newDNSConfig
} else {
return errors.New("no bootstrap DNS in DNS config")
}
// Bump schema version
(*diskConfig)["schema_version"] = 3
return nil
}
// jump three schemas at once -- this time we just do it sequentially
func upgradeSchema0to3(diskConfig *map[string]interface{}) error {
err := upgradeSchema0to1(diskConfig)
if err != nil {
return err
}
return upgradeSchema1to2(diskConfig)
return upgradeSchema1to3(diskConfig)
}
// jump two schemas at once -- this time we just do it sequentially
func upgradeSchema1to3(diskConfig *map[string]interface{}) error {
err := upgradeSchema1to2(diskConfig)
if err != nil {
return err
}
return upgradeSchema2to3(diskConfig)
}