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Pull request 1984: AG-25392 confmigrate vol.1

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Merge in DNS/adguard-home from AG-25392-confmigrate to master

Squashed commit of the following:

commit 695717573e228a71e387d1b597f0d32f2eb20e67
Merge: 2c4f3e096 27ec6cd59
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Thu Aug 31 16:22:55 2023 +0300

    Merge branch 'master' into AG-25392-confmigrate

commit 2c4f3e096bb14724c0d0fcc20e5ac1462068504e
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Thu Aug 31 16:13:14 2023 +0300

    all: imp code

commit 0fc6854598a67fc5ea74a93ff8c99b32886f43f1
Merge: 719f2db95 a2ca8b5b4
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Wed Aug 30 18:30:36 2023 +0300

    Merge branch 'master' into AG-25392-confmigrate

commit 719f2db95a337f343752f5b18ce935bae83127be
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Wed Aug 30 15:50:52 2023 +0300

    home: don't reread config

commit 2e25fb738b11675d25574da9e5eebacd72a793ba
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Wed Aug 30 15:43:57 2023 +0300

    all: imp code

commit be3021f03097e18228dd9904dacc283f2576472e
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Wed Aug 30 15:25:46 2023 +0300

    all: introduce confmigrate
This commit is contained in:
Eugene Burkov 2023-08-31 16:34:15 +03:00
parent 27ec6cd59e
commit 53625d8913
6 changed files with 252 additions and 193 deletions
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143
internal/confmigrate/confmigrate.go Normal file
View file

@ -0,0 +1,143 @@
// Package confmigrate provides a way to upgrade the YAML configuration file.
package confmigrate
import (
"bytes"
"fmt"
"github.com/AdguardTeam/golibs/log"
yaml "gopkg.in/yaml.v3"
)
// CurrentSchemaVersion is the current schema version.
const CurrentSchemaVersion = 26
// These aliases are provided for convenience.
type (
yarr = []any
yobj = map[string]any
)
// Config is a the configuration for initializing a [Migrator].
type Config struct {
// WorkingDir is an absolute path to the working directory of AdGuardHome.
WorkingDir string
}
// Migrator performs the YAML configuration file migrations.
type Migrator struct {
// workingDir is an absolute path to the working directory of AdGuardHome.
workingDir string
}
// New creates a new Migrator.
func New(cfg *Config) (m *Migrator) {
return &Migrator{
workingDir: cfg.WorkingDir,
}
}
// Migrate does necessary upgrade operations if needed. It returns the new
// configuration file body, and a boolean indicating whether the configuration
// file was actually upgraded.
func (m *Migrator) Migrate(body []byte) (newBody []byte, upgraded bool, err error) {
// read a config file into an interface map, so we can manipulate values without losing any
diskConf := yobj{}
err = yaml.Unmarshal(body, &diskConf)
if err != nil {
log.Printf("parsing config file for upgrade: %s", err)
return nil, false, err
}
schemaVersionVal, ok := diskConf["schema_version"]
log.Tracef("got schema version %v", schemaVersionVal)
if !ok {
// no schema version, set it to 0
schemaVersionVal = 0
}
schemaVersion, ok := schemaVersionVal.(int)
if !ok {
err = fmt.Errorf("configuration file contains non-integer schema_version, abort")
log.Println(err)
return nil, false, err
}
if schemaVersion == CurrentSchemaVersion {
// do nothing
return body, false, nil
}
err = m.upgradeConfigSchema(schemaVersion, diskConf)
if err != nil {
log.Printf("upgrading configuration file: %s", err)
return nil, false, err
}
buf := &bytes.Buffer{}
enc := yaml.NewEncoder(buf)
enc.SetIndent(2)
err = enc.Encode(diskConf)
if err != nil {
return nil, false, fmt.Errorf("generating new config: %w", err)
}
return buf.Bytes(), true, nil
}
// upgradeFunc is a function that upgrades a config and returns an error.
type upgradeFunc = func(diskConf yobj) (err error)
// Upgrade from oldVersion to newVersion
func (m *Migrator) upgradeConfigSchema(oldVersion int, diskConf yobj) (err error) {
upgrades := []upgradeFunc{
m.upgradeSchema0to1,
m.upgradeSchema1to2,
upgradeSchema2to3,
upgradeSchema3to4,
upgradeSchema4to5,
upgradeSchema5to6,
upgradeSchema6to7,
upgradeSchema7to8,
upgradeSchema8to9,
upgradeSchema9to10,
upgradeSchema10to11,
upgradeSchema11to12,
upgradeSchema12to13,
upgradeSchema13to14,
upgradeSchema14to15,
upgradeSchema15to16,
upgradeSchema16to17,
upgradeSchema17to18,
upgradeSchema18to19,
upgradeSchema19to20,
upgradeSchema20to21,
upgradeSchema21to22,
upgradeSchema22to23,
upgradeSchema23to24,
upgradeSchema24to25,
upgradeSchema25to26,
}
n := 0
for i, u := range upgrades {
if i >= oldVersion {
err = u(diskConf)
if err != nil {
return err
}
n++
}
}
if n == 0 {
return fmt.Errorf("unknown configuration schema version %d", oldVersion)
}
return nil
}

168
internal/home/upgrade.go → internal/confmigrate/upgrade.go
View file

@ -1,7 +1,6 @@
package home
package confmigrate
import (
"bytes"
"fmt"
"net/netip"
"net/url"
@ -17,133 +16,15 @@ import (
"github.com/AdguardTeam/golibs/log"
"github.com/AdguardTeam/golibs/netutil"
"github.com/AdguardTeam/golibs/timeutil"
"github.com/google/renameio/v2/maybe"
"golang.org/x/crypto/bcrypt"
yaml "gopkg.in/yaml.v3"
)
// currentSchemaVersion is the current schema version.
const currentSchemaVersion = 26
// These aliases are provided for convenience.
type (
yarr = []any
yobj = map[string]any
)
// Performs necessary upgrade operations if needed
func upgradeConfig() error {
// read a config file into an interface map, so we can manipulate values without losing any
diskConf := yobj{}
body, err := readConfigFile()
if err != nil {
return err
}
err = yaml.Unmarshal(body, &diskConf)
if err != nil {
log.Printf("parsing config file for upgrade: %s", err)
return err
}
schemaVersionInterface, ok := diskConf["schema_version"]
log.Tracef("got schema version %v", schemaVersionInterface)
if !ok {
// no schema version, set it to 0
schemaVersionInterface = 0
}
schemaVersion, ok := schemaVersionInterface.(int)
if !ok {
err = fmt.Errorf("configuration file contains non-integer schema_version, abort")
log.Println(err)
return err
}
if schemaVersion == currentSchemaVersion {
// do nothing
return nil
}
return upgradeConfigSchema(schemaVersion, diskConf)
}
// upgradeFunc is a function that upgrades a config and returns an error.
type upgradeFunc = func(diskConf yobj) (err error)
// Upgrade from oldVersion to newVersion
func upgradeConfigSchema(oldVersion int, diskConf yobj) (err error) {
upgrades := []upgradeFunc{
upgradeSchema0to1,
upgradeSchema1to2,
upgradeSchema2to3,
upgradeSchema3to4,
upgradeSchema4to5,
upgradeSchema5to6,
upgradeSchema6to7,
upgradeSchema7to8,
upgradeSchema8to9,
upgradeSchema9to10,
upgradeSchema10to11,
upgradeSchema11to12,
upgradeSchema12to13,
upgradeSchema13to14,
upgradeSchema14to15,
upgradeSchema15to16,
upgradeSchema16to17,
upgradeSchema17to18,
upgradeSchema18to19,
upgradeSchema19to20,
upgradeSchema20to21,
upgradeSchema21to22,
upgradeSchema22to23,
upgradeSchema23to24,
upgradeSchema24to25,
upgradeSchema25to26,
}
n := 0
for i, u := range upgrades {
if i >= oldVersion {
err = u(diskConf)
if err != nil {
return err
}
n++
}
}
if n == 0 {
return fmt.Errorf("unknown configuration schema version %d", oldVersion)
}
buf := &bytes.Buffer{}
enc := yaml.NewEncoder(buf)
enc.SetIndent(2)
err = enc.Encode(diskConf)
if err != nil {
return fmt.Errorf("generating new config: %w", err)
}
config.fileData = buf.Bytes()
confFile := config.getConfigFilename()
err = maybe.WriteFile(confFile, config.fileData, 0o644)
if err != nil {
return fmt.Errorf("writing new config: %w", err)
}
return nil
}
// The first schema upgrade:
// No more "dnsfilter.txt", filters are now kept in data/filters/
func upgradeSchema0to1(diskConf yobj) (err error) {
// upgradeSchema0to1 deletes the unused dnsfilter.txt file, since the following
// versions store filters in data/filters/.
func (m *Migrator) upgradeSchema0to1(diskConf yobj) (err error) {
log.Printf("%s(): called", funcName())
dnsFilterPath := filepath.Join(Context.workDir, "dnsfilter.txt")
dnsFilterPath := filepath.Join(m.workingDir, "dnsfilter.txt")
log.Printf("deleting %s as we don't need it anymore", dnsFilterPath)
err = os.Remove(dnsFilterPath)
if err != nil && !errors.Is(err, os.ErrNotExist) {
@ -157,13 +38,20 @@ func upgradeSchema0to1(diskConf yobj) (err error) {
return nil
}
// Second schema upgrade:
// coredns is now dns in config
// delete 'Corefile', since we don't use that anymore
func upgradeSchema1to2(diskConf yobj) (err error) {
// upgradeSchema1to2 performs the following changes:
//
// # BEFORE:
// 'dns':
// # …
//
// # AFTER:
// # …
//
// It also deletes the Corefile file, since it isn't used anymore.
func (m *Migrator) upgradeSchema1to2(diskConf yobj) (err error) {
log.Printf("%s(): called", funcName())
coreFilePath := filepath.Join(Context.workDir, "Corefile")
coreFilePath := filepath.Join(m.workingDir, "Corefile")
log.Printf("deleting %s as we don't need it anymore", coreFilePath)
err = os.Remove(coreFilePath)
if err != nil && !errors.Is(err, os.ErrNotExist) {
@ -292,12 +180,12 @@ func upgradeSchema4to5(diskConf yobj) error {
log.Fatalf("Can't use password \"%s\": bcrypt.GenerateFromPassword: %s", passStr, err)
return nil
}
u := webUser{
Name: nameStr,
PasswordHash: string(hash),
u := yobj{
"name": nameStr,
"password": string(hash),
}
users := []webUser{u}
diskConf["users"] = users
diskConf["users"] = yarr{u}
return nil
}
@ -794,12 +682,12 @@ func upgradeSchema13to14(diskConf yobj) (err error) {
diskConf["clients"] = yobj{
"persistent": clientsVal,
"runtime_sources": &clientSourcesConfig{
WHOIS: true,
ARP: true,
RDNS: rdnsSrc,
DHCP: true,
HostsFile: true,
"runtime_sources": yobj{
"whois": true,
"arp": true,
"rdns": rdnsSrc,
"dhcp": true,
"hosts": true,
},
}

62
internal/home/upgrade_test.go → internal/confmigrate/upgrade_test.go
View file

@ -1,4 +1,4 @@
package home
package confmigrate
import (
"testing"
@ -11,12 +11,16 @@ import (
"github.com/stretchr/testify/require"
)
// TODO(a.garipov): Cover all migrations, use a testdata/ dir.
// TODO(e.burkov): Cover all migrations, use a testdata/ dir.
func TestUpgradeSchema1to2(t *testing.T) {
diskConf := testDiskConf(1)
err := upgradeSchema1to2(diskConf)
m := New(&Config{
WorkingDir: "",
})
err := m.upgradeSchema1to2(diskConf)
require.NoError(t, err)
require.Equal(t, diskConf["schema_version"], 2)
@ -651,10 +655,10 @@ func TestUpgradeSchema12to13(t *testing.T) {
func TestUpgradeSchema13to14(t *testing.T) {
const newSchemaVer = 14
testClient := &clientObject{
Name: "agh-client",
IDs: []string{"id1"},
UseGlobalSettings: true,
testClient := yobj{
"name": "agh-client",
"ids": []string{"id1"},
"use_global_settings": true,
}
testCases := []struct {
@ -668,37 +672,37 @@ func TestUpgradeSchema13to14(t *testing.T) {
// The clients field will be added anyway.
"clients": yobj{
"persistent": yarr{},
"runtime_sources": &clientSourcesConfig{
WHOIS: true,
ARP: true,
RDNS: false,
DHCP: true,
HostsFile: true,
"runtime_sources": yobj{
"whois": true,
"arp": true,
"rdns": false,
"dhcp": true,
"hosts": true,
},
},
},
name: "no_clients",
}, {
in: yobj{
"clients": []*clientObject{testClient},
"clients": yarr{testClient},
},
want: yobj{
"schema_version": newSchemaVer,
"clients": yobj{
"persistent": []*clientObject{testClient},
"runtime_sources": &clientSourcesConfig{
WHOIS: true,
ARP: true,
RDNS: false,
DHCP: true,
HostsFile: true,
"persistent": yarr{testClient},
"runtime_sources": yobj{
"whois": true,
"arp": true,
"rdns": false,
"dhcp": true,
"hosts": true,
},
},
},
name: "no_dns",
}, {
in: yobj{
"clients": []*clientObject{testClient},
"clients": yarr{testClient},
"dns": yobj{
"resolve_clients": true,
},
@ -706,13 +710,13 @@ func TestUpgradeSchema13to14(t *testing.T) {
want: yobj{
"schema_version": newSchemaVer,
"clients": yobj{
"persistent": []*clientObject{testClient},
"runtime_sources": &clientSourcesConfig{
WHOIS: true,
ARP: true,
RDNS: true,
DHCP: true,
HostsFile: true,
"persistent": yarr{testClient},
"runtime_sources": yobj{
"whois": true,
"arp": true,
"rdns": true,
"dhcp": true,
"hosts": true,
},
},
"dns": yobj{},

58
internal/home/config.go
View file

@ -10,6 +10,7 @@ import (
"github.com/AdguardTeam/AdGuardHome/internal/aghalg"
"github.com/AdguardTeam/AdGuardHome/internal/aghtls"
"github.com/AdguardTeam/AdGuardHome/internal/confmigrate"
"github.com/AdguardTeam/AdGuardHome/internal/dhcpd"
"github.com/AdguardTeam/AdGuardHome/internal/dnsforward"
"github.com/AdguardTeam/AdGuardHome/internal/filtering"
@ -415,7 +416,7 @@ var config = &configuration{
MaxAge: 3,
},
OSConfig: &osConfig{},
SchemaVersion: currentSchemaVersion,
SchemaVersion: confmigrate.CurrentSchemaVersion,
Theme: ThemeAuto,
}
@ -431,6 +432,7 @@ func (c *configuration) getConfigFilename() string {
if !filepath.IsAbs(configFile) {
configFile = filepath.Join(Context.workDir, configFile)
}
return configFile
}
@ -450,21 +452,56 @@ func validateBindHosts(conf *configuration) (err error) {
return nil
}
// parseConfig loads configuration from the YAML file
// parseConfig loads configuration from the YAML file, upgrading it if
// necessary.
func parseConfig() (err error) {
var fileData []byte
fileData, err = readConfigFile()
// Do the upgrade if necessary.
config.fileData, err = readConfigFile()
if err != nil {
return err
}
config.fileData = nil
err = yaml.Unmarshal(fileData, &config)
migrator := confmigrate.New(&confmigrate.Config{
WorkingDir: Context.workDir,
})
var upgraded bool
config.fileData, upgraded, err = migrator.Migrate(config.fileData)
if err != nil {
// Don't wrap the error, because it's informative enough as is.
return err
} else if upgraded {
err = maybe.WriteFile(config.getConfigFilename(), config.fileData, 0o644)
if err != nil {
return fmt.Errorf("writing new config: %w", err)
}
}
err = yaml.Unmarshal(config.fileData, &config)
if err != nil {
// Don't wrap the error since it's informative enough as is.
return err
}
err = validateConfig()
if err != nil {
return err
}
if config.DNS.UpstreamTimeout.Duration == 0 {
config.DNS.UpstreamTimeout = timeutil.Duration{Duration: dnsforward.DefaultTimeout}
}
err = setContextTLSCipherIDs()
if err != nil {
return err
}
return nil
}
// validateConfig returns error if the configuration is invalid.
func validateConfig() (err error) {
err = validateBindHosts(config)
if err != nil {
// Don't wrap the error since it's informative enough as is.
@ -500,15 +537,6 @@ func parseConfig() (err error) {
config.Filtering.FiltersUpdateIntervalHours = 24
}
if config.DNS.UpstreamTimeout.Duration == 0 {
config.DNS.UpstreamTimeout = timeutil.Duration{Duration: dnsforward.DefaultTimeout}
}
err = setContextTLSCipherIDs()
if err != nil {
return err
}
return nil
}

8
internal/home/home.go
View file

@ -145,14 +145,8 @@ func setupContext(opts options) (err error) {
return nil
}
// Do the upgrade if necessary.
err = upgradeConfig()
err = parseConfig()
if err != nil {
// Don't wrap the error, because it's informative enough as is.
return err
}
if err = parseConfig(); err != nil {
log.Error("parsing configuration file: %s", err)
os.Exit(1)

2
scripts/make/go-lint.sh
View file

@ -177,6 +177,7 @@ run_linter gocyclo --over 10 .
gocognit_paths="\
./internal/aghnet/ 20
./internal/querylog/ 20
./internal/confmigrate/ 19
./internal/dnsforward/ 19
./internal/home/ 19
./internal/aghtls/ 18
@ -240,6 +241,7 @@ run_linter gosec --quiet\
./internal/aghrenameio/\
./internal/aghtest\
./internal/client\
./internal/confmigrate\
./internal/dhcpd\
./internal/dhcpsvc\
./internal/dnsforward\