DNS_UPDATE_PERIOD environment variable

internal/params/dns.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"net"
 	"strings"
+	"time"
 
 	libparams "github.com/qdm12/golibs/params"
 	"github.com/qdm12/private-internet-access-docker/internal/constants"
@@ -132,3 +133,9 @@ func (p *reader) GetDNSOverTLSPrivateAddresses() (privateAddresses []string, err
 func (p *reader) GetDNSOverTLSIPv6() (ipv6 bool, err error) {
 	return p.envParams.GetOnOff("DOT_IPV6", libparams.Default("off"))
 }
+
+// GetDNSUpdatePeriod obtains the period to use to update the block lists and cryptographic files
+// and restart Unbound from the environment variable DNS_UPDATE_PERIOD
+func (p *reader) GetDNSUpdatePeriod() (period time.Duration, err error) {
+	return p.envParams.GetDuration("DNS_UPDATE_PERIOD", libparams.Default("24h"))
+}

internal/params/params.go

@@ -3,6 +3,7 @@ package params
 import (
 	"net"
 	"os"
+	"time"
 
 	"github.com/qdm12/golibs/logging"
 	libparams "github.com/qdm12/golibs/params"
@@ -27,6 +28,7 @@ type Reader interface {
 	GetDNSUnblockedHostnames() (hostnames []string, err error)
 	GetDNSOverTLSPrivateAddresses() (privateAddresses []string, err error)
 	GetDNSOverTLSIPv6() (ipv6 bool, err error)
+	GetDNSUpdatePeriod() (period time.Duration, err error)
 
 	// System
 	GetUID() (uid int, err error)

internal/settings/dns.go

@@ -3,6 +3,7 @@ package settings
 import (
 	"fmt"
 	"strings"
+	"time"
 
 	"github.com/qdm12/private-internet-access-docker/internal/constants"
 	"github.com/qdm12/private-internet-access-docker/internal/models"
@@ -23,6 +24,7 @@ type DNS struct {
 	VerbosityDetailsLevel uint8
 	ValidationLogLevel    uint8
 	IPv6                  bool
+	UpdatePeriod          time.Duration
 }
 
 func (d *DNS) String() string {
@@ -66,6 +68,7 @@ func (d *DNS) String() string {
 		"Verbosity details level: " + fmt.Sprintf("%d/4", d.VerbosityDetailsLevel),
 		"Validation log level: " + fmt.Sprintf("%d/2", d.ValidationLogLevel),
 		"IPv6 resolution: " + ipv6,
+		"Update period: " + d.UpdatePeriod.String(),
 	}
 	return strings.Join(settingsList, "\n |--")
 }
@@ -120,6 +123,10 @@ func GetDNSSettings(paramsReader params.Reader) (settings DNS, err error) {
 	if err != nil {
 		return settings, err
 	}
+	settings.UpdatePeriod, err = paramsReader.GetDNSUpdatePeriod()
+	if err != nil {
+		return settings, err
+	}
 
 	// Consistency check
 	IPv6Support := false