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DNS caching (#1728)

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* Allow configuring DNS cache

* Update sample configs

* Fix build errors

* Fix time resolution

* Default 5m

* In seconds

* Use WithDNScache

* Correct field name

* Update go.mod/go.sum to matrix-org/gomatrixserverlib#251
This commit is contained in:
Neil Alexander 2021-01-22 14:16:59 +00:00 • committed by GitHub
parent 745ee20b90
commit 805a74892e
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6 changed files with 76 additions and 5 deletions
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25
setup/config/config_global.go
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@ -48,6 +48,9 @@ type Global struct {
// Metrics configuration
Metrics Metrics `yaml:"metrics"`
// DNS caching options for all outbound HTTP requests
DNSCache DNSCacheOptions `yaml:"dns_cache"`
}
func (c *Global) Defaults() {
@ -59,6 +62,7 @@ func (c *Global) Defaults() {
c.Kafka.Defaults()
c.Metrics.Defaults()
c.DNSCache.Defaults()
}
func (c *Global) Verify(configErrs *ConfigErrors, isMonolith bool) {
@ -67,6 +71,7 @@ func (c *Global) Verify(configErrs *ConfigErrors, isMonolith bool) {
c.Kafka.Verify(configErrs, isMonolith)
c.Metrics.Verify(configErrs, isMonolith)
c.DNSCache.Verify(configErrs, isMonolith)
}
type OldVerifyKeys struct {
@ -140,3 +145,23 @@ func (c DatabaseOptions) MaxOpenConns() int {
func (c DatabaseOptions) ConnMaxLifetime() time.Duration {
return time.Duration(c.ConnMaxLifetimeSeconds) * time.Second
}
type DNSCacheOptions struct {
// Whether the DNS cache is enabled or not
Enabled bool `yaml:"enabled"`
// How many entries to store in the DNS cache at a given time
CacheSize int `yaml:"cache_size"`
// How long a cache entry should be considered valid for
CacheLifetime time.Duration `yaml:"cache_lifetime"`
}
func (c *DNSCacheOptions) Defaults() {
c.Enabled = false
c.CacheSize = 256
c.CacheLifetime = time.Minute * 5
}
func (c *DNSCacheOptions) Verify(configErrs *ConfigErrors, isMonolith bool) {
checkPositive(configErrs, "cache_size", int64(c.CacheSize))
checkPositive(configErrs, "cache_lifetime", int64(c.CacheLifetime))
}