kubernetes/pkg/kubelet/network/dns/dns.go

var defaultDNSOptions …

type podDNSType …

const podDNSCluster …

const podDNSHost …

const podDNSNone …

const maxResolvConfLength …

type Configurer …

// NewConfigurer returns a DNS configurer for launching pods.
func NewConfigurer(recorder record.EventRecorder, nodeRef *v1.ObjectReference, nodeIPs []net.IP, clusterDNS []net.IP, clusterDomain, resolverConfig string) *Configurer { … }

func omitDuplicates(strs []string) []string { … }

func (c *Configurer) formDNSSearchFitsLimits(composedSearch []string, pod *v1.Pod) []string { … }

func (c *Configurer) formDNSNameserversFitsLimits(nameservers []string, pod *v1.Pod) []string { … }

func (c *Configurer) formDNSConfigFitsLimits(dnsConfig *runtimeapi.DNSConfig, pod *v1.Pod) *runtimeapi.DNSConfig { … }

func (c *Configurer) generateSearchesForDNSClusterFirst(hostSearch []string, pod *v1.Pod) []string { … }

// CheckLimitsForResolvConf checks limits in resolv.conf.
func (c *Configurer) CheckLimitsForResolvConf() { … }

// parseResolvConf reads a resolv.conf file from the given reader, and parses
// it into nameservers, searches and options, possibly returning an error.
func parseResolvConf(reader io.Reader) (nameservers []string, searches []string, options []string, err error) { … }

// Reads a resolv.conf-like file and returns the DNS config options from it.
// Returns an empty DNSConfig if the given resolverConfigFile is an empty string.
func getDNSConfig(resolverConfigFile string) (*runtimeapi.DNSConfig, error) { … }

func getPodDNSType(pod *v1.Pod) (podDNSType, error) { … }

// mergeDNSOptions merges DNS options. If duplicated, entries given by PodDNSConfigOption will
// overwrite the existing ones.
func mergeDNSOptions(existingDNSConfigOptions []string, dnsConfigOptions []v1.PodDNSConfigOption) []string { … }

// appendOptions appends options to the given list, but does not add duplicates.
// append option will overwrite the previous one either in new line or in the same line.
func appendOptions(options []string, newOption ...string) []string { … }

// appendDNSConfig appends DNS servers, search paths and options given by
// PodDNSConfig to the existing DNS config. Duplicated entries will be merged.
// This assumes existingDNSConfig and dnsConfig are not nil.
func appendDNSConfig(existingDNSConfig *runtimeapi.DNSConfig, dnsConfig *v1.PodDNSConfig) *runtimeapi.DNSConfig { … }

// GetPodDNS returns DNS settings for the pod.
func (c *Configurer) GetPodDNS(pod *v1.Pod) (*runtimeapi.DNSConfig, error) { … }

// SetupDNSinContainerizedMounter replaces the nameserver in containerized-mounter's rootfs/etc/resolv.conf with kubelet.ClusterDNS
func (c *Configurer) SetupDNSinContainerizedMounter(mounterPath string) { … }