- Images for cloud-controller-manager, kube-apiserver, kube-controller-manager, and kube-scheduler now contain a minimal /etc/nsswitch.conf and should respect /etc/hosts for lookups ([#69238](https://github.com/kubernetes/kubernetes/pull/69238), [@BenTheElder](https://github.com/BenTheElder))

### SIG Scheduling

            case NtStatus.NT_STATUS_OBJECT_NAME_NOT_FOUND:
            case NtStatus.NT_STATUS_OBJECT_PATH_NOT_FOUND:
                // Cache negative results to avoid repeated failed lookups
                this.attrExpiration = currentTime + getContext().getConfig().getAttributeCacheTimeout();
                return false;
            default:
                throw se;
            }

- Changed Job controller to use the controller UID index for Pod lookups to improve performance. ([#132305](https://github.com/kubernetes/kubernetes/pull/132305), [@xigang](https://github.com/xigang))

    /**
     * Returns true if this reference contains an active value, meaning one that is still considered
     * present in the cache. Active values consist of live values, which are returned by cache
     * lookups, and dead values, which have been evicted but awaiting removal. Non-active values
     * consist strictly of loading values, though during refresh a value may be both active and
     * loading.
     */
    boolean isActive();

- Hostnames are now converted to lowercase before being used for node lookups in the kubernetes-worker charm. ([#65487](https://github.com/kubernetes/kubernetes/pull/65487), [@dshcherb](https://github.com/dshcherb))

    /**
     * Returns true if this reference contains an active value, meaning one that is still considered
     * present in the cache. Active values consist of live values, which are returned by cache
     * lookups, and dead values, which have been evicted but awaiting removal. Non-active values
     * consist strictly of loading values, though during refresh a value may be both active and
     * loading.
     */
    boolean isActive();

public interface Lookup extends Service {
    /**
     * Performs a lookup for given typed component.
     *
     * @param type The component type.
     * @return The component.
     * @param <T> The component type.
     * @throws LookupException if no such component or there is some provisioning related issue.
     */
    @Nonnull
    <T> T lookup(Class<T> type);

    /**

	}
	defer conn.Close()

	// Bind to the lookup user account
	if err = l.LDAP.LookupBind(conn); err != nil {
		return nil, nil, err
	}

	// Lookup user DN
	lookupRes, err := l.LDAP.LookupUsername(conn, username)
	if err != nil {
		errRet := fmt.Errorf("Unable to find user DN: %w", err)
		return nil, nil, errRet
	}

	groups, err := l.LDAP.SearchForUserGroups(conn, username, lookupRes.ActualDN)
	if err != nil {

pkg net, method (*Resolver) LookupIPAddr(context.Context, string) ([]IPAddr, error)
pkg net, method (*Resolver) LookupMX(context.Context, string) ([]*MX, error)
pkg net, method (*Resolver) LookupNS(context.Context, string) ([]*NS, error)
pkg net, method (*Resolver) LookupPort(context.Context, string, string) (int, error)
pkg net, method (*Resolver) LookupSRV(context.Context, string, string, string) (string, []*SRV, error)

	for _, kv := range kvs {
		if kv.Key == key {
			return kv, true
		}
	}
	return KV{}, false
}

// Lookup - lookup a key in a list of KVS
func (kvs KVS) Lookup(key string) (string, bool) {
	for _, kv := range kvs {
		if kv.Key == key {
			return kv.Value, true
		}
	}
	return "", false
}

// Config - MinIO server config structure.
type Config map[string]map[string]KVS