Cleanup network option parsing

We were not handling the parsing of --ip.  This pr adds validation
checks and now will support the flag.

Move validation to the actual parsing of the network flags.

We should only parse the dns flags if the user changed them. We don't
want to pass default options if set in containers.conf to the server.
Potential for duplicating defaults.

Add support for --dns-opt flag passing

Begin handling of --network flag, although we don't have a way right now
to translate a string into a specgen.Namespace.

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

3 files changed, 17 insertions, 18 deletions

diff --git a/pkg/specgen/container_validate.go b/pkg/specgen/container_validate.go
index 9152e7ee7..c24869784 100644
--- a/pkg/specgen/container_validate.go
+++ b/pkg/specgen/container_validate.go
@@ -91,13 +91,13 @@ func (s *SpecGenerator) Validate() error {
 	}
 	// useimageresolveconf conflicts with dnsserver, dnssearch, dnsoption
 	if s.UseImageResolvConf {
-		if len(s.DNSServer) > 0 {
+		if len(s.DNSServers) > 0 {
 			return exclusiveOptions("UseImageResolvConf", "DNSServer")
 		}
 		if len(s.DNSSearch) > 0 {
 			return exclusiveOptions("UseImageResolvConf", "DNSSearch")
 		}
-		if len(s.DNSOption) > 0 {
+		if len(s.DNSOptions) > 0 {
 			return exclusiveOptions("UseImageResolvConf", "DNSOption")
 		}
 	}
diff --git a/pkg/specgen/generate/namespaces.go b/pkg/specgen/generate/namespaces.go
index cdd7d86da..32cecfc97 100644
--- a/pkg/specgen/generate/namespaces.go
+++ b/pkg/specgen/generate/namespaces.go
@@ -147,20 +147,19 @@ func GenerateNamespaceContainerOpts(s *specgen.SpecGenerator, rt *libpod.Runtime
 	if len(s.DNSSearch) > 0 {
 		options = append(options, libpod.WithDNSSearch(s.DNSSearch))
 	}
-	if len(s.DNSServer) > 0 {
-		// TODO I'm not sure how we are going to handle this given the input
-		if len(s.DNSServer) == 1 { //&& strings.ToLower(s.DNSServer[0].) == "none" {
-			options = append(options, libpod.WithUseImageResolvConf())
-		} else {
-			var dnsServers []string
-			for _, d := range s.DNSServer {
-				dnsServers = append(dnsServers, d.String())
-			}
-			options = append(options, libpod.WithDNS(dnsServers))
+
+	if s.UseImageResolvConf {
+		options = append(options, libpod.WithUseImageResolvConf())
+	} else {
+		var dnsServers []string
+		for _, d := range s.DNSServers {
+			dnsServers = append(dnsServers, d.String())
 		}
+		options = append(options, libpod.WithDNS(dnsServers))
 	}
-	if len(s.DNSOption) > 0 {
-		options = append(options, libpod.WithDNSOption(s.DNSOption))
+
+	if len(s.DNSOptions) > 0 {
+		options = append(options, libpod.WithDNSOption(s.DNSOptions))
 	}
 	if s.StaticIP != nil {
 		options = append(options, libpod.WithStaticIP(*s.StaticIP))
diff --git a/pkg/specgen/specgen.go b/pkg/specgen/specgen.go
index 1a05733f9..0b568dd5c 100644
--- a/pkg/specgen/specgen.go
+++ b/pkg/specgen/specgen.go
@@ -319,24 +319,24 @@ type ContainerNetworkConfig struct {
 	// by Podman, but instead sourced from the image.
 	// Conflicts with DNSServer, DNSSearch, DNSOption.
 	UseImageResolvConf bool `json:"use_image_resolve_conf,omitempty"`
-	// DNSServer is a set of DNS servers that will be used in the
+	// DNSServers is a set of DNS servers that will be used in the
 	// container's resolv.conf, replacing the host's DNS Servers which are
 	// used by default.
 	// Conflicts with UseImageResolvConf.
 	// Optional.
-	DNSServer []net.IP `json:"dns_server,omitempty"`
+	DNSServers []net.IP `json:"dns_server,omitempty"`
 	// DNSSearch is a set of DNS search domains that will be used in the
 	// container's resolv.conf, replacing the host's DNS search domains
 	// which are used by default.
 	// Conflicts with UseImageResolvConf.
 	// Optional.
 	DNSSearch []string `json:"dns_search,omitempty"`
-	// DNSOption is a set of DNS options that will be used in the
+	// DNSOptions is a set of DNS options that will be used in the
 	// container's resolv.conf, replacing the host's DNS options which are
 	// used by default.
 	// Conflicts with UseImageResolvConf.
 	// Optional.
-	DNSOption []string `json:"dns_option,omitempty"`
+	DNSOptions []string `json:"dns_option,omitempty"`
 	// UseImageHosts indicates that /etc/hosts should not be managed by
 	// Podman, and instead sourced from the image.
 	// Conflicts with HostAdd.