Network: default egress policy Allow for Isolated networks on fresh installations

The built-in Isolated network offerings were seeded with
egress_default_policy = false (Deny), while:

- the createNetworkOffering API already defaults egressdefaultpolicy to true
  (Allow) when the parameter is omitted (NetworkOfferingBaseCmd),
- the UI's Add Network Offering form contradicted that API default by
  preselecting Deny and sending an explicit egressdefaultpolicy=false,
- the Kubernetes service rejects isolated offerings with egress Deny and
  creates its own default offering with egress Allow,
- VPC tiers have no such baked-in Deny: allow-all (default_allow ACL) is a
  first-class choice.

Seed both built-in Isolated offerings with egress Allow on fresh
installations, and align the UI form default with the existing API default.
For DefaultIsolatedNetworkOffering (no Firewall service) the flag is inert
and set only so API responses do not advertise a misleading Deny policy.
No global setting is introduced: per-offering configurability already exists
via the egressdefaultpolicy parameter, and a setting consumed once at
first-boot seeding but live for later createNetworkOffering calls would have
inconsistent lifecycle semantics.

Backward compatibility: createDefaultNetworkOfferings() only runs on first
boot (guarded by the 'init' configuration flag) and
persistDefaultNetworkOffering() is find-or-create by unique name - it never
updates an existing row. No upgrade SQL is shipped, deliberately: egress
enforcement reads the offering row live on every VR rule programming, so
flipping existing rows would change the behavior of existing networks.
Upgraded clouds keep Deny on the pre-existing built-in offering; an
Allow-by-default offering for new networks on upgraded clouds is left as a
follow-up (new/versioned offering).

Unit tests cover the fresh-install seeding values and the API default for
omitted/explicit egressdefaultpolicy.

Author: andrijapanicsb

api/src/test/java/org/apache/cloudstack/api/command/admin/network/CreateNetworkOfferingCmdTest.java

@@ -0,0 +1,50 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+package org.apache.cloudstack.api.command.admin.network;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.junit.MockitoJUnitRunner;
+import org.springframework.test.util.ReflectionTestUtils;
+
+import static org.junit.Assert.assertEquals;
+
+@RunWith(MockitoJUnitRunner.class)
+public class CreateNetworkOfferingCmdTest {
+
+    @Test
+    public void testEgressDefaultPolicyIsAllowWhenParameterOmitted() {
+        CreateNetworkOfferingCmd cmd = new CreateNetworkOfferingCmd();
+        assertEquals("createNetworkOffering must default to egress Allow when egressdefaultpolicy is not specified",
+                Boolean.TRUE, cmd.getEgressDefaultPolicy());
+    }
+
+    @Test
+    public void testEgressDefaultPolicyExplicitDenyIsHonored() {
+        CreateNetworkOfferingCmd cmd = new CreateNetworkOfferingCmd();
+        ReflectionTestUtils.setField(cmd, "egressDefaultPolicy", Boolean.FALSE);
+        assertEquals(Boolean.FALSE, cmd.getEgressDefaultPolicy());
+    }
+
+    @Test
+    public void testEgressDefaultPolicyExplicitAllowIsHonored() {
+        CreateNetworkOfferingCmd cmd = new CreateNetworkOfferingCmd();
+        ReflectionTestUtils.setField(cmd, "egressDefaultPolicy", Boolean.TRUE);
+        assertEquals(Boolean.TRUE, cmd.getEgressDefaultPolicy());
+    }
+}

engine/schema/src/main/java/com/cloud/offerings/NetworkOfferingVO.java

@@ -346,6 +346,10 @@ public boolean isEgressDefaultPolicy() {
         return egressdefaultpolicy;
     }
 
+    public void setEgressDefaultPolicy(boolean egressDefaultPolicy) {
+        this.egressdefaultpolicy = egressDefaultPolicy;
+    }
+
     public NetworkOfferingVO(String name, String displayText, TrafficType trafficType, boolean systemOnly, boolean specifyVlan, Integer rateMbps,
             Integer multicastRateMbps, boolean isDefault, Availability availability, String tags, Network.GuestType guestType, boolean conserveMode,
             boolean specifyIpRanges, boolean isPersistent, boolean internalLb, boolean publicLb, boolean isForVpc) {

server/src/main/java/com/cloud/server/ConfigurationServerImpl.java

@@ -1067,6 +1067,12 @@ public void doInTransactionWithoutResult(TransactionStatus status) {
                                 Network.GuestType.Isolated, true, false, false, false, true, false);
 
                 defaultIsolatedSourceNatEnabledNetworkOffering.setState(NetworkOffering.State.Enabled);
+                // Default egress policy is Allow on fresh installations, consistent with the
+                // createNetworkOffering API default (egressdefaultpolicy=true when not specified).
+                // Existing installations are not affected: this method only runs on first boot
+                // (guarded by the "init" configuration flag) and persistDefaultNetworkOffering()
+                // never updates an already existing offering.
+                defaultIsolatedSourceNatEnabledNetworkOffering.setEgressDefaultPolicy(true);
                 defaultIsolatedSourceNatEnabledNetworkOffering.setSupportsVmAutoScaling(true);
                 defaultIsolatedSourceNatEnabledNetworkOffering = _networkOfferingDao.persistDefaultNetworkOffering(defaultIsolatedSourceNatEnabledNetworkOffering);
 
@@ -1084,6 +1090,9 @@ public void doInTransactionWithoutResult(TransactionStatus status) {
                                 false, true, null, null, true, Availability.Optional, null, Network.GuestType.Isolated, true, true, false, false, false, false);
 
                 defaultIsolatedEnabledNetworkOffering.setState(NetworkOffering.State.Enabled);
+                // This offering carries no Firewall service, so the flag is not enforced anywhere;
+                // it is set for consistency so API responses do not advertise a misleading Deny policy.
+                defaultIsolatedEnabledNetworkOffering.setEgressDefaultPolicy(true);
                 defaultIsolatedEnabledNetworkOffering = _networkOfferingDao.persistDefaultNetworkOffering(defaultIsolatedEnabledNetworkOffering);
 
                 for (Service service : defaultIsolatedNetworkOfferingProviders.keySet()) {

server/src/test/java/com/cloud/server/ConfigurationServerImplTest.java

@@ -23,6 +23,8 @@
 import com.cloud.dc.dao.VlanDao;
 import com.cloud.domain.dao.DomainDao;
 import com.cloud.network.dao.NetworkDao;
+import com.cloud.offering.NetworkOffering;
+import com.cloud.offerings.NetworkOfferingVO;
 import com.cloud.offerings.dao.NetworkOfferingDao;
 import com.cloud.offerings.dao.NetworkOfferingServiceMapDao;
 import com.cloud.service.dao.ServiceOfferingDao;
@@ -35,12 +37,16 @@
 import org.junit.Assert;
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
 import org.mockito.InjectMocks;
 import org.mockito.Mock;
 import org.mockito.Mockito;
 import org.mockito.Spy;
 import org.mockito.junit.MockitoJUnitRunner;
 
+import java.util.HashMap;
+import java.util.Map;
+
 @RunWith(MockitoJUnitRunner.class)
 public class ConfigurationServerImplTest {
 
@@ -122,4 +128,37 @@ public void testUpdateSystemvmPassword() {
         //teardown
         System.setProperty("user.name", realusername);
     }
+
+    @Test
+    public void testCreateDefaultNetworkOfferingsSeedsIsolatedOfferingsWithEgressAllow() {
+        Mockito.when(_networkOfferingDao.persistDefaultNetworkOffering(Mockito.any(NetworkOfferingVO.class)))
+                .thenAnswer(invocation -> invocation.getArgument(0));
+
+        try (TransactionLegacy txn = TransactionLegacy.open("testCreateDefaultNetworkOfferings")) {
+            configurationServer.createDefaultNetworkOfferings();
+        }
+
+        ArgumentCaptor<NetworkOfferingVO> captor = ArgumentCaptor.forClass(NetworkOfferingVO.class);
+        Mockito.verify(_networkOfferingDao, Mockito.atLeastOnce()).persistDefaultNetworkOffering(captor.capture());
+
+        Map<String, NetworkOfferingVO> offeringsByName = new HashMap<>();
+        for (NetworkOfferingVO offering : captor.getAllValues()) {
+            offeringsByName.putIfAbsent(offering.getUniqueName(), offering);
+        }
+
+        NetworkOfferingVO isolatedSourceNatOffering = offeringsByName.get(NetworkOffering.DefaultIsolatedNetworkOfferingWithSourceNatService);
+        Assert.assertNotNull(isolatedSourceNatOffering);
+        Assert.assertTrue("Built-in Isolated source-NAT offering must be seeded with egress default policy Allow on fresh installations",
+                isolatedSourceNatOffering.isEgressDefaultPolicy());
+
+        NetworkOfferingVO isolatedOffering = offeringsByName.get(NetworkOffering.DefaultIsolatedNetworkOffering);
+        Assert.assertNotNull(isolatedOffering);
+        Assert.assertTrue("Built-in Isolated (no source-NAT) offering must be seeded with egress default policy Allow on fresh installations",
+                isolatedOffering.isEgressDefaultPolicy());
+
+        NetworkOfferingVO sharedOffering = offeringsByName.get(NetworkOffering.DefaultSharedNetworkOffering);
+        Assert.assertNotNull(sharedOffering);
+        Assert.assertFalse("Built-in Shared offering seeding must remain unchanged",
+                sharedOffering.isEgressDefaultPolicy());
+    }
 }

ui/src/views/offering/AddNetworkOffering.vue

@@ -704,7 +704,7 @@ export default {
         isolation: 'dedicated',
         conservemode: true,
         availability: 'optional',
-        egressdefaultpolicy: 'deny',
+        egressdefaultpolicy: 'allow',
         ispublic: this.isPublic,
         nsxsupportlb: true,
         routingmode: 'static'