Refs #20652. Write hosts file on reusable-sanitizers-ci.

Signed-off-by: Miguel Company <[email protected]>

.github/workflows/reusable-sanitizers-ci.yml

@@ -95,6 +95,18 @@ jobs:
       - name: Setup CCache
         uses: eProsima/eProsima-CI/external/setup-ccache-action@v0
 
+      - name: Set up hosts file for DNS testing
+        run: |
+          sudo echo "" | sudo tee -a /etc/hosts
+          sudo echo "127.0.0.1 localhost.test" | sudo tee -a /etc/hosts
+          sudo echo "::1 localhost.test" | sudo tee -a /etc/hosts
+          sudo echo "154.56.134.194 www.eprosima.com.test" | sudo tee -a /etc/hosts
+          sudo echo "216.58.215.164 www.acme.com.test" | sudo tee -a /etc/hosts
+          sudo echo "2a00:1450:400e:803::2004 www.acme.com.test" | sudo tee -a /etc/hosts
+          sudo echo "140.82.121.4 www.foo.com.test" | sudo tee -a /etc/hosts
+          sudo echo "140.82.121.3 www.foo.com.test" | sudo tee -a /etc/hosts
+          sudo echo "ff1e::ffff:efff:1 acme.org.test" | sudo tee -a /etc/hosts
+
       - name: Fetch Fast DDS dependencies
         uses: eProsima/eProsima-CI/multiplatform/vcs_import@v0
         with:
@@ -363,6 +375,18 @@ jobs:
           destination_workspace: src
           skip_existing: 'true'
 
+      - name: Set up hosts file for DNS testing
+        run: |
+          sudo echo "" | sudo tee -a /etc/hosts
+          sudo echo "127.0.0.1 localhost.test" | sudo tee -a /etc/hosts
+          sudo echo "::1 localhost.test" | sudo tee -a /etc/hosts
+          sudo echo "154.56.134.194 www.eprosima.com.test" | sudo tee -a /etc/hosts
+          sudo echo "216.58.215.164 www.acme.com.test" | sudo tee -a /etc/hosts
+          sudo echo "2a00:1450:400e:803::2004 www.acme.com.test" | sudo tee -a /etc/hosts
+          sudo echo "140.82.121.4 www.foo.com.test" | sudo tee -a /etc/hosts
+          sudo echo "140.82.121.3 www.foo.com.test" | sudo tee -a /etc/hosts
+          sudo echo "ff1e::ffff:efff:1 acme.org.test" | sudo tee -a /etc/hosts
+
       - name: Fetch Fast DDS CI dependencies
         uses: eProsima/eProsima-CI/multiplatform/vcs_import@v0
         with: