ci: Use search_domain for one resource in CI test (#8393)

- Adds a `search_domain` of `httpbin.test` in seeds
- Updates one of our DNS resources under CI test to use this

scripts/tests/direct-dns-api-down.sh

@@ -2,7 +2,7 @@
 
 source "./scripts/tests/lib.sh"
 
-HTTPBIN=dns.httpbin
+HTTPBIN=dns
 
 function run_test() {
     echo "# Access httpbin by DNS"

scripts/tests/direct-dns-two-resources.sh

@@ -5,7 +5,7 @@
 
 source "./scripts/tests/lib.sh"
 
-RESOURCE1=dns.httpbin
+RESOURCE1=dns
 RESOURCE2=download.httpbin
 
 echo "# Try to ping httpbin as DNS resource 1"

scripts/tests/direct-dns.sh

@@ -5,7 +5,8 @@
 
 source "./scripts/tests/lib.sh"
 
-HTTPBIN=dns.httpbin
+HTTPBIN=dns
+HTTPBIN_FQDN="$HTTPBIN.httpbin.search.test"
 
 # Re-up the gateway since a local dev setup may run this back-to-back
 docker compose up -d gateway --no-build
@@ -14,7 +15,7 @@ echo "# check original resolv.conf"
 client sh -c "cat /etc/resolv.conf.before-firezone"
 
 echo "# Make sure gateway can reach httpbin by DNS"
-gateway sh -c "curl --fail $HTTPBIN/get"
+gateway sh -c "curl --fail $HTTPBIN_FQDN/get"
 
 echo "# Try to ping httpbin as a DNS resource"
 client_ping_resource "$HTTPBIN"

scripts/tests/systemd/dns-systemd-resolved.sh

@@ -25,14 +25,15 @@ create_token_file
 
 sudo cp "scripts/tests/systemd/$SERVICE_NAME.service" /usr/lib/systemd/system/
 
-HTTPBIN=dns.httpbin
+HTTPBIN=dns
+HTTPBIN_FQDN="$HTTPBIN.httpbin.search.test"
 
 # I'm assuming the docker iface name is relatively constant
 DOCKER_IFACE="docker0"
 FZ_IFACE="tun-firezone"
 
 echo "# Make sure gateway can reach httpbin by DNS"
-gateway sh -c "curl --fail $HTTPBIN/get"
+gateway sh -c "curl --fail $HTTPBIN_FQDN/get"
 
 echo "# Accessing a resource should fail before the client is up"
 # Force curl to try the Firezone interface. I can't block off the Docker interface yet

scripts/tests/tcp-dns.sh

@@ -4,8 +4,11 @@ source "./scripts/tests/lib.sh"
 
 client sh -c "apk add bind-tools" # The compat tests run using the production image which doesn't have `dig`.
 
-echo "Resolving DNS resource over TCP"
-client sh -c "dig +tcp dns.httpbin"
+echo "Resolving DNS resource over TCP with search domain"
+client sh -c "dig +search +tcp dns"
+
+echo "Resolving DNS resource over TCP with FQDN"
+client sh -c "dig +tcp download.httpbin"
 
 echo "Resolving non-DNS resource over TCP"
 client sh -c "dig +tcp example.com"