[v1.0.1-rhel] Do not use ipv6 autoconf

src/network/core_utils.rs

@@ -1176,6 +1176,30 @@ impl CoreUtils {
             }
         };
         tokio::spawn(_connection);
+
+        // make sure autoconf is off, we want manaully config only
+        if let Err(err) = CoreUtils::apply_sysctl_value(
+            format!("/proc/sys/net/ipv6/conf/{}/autoconf", ifname),
+            "0",
+        ) {
+            match err {
+                SysctlError::NotFound(_) => {
+                    // if the sysctl is not found we likely run on a system without ipv6
+                    // just ignore that case
+                }
+
+                // if we have a read only /proc we ignore it as well
+                SysctlError::IoError(ref e) if e.raw_os_error() == Some(libc::EROFS) => {}
+
+                _ => {
+                    return Err(std::io::Error::new(
+                        std::io::ErrorKind::Other,
+                        format!("failed to set autoconf sysctl: {}", err),
+                    ));
+                }
+            }
+        };
+
         // ip netns exec ip link set <ifname> up
         if let Err(err) = CoreUtils::set_link_up(&handle, ifname).await {
             return Err(err);

test/300-macvlan.bats

@@ -33,6 +33,9 @@ function setup() {
     run_in_container_netns ip r
     assert "$output" "=~" "default via 10.88.0.1" "gateway must be there in default route"
     assert_json "$result" ".podman.interfaces.eth0.subnets[0].gateway" == "10.88.0.1" "Result contains gateway address"
+
+    run_in_container_netns cat /proc/sys/net/ipv6/conf/eth0/autoconf
+    assert "0" "autoconf is disabled"
 }
 
 @test "macvlan setup with mtu" {