cloudron-support: ipv6 check

scripts/cloudron-support

@@ -361,6 +361,16 @@ function check_node() {
     success "node version is correct"
 }
 
+function check_ipv6() {
+    ipv6_disable=$(cat /sys/module/ipv6/parameters/disable)
+    if [[ "${ipv6_disable}" == "1" ]]; then
+        fail "IPv6 is disabled in kernel. Cloudron requires IPv6 in kernel"
+        echo "Instead of disabling IPv6 globally, you can disable it at an interface level using 'net.ipv6.conf.<interface>.disable_ipv6 = 1'"
+    fi
+
+    success "IPv6 is enabled"
+}
+
 function check_docker() {
     if ! systemctl is-active -q docker; then
         info "Docker is down. Trying to restart docker ..."
@@ -503,6 +513,7 @@ function troubleshoot() {
     # note: disk space test has already been run globally
     print_system
     check_node
+    check_ipv6
     check_docker
     check_host_mysql
     check_nginx # requires mysql to be checked