smtp1: Fix mynetworks setting for k8s network

The "Kubernetes" subnet is a /27, not a /28.  There are hosts in that
upper section that was masked out, and these were unable to send e-mails
via the relay because they were excluded from the `mynetworks` value.

host_vars/smtp1.pyrocufflink.blue/main.yml

@@ -11,4 +11,4 @@ smtp_mynetworks:
 - '[2605:6000:3ccd:da01::]/64'
 - 172.30.0.240/28
 - 172.31.1.0/24
-- 172.30.0.160/28
+- 172.30.0.160/27

roles/repohost/files/repohost-createrepo.sh

@@ -1,18 +1,30 @@
 #!/bin/sh
+# vim: set sw=4 ts=4 sts=4 et :
 
 QFILE="${HOME}"/createrepo.queue
 REPOS_ROOT="${HOME}"/repos
 
+wait_queue() {
+    inotifywait \
+        --event close_write \
+        --include "${QFILE##*/}" \
+        "${QFILE%/*}"
+}
+
 createrepo_loop() {
-    while sleep 30; do
-        [ -f "${QFILE}" ] || continue
-        mv "${QFILE}" "${QFILE}.work"
-        sort -u "${QFILE}.work" > "${QFILE}.sorted"
-        while read dir; do
-            printf 'Generating repository metadata for %s\n' "${dir}"
-            createrepo_c "${dir}"
-        done < "${QFILE}.sorted"
-        rm -f "${QFILE}.work" "${QFILE}.sorted"
+    while wait_queue; do
+        while [ -f "${QFILE}" ]; do
+            sleep 10
+            flock "${QFILE}" mv "${QFILE}" "${QFILE}.work"
+            sort -u "${QFILE}.work" > "${QFILE}.sorted"
+            while read dir; do
+                if [ -d "${dir}" ]; then
+                    printf 'Generating repository metadata for %s\n' "${dir}"
+                    createrepo_c "${dir}"
+                fi
+            done < "${QFILE}.sorted"
+            rm -f "${QFILE}.work" "${QFILE}.sorted"
+        done
     done
 }