kvm-host: migrate-vm exits if DRBD is not up-to-date

CHANGELOG.md

@@ -32,7 +32,7 @@ The **patch** part changes is incremented if multiple releases happen the same m
 * fail2ban: add default variable fail2ban_dbpurgeage_default
 * fail2ban: add default variable fail2ban_dbpurgeage_default
 * fail2ban: add variable fail2ban_sshd_port to configure sshd port
-* kvm-host: release 23.08 for migrate-vm.sh
+* kvm-host: release 23.09 for migrate-vm.sh
 * nagios-nrpe: add a NRPE check-local command with completion.
 * nagios-nrpe: add a proper monitoring plugin for glusterfs (on servers, not for clients)
 * php: add new variable to disable oveeriding settings of php-fpm default pool (www)

kvm-host/files/migrate-vm.sh

@@ -11,13 +11,13 @@
 # * migrate "from"
 # * switch to Bash to use local and readonly variables
 
-VERSION="23.08"
+VERSION="23.09"
 
 show_version() {
     cat <<END
 migrate-vm version ${VERSION}
 
-Copyright 2018-2021 Evolix <info@evolix.fr>,
+Copyright 2018-2023 Evolix <info@evolix.fr>,
                Jérémy Lecour <jlecour@evolix.fr>,
                Victor Laborie <vlaborie@evolix.fr>
                and others.
@@ -70,6 +70,20 @@ is_drbd_resource() {
     test -f "$(drbd_config_file "${resource}")" && drbdadm role "${resource}" >/dev/null 2>&1
 }
 
+check_drbd_sync() {
+    resource=${1:-}
+
+    set +e
+    dstate=$(drbdadm dstate "${resource}" | grep -vF 'UpToDate/UpToDate')
+    cstate=$(drbdadm cstate "${resource}" | grep -vF 'Connected')
+    set -e
+
+    if [ -n "${dstate}" ] || [ -n "${cstate}" ]; then
+        echo "DRBD resource ${resource} is not up-to-date" >&2
+        exit 1
+    fi
+}
+
 drbd_peers() {
     drbd_config_file=$(drbd_config_file "${1:-}")
 
@@ -227,6 +241,8 @@ migrate_to() {
 
     echo "Start migration of ${vm} to ${remote_ip} (${remote_host})"
 
+    check_drbd_sync "${resource}"
+
     set_drbd_role primary "${resource}" "${remote_ip}"
     migrate_vm_to "${vm}" "${remote_ip}"
     set_drbd_role secondary "${resource}"