Update rancher-galera post

Signed-off-by: René Jochum <rene@jochums.at>

content/post/rancher-k3s-with-galera.md

@@ -40,7 +40,7 @@ sudo apt-key adv --fetch-keys 'https://mariadb.org/mariadb_release_signing_key.a
 sudo add-apt-repository 'deb [arch=amd64,arm64,ppc64el] http://ftp.hosteurope.de/mirror/mariadb.org/repo/10.4/ubuntu bionic main'
 
 sudo apt update
-sudo apt install mariadb-server mariadb-client
+sudo apt install mariadb-server mariadb-client mariadb-backup
 ```
 
 ##### Secure MariaDB on each Node
@@ -128,22 +128,26 @@ sudo systemctl stop mariadb
 Liste on all Interfaces (if you want configure it to listen only on a specific address):
 
 ```bash
+sudo sed -i 's/max_connections\t\t= 100/max_connections\t\t= 1000/g' /etc/mysql/my.cnf
 sudo sed -i 's/bind-address\t\t= 127.0.0.1/#bind-address\t\t= 127.0.0.1/g' /etc/mysql/my.cnf
 ```
 
 Enable Galera, Paste the following into /etc/mysql/mariadb.conf.d/99-cluster.cnf
 
-```
+```conf
 [galera]
 
-wsrep_on = on 
+wsrep_on = on
 wsrep_provider = /usr/lib/galera/libgalera_smm.so
 wsrep_cluster_address = gcomm://10.128.1.17,10.128.1.18,10.128.1.19 
-wsrep_cluster_name = k3s_cluster_0 
+wsrep_cluster_name = k3s_cluster_0
+wsrep_provider_options="gcache.size = 512M"
+wsrep_sst_method = mariabackup
+wsrep_sst_auth = root:SuperSecretRootPassword
 
-default_storage_engine = InnoDB 
-innodb_autoinc_lock_mode = 2 
-innodb_doublewrite = 1 
+default_storage_engine = InnoDB
+innodb_autoinc_lock_mode = 2
+innodb_doublewrite = 1
 
 binlog_format = ROW
 ```
@@ -156,7 +160,7 @@ Some tuning if you use this Galera cluster for other purposes
 sudo nano /etc/mysql/mariadb.conf.d/98-tuning.cnf
 ```
 
-```
+```conf
 [mysqld]
 key_buffer_size=256M
 thread_stack=192K
@@ -182,6 +186,12 @@ One **one** node run `sudo galera_new_cluster`
 
 One the other 2 nodes run: `sudo systemctl start mariadb.service`
 
+##### Check the MariaDB Galera Cluster
+
+```bash
+mysql -u root -p -e "SELECT * FROM information_schema.global_status WHERE variable_name IN ('WSREP_CLUSTER_STATUS','WSREP_LOCAL_STATE_COMMENT','WSREP_CLUSTER_SIZE','WSREP_EVS_REPL_LATENCY','WSREP_EVS_DELAYED','WSREP_READY');"
+```
+
 ##### Create the k3s Database
 
 One one node run: