Chapter 9. Getting started with the pcsd Web UI
pcsd Web UI is a graphical user interface to create and configure Pacemaker/Corosync clusters.
9.1. Setting up the pcsd Web UI
This procedure sets up your system to use the
pcsd Web UI to configure a cluster.
- The Pacemaker configuration tools are installed.
- Your system is set up for cluster configuration,
For instructions on installing cluster software and setting up your system for cluster configuration, see Installing cluster software.
On any system, open a browser to the following URL, specifying one of the nodes of the cluster (note that this uses the
httpsprotocol). This brings up the
pcsdWeb UI login screen.
Log in as user
hacluster. This brings up the
Manage Clusterspage as shown in the following figure.
Figure 9.1. Manage Clusters page
9.2. Configuring a high availability pcsd Web UI
When you use the
pcsd Web UI, you connect to one of the nodes of the cluster to display the cluster management pages. If the node to which you are connecting goes down or becomes unavailable, you can reconnect to the cluster by opening your browser to a URL that specifies a different node of the cluster. It is possible, however, to configure the
pcsd Web UI itself for high availability, in which case you can continue to manage the cluster without entering a new URL.
To configure the
pcsd Web UI for high availability, perform the following steps.
Ensure that the
pcsdcertificates are synced across the nodes of the cluster by setting
/etc/sysconfig/pcsdconfiguration file. Enabling certificate syncing causes
pcsdto sync the certificates for the cluster setup and node add commands. In RHEL 8,
PCSD_SSL_CERT_SYNC_ENABLEDis set to
IPaddr2cluster resource, which is a floating IP address that you will use to connect to the
pcsdWeb UI. The IP address must not be one already associated with a physical node. If the
IPaddr2resource’s NIC device is not specified, the floating IP must reside on the same network as one of the node’s statically assigned IP addresses, otherwise the NIC device to assign the floating IP address cannot be properly detected.
Create custom SSL certificates for use with
pcsdand ensure that they are valid for the addresses of the nodes used to connect to the
- To create custom SSL certificates, you can use either wildcard certificates or you can use the Subject Alternative Name certificate extension. For information on the Red Hat Certificate System, see the Red Hat Certificate System Administration Guide.
Install the custom certificates for
pcs pcsd certkeycommand.
pcsdcertificates to all nodes in the cluster with the
pcs pcsd sync-certificatescommand.
Connect to the
pcsdWeb UI using the floating IP address you configured as a cluster resource.
Even when you configure the
pcsd Web UI for high availability, you will be asked to log in again when the node to which you are connecting goes down.