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pvecm.adoc: improve document structure

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Dietmar Maurer 2016-04-09 17:21:50 +02:00
parent 960f634409
commit ceabe189d9
1 changed files with 20 additions and 17 deletions
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pvecm.adoc
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@ -58,27 +58,29 @@ Requirements
* All nodes must be in the same network as corosync uses IP Multicast * All nodes must be in the same network as corosync uses IP Multicast
to communicate between nodes (also see to communicate between nodes (also see
http://www.corosync.org[Corosync Cluster Engine]). NOTE: Some http://www.corosync.org[Corosync Cluster Engine]). Corosync uses UDP
switches do not support IP multicast by default and must be manually ports 5404and 5405 for cluster communication.
enabled first. +
NOTE: Some switches do not support IP multicast by default and must be
manually enabled first.
* Date and time have to be synchronized. * Date and time have to be synchronized.
* SSH tunnel on port 22 between nodes is used. * SSH tunnel on TCP port 22 between nodes is used.
* If you are interested in High Availability too, for reliable quorum * If you are interested in High Availability, you need to have at
you must have at least 3 nodes (all nodes should have the same least three nodes for reliable quorum. All nodes should have the
version). same version.
* We recommend a dedicated NIC for the cluster traffic, especially if * We recommend a dedicated NIC for the cluster traffic, especially if
you use shared storage. you use shared storage.
NOTE: It is not possible to mix Proxmox VE 3.x and earlier with NOTE: It is not possible to mix Proxmox VE 3.x and earlier with
Proxmox VE 4.0 cluster. Proxmox VE 4.0 cluster nodes.
Cluster Setup Preparing Nodes
------------- ---------------
First, install {PVE} on all nodes. Make sure that each node is First, install {PVE} on all nodes. Make sure that each node is
installed with the final hostname and IP configuration. Changing the installed with the final hostname and IP configuration. Changing the
@ -89,7 +91,7 @@ need to login via 'ssh'.
Create the Cluster Create the Cluster
~~~~~~~~~~~~~~~~~~ ------------------
Login via 'ssh' to the first Proxmox VE node. Use a unique name for Login via 'ssh' to the first Proxmox VE node. Use a unique name for
your cluster. This name cannot be changed later. your cluster. This name cannot be changed later.
@ -102,7 +104,7 @@ To check the state of your cluster use:
Adding Nodes to the Cluster Adding Nodes to the Cluster
~~~~~~~~~~~~~~~~~~~~~~~~~~~ ---------------------------
Login via 'ssh' to the node you want to add. Login via 'ssh' to the node you want to add.
@ -111,15 +113,16 @@ Login via 'ssh' to the node you want to add.
For `IP-ADDRESS-CLUSTER` use the IP from an existing cluster node. For `IP-ADDRESS-CLUSTER` use the IP from an existing cluster node.
CAUTION: A new node cannot hold any VM´s, because you would get CAUTION: A new node cannot hold any VM´s, because you would get
conflicts about identical VM IDs. To workaround, use vzdump to backup conflicts about identical VM IDs. Also, all existing configuration is
and to restore to a different VMID after adding the node to the overwritten when you join a new node to the cluster. To workaround,
cluster. use vzdump to backup and restore to a different VMID after adding
the node to the cluster.
To check the state of cluster: To check the state of cluster:
# pvecm status # pvecm status
.Check Cluster Status .Cluster status after adding 4 nodes
---- ----
hp2# pvecm status hp2# pvecm status
Quorum information Quorum information
@ -167,7 +170,7 @@ Membership information
Remove a Cluster Node Remove a Cluster Node
~~~~~~~~~~~~~~~~~~~~~ ---------------------
CAUTION: Read carefully the procedure before proceeding, as it could CAUTION: Read carefully the procedure before proceeding, as it could
not be what you want or need. not be what you want or need.