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vm:proxmox:cluster [2020/04/23 15:37] – niziakvm:proxmox:cluster [2020/09/16 07:52] (current) – niziak
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 ====== Cluster ====== ====== Cluster ======
 +
 +==== Different nodes configuration ====
 +
 +Cluster is using ONE shared content of ''/etc/pve''. Content of this directory is synchronized on all cluster nodes.
 +**IMPACT**: 
 +  * storage configuration is one for whole cluster. To create local node storage, storage should be limited only own node.
 +  * Joining pure Debian based node (BTRFS FS) to cluster will result with "local-zfs" storage visible on Debian BTRFS node with ''?'' sign. To prevent creation unusable storage, storage can be limited to some nodes. Please edit storage and limit it to own node.
 +  * Custom storage config on nodes can disappear because only one shared config is used
 +     * Storage removed due to cluster joining can be added manually under another name and then restricted to specific node.
 +     * [[vm:proxmox:zfs#create_local-zfs|create "local-zfs"]]
 +**NOTE**: make copy of ''/etc/pve/storage.cfg'' from each node before joining to cluster.
 +**NOTE**: create all custom mounts or ZFS pools before joining cluster.
 +
 +==== local-ZFS replication ====
 +
 +It is possible to schedule replication of containers/VMs to another node. It makes periodic snapshot on remote local storage. 
 +It gives data redundancy and reduces downtime when container is moved between local storage on each node.
 +
 +
 +==== shared storage ====
 +  * it is recommended to use shared storage available from all nodes.
 +    * for file pool types (iso, backups) easiest is to use NFS/CIFS share.
 +    * 
 +
 +
 +==== Live migration ====
 +  * It is only possible if VM disc resides on shared network storage (available from all nodes)
 +
 +
  
 ===== Preparation ===== ===== Preparation =====
  
-There is one shared cluster storage configuration. For example "local-zfs" storage will be configured on each node.  +Second network interface with separate internal IP network is recommended for redundancy and shared storage bandwidth.
-TBD: This let migration of VMS to the same +
  
-Joining pure Debian based node (BTRFS FS) to cluster will result with "local-zfs" storage visible on Debian BTRFS node with ''?'' sign.  
-To prevent creation unusable storage, storage can be limited to some nodes. Please edit storage and limit it to own node. 
-Storage removed due to cluster joining can be added manually under another name and then restricted to specific node. 
  
 ===== Creation ===== ===== Creation =====
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 From Proxmox 6.0 it is possible to use GUI t ocreate and join cluster. From Proxmox 6.0 it is possible to use GUI t ocreate and join cluster.
  
-Second network interface with separate internal IP network is recommended for redundacy. 
  
-Datacenter --> Cluster --> Create cluster+''Datacenter'' --> ''Cluster'' --> ''Create cluster''
  
  
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 </code> </code>
 Joining process will be waiting infinitely until iSCSI device will be connected. During this time it is possible to disable CHAP authentication in remote iSCSI target, or provide common credentials for Target Portal Group. Joining process will be waiting infinitely until iSCSI device will be connected. During this time it is possible to disable CHAP authentication in remote iSCSI target, or provide common credentials for Target Portal Group.
 +
  
 ==== iSCSI issue with CHAP ==== ==== iSCSI issue with CHAP ====
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- 
- 
- 
- 
-====== CEPH ====== 
- 
-===== Installation ===== 
- 
-  * On one of node: 
-    * Datacenter --> Cepth --> Install Ceph-nautilus 
-    * Configuration tab 
-    * First Ceph monitor - set to current node. NOTE. Not possible to use other nodes now because there is no Ceph installed on it 
-  * Repeat installation on each node. Configuration will be detected automatically. 
-  * On each node - add additional monitors: 
-    * Select node --> Ceph --> Monitor 
-      * "Create" button in Monitor section, and select available nodes. 
- 
-===== create OSD ===== 
- 
-Create Object Storage Daemon 
- 
- 
- 
- 
-