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en:faq:materiel:cluster [27/09/2018 09:49] jdesouza [SERVER'S SUPERVISION WEB PAGE] |
en:faq:materiel:cluster [04/01/2019 10:15] (current) jdesouza [FAQ : Cluster monitoring] |
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| - | ====== FAQ : Cluster monitoring ====== | + | ====== Procedure: Cluster monitoring ====== |
| ===== Scope ===== | ===== Scope ===== | ||
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| At a minimum, each server uses 3 network adapters configured as follows: | At a minimum, each server uses 3 network adapters configured as follows: | ||
| - | • ETH1 = Main Network Interface = IP_Server | + | * ETH1 = Main Network Interface = IP_Server |
| - | + | * ETH2 = bridged network interface for virtual machines = IP_Br0 | |
| - | • ETH2 = bridged network interface for virtual machines = IP_Br0 | + | * ETH3 = "Private" server synchronization network interface, direct link between the cluster nodes. |
| - | + | ||
| - | • ETH3 = "Private" server synchronization network interface, direct link between the cluster nodes. | + | |
| On HP servers, the HP_ILO management interface for monitoring the machine can be set to benefit from the information of the server's physical state (see ILO monitoring documentation). | On HP servers, the HP_ILO management interface for monitoring the machine can be set to benefit from the information of the server's physical state (see ILO monitoring documentation). | ||
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| * Libvirtguest = Virtualization Management Tools | * Libvirtguest = Virtualization Management Tools | ||
| * IP Cluster / Route Cluster = Active Network Node | * IP Cluster / Route Cluster = Active Network Node | ||
| - | NOTE: All Linux services are controlled by Corosync, do not use the standard services of Linux daemons, do not use "services" or "systemctl" commands or automatic scripts like "samba". Any activation of the services by this type of command cancels the system monitoring by peacemaker and corosync. | + | |
| + | |||
| + | <note important>All Linux services are controlled by Corosync, do not use the standard services of Linux daemons, do not use "services" or "systemctl" commands or automatic scripts like "samba". Any activation of the services by this type of command cancels the system monitoring by peacemaker and corosync.</note> | ||
| ===== Server's supervision web page ===== | ===== Server's supervision web page ===== | ||
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| {{cluster_Image_2.png?600}} | {{cluster_Image_2.png?600}} | ||
| - | ===== CHECKING THE SYNCHRONIZATION OF CLUSTER DATA ===== | + | ===== Checking the synchronization of cluster data ===== |
| - | In a terminal or by ssh access on one of the cluster nodes use the "drbd-overview" command | + | In a terminal or by ssh access on one of the cluster nodes use the ''drbd-overview'' command |
| {{cluster_Image_3.png}} | {{cluster_Image_3.png}} | ||
| - | Here the 2 primary and secondary servers are perfectly synchronized at the data level since the status "UpToDate" is effective on both servers. | + | Here the 2 primary and secondary servers are perfectly synchronized at the data level since the status ''UpToDate'' is effective on both servers. |
| Primary / Secondary Uptodate / Uptodate shows the synchronization status of the 2 nodes of the cluster. | Primary / Secondary Uptodate / Uptodate shows the synchronization status of the 2 nodes of the cluster. | ||
| Line 64: | Line 65: | ||
| In case the DRBD service is not started correctly (Cluster out of service), it is possible to restart the server data synchronization service via the following command: | In case the DRBD service is not started correctly (Cluster out of service), it is possible to restart the server data synchronization service via the following command: | ||
| - | # service drbdserv --full-restart | + | ''# service drbdserv --full-restart'' |
| - | ===== VALIDATION OF THE CORRECT FUNCTIONING OF THE CLUSTER (COROSYNC) ===== | + | ===== Validation of the correct functioning of the cluster (Corosync) ===== |
| - | To know the state of the services managed by the cluster via a terminal or by access ssh, use the command "crm status" | + | To know the state of the services managed by the cluster via a terminal or by access ssh, use the command ''crm status'' |
| {{cluster_Image_4.png}} | {{cluster_Image_4.png}} | ||
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| {{cluster_Image_5.png}} | {{cluster_Image_5.png}} | ||
| - | ===== DESCRIPTION OF THE CONFIGURATION FILE ===== | + | ===== Description of the configuration file ===== |
| + | |||
| + | == The first block indicates the state of the cluster== | ||
| - | The first block indicates the state of the cluster | ||
| - | ============ | ||
| Last updated: Sun Sep 23 08:21:21 2018 | Last updated: Sun Sep 23 08:21:21 2018 | ||
| Line 96: | Line 97: | ||
| 11 Resources configured. | 11 Resources configured. | ||
| - | The second block tells you which is the primary node, and where are the services: | + | == The second block tells you which is the primary node, and where are the services == |
| - | ============ | ||
| Online: [ dzacupsvr dzacupsvr2 ] | Online: [ dzacupsvr dzacupsvr2 ] | ||
| Line 130: | Line 131: | ||
| => the 2 servers are "online", and each service is operational on the primary. | => the 2 servers are "online", and each service is operational on the primary. | ||
| - | ===== VERIFYING THE CORRECT FUNCTIONING OF THE CLUSTER ===== | + | ===== Verifying the correct functioning of the cluster ===== |
| See the cluster configuration, use the following command: | See the cluster configuration, use the following command: | ||
| - | # crm configure show | + | ''# crm configure show'' |
| - | Example of a configuration file of the Abidjan cluster: | + | __Example of a configuration file of the Abidjan cluster:__ |
| {{cluster_Image_6.png}} | {{cluster_Image_6.png}} | ||
| - | ===== COmmands FOR VERIFYING THE CORRECT FUNCTIONING OF THE CLUSTER ===== | + | ===== Commands for verifying the correct functioning of the cluster ===== |
| - | for example « abjairsvr2 » | + | **for example « abjairsvr2 »** |
| |DESIRED Action |SYSTEM Command| | |DESIRED Action |SYSTEM Command| | ||
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| |Check that the configuration files are identical between the nodes of a server| crm cluster diff /etc/samba/smb.conf| | |Check that the configuration files are identical between the nodes of a server| crm cluster diff /etc/samba/smb.conf| | ||
| - | ===== VERIFICATION OF CLUSTER MANAGEMENT TOOLS ===== | + | ===== Verification of cluster management tools ===== |
| |DESIRED Action |SYSTEM Commands| | |DESIRED Action |SYSTEM Commands| | ||