PCS Cluster is required for: - The role LB (Load Balancer), if two load balancers are used for redundancy
- The role STORE (file storage), if two file stores are setup using DRBD for redundancy
If the system does not contain redundancy, do not install this. Only install on the above roles. Install PCS Services (Both nodes)Install the PCS packages and stop the services. | Translations Ignore |
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apt-get update
apt-get -y install pacemaker corosync pcs haveged
systemctl stop pcsd
systemctl stop pacemaker
systemctl stop corosync |
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Disable Managed Services (Both nodes)Disable smb since this will be managed by pacemaker: | Translations Ignore |
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systemctl disable smbd |
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Configuration Settings (Both nodes)Next configure the names of the machines and the virtual IP address which will be shared in the cluster: | Status |
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| title | Caution Password |
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JT_HOST1=acd-lb1
JT_HOST2=acd-lb2
PASSWORD=<password> |
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Next configure the firewall for ha services: | Translations Ignore |
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ufw allow 2224/tcp
ufw allow 3121/tcp
ufw allow 5403/tcp
ufw allow 5404/udp
ufw allow 5405/udp
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Change user password (Both nodes)Change the password of the hacluster user (replace <password> with the chosen password): | Translations Ignore |
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echo hacluster:${PASSWORD} | chpasswd |
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Cluster ConfigurationNode 1 - Create Cluster KeyCreate a key for the cluster and copy to server 2: | Translations Ignore |
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# On Server 1
corosync-keygen
scp /etc/corosync/authkey jtel@acd-lb2:/home/jtel/
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Node 2 - Move Cluster KeyMove the cluster key to the configuration directory and setup rights: | Translations Ignore |
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# On Server 2
mv /home/jtel/authkey /etc/corosync/
chown root:root /etc/corosync/authkey
chmod 400 /etc/corosync/authkey
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Both Nodes - Create Corosync Configuration| Warning |
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Note: the hosts file must be configured for this to work. |
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mv /etc/corosync/corosync.conf /etc/corosync/corosync.conf.orig
cat << EOFF > /etc/corosync/corosync.conf
totem {
version: 2
cluster_name: jtel_cluster
transport: knet
crypto_cipher: aes256
crypto_hash: sha256
token: 4000
}
nodelist {
node {
ring0_addr: acd-lb1
name: acd-lb1
nodeid: 1
}
node {
ring0_addr: acd-lb2
name: acd-lb2
nodeid: 2
}
}
quorum {
provider: corosync_votequorum
two_node: 1
}
logging {
to_logfile: yes
logfile: /var/log/corosync/corosync.log
to_syslog: yes
timestamp: on
}
EOFF
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Start Cluster - Both Nodes| Translations Ignore |
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systemctl enable corosync
systemctl enable pacemaker
systemctl enable pcsd
systemctl start corosync
systemctl start pacemaker
systemctl start pcsd
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Resource Cleanup - One Node| Translations Ignore |
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pcs resource cleanup
pcs status |
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Check if the output is okOK. | Translations Ignore |
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pcs property set stonith-enabled=false
pcs property set no-quorum-policy=ignore
pcs resource defaults migration-threshold=1
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Test
Check the results on both machines: | Translations Ignore |
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root@test-lb1:/home/jtel# pcs status
Cluster name: jtel_cluster
Stack: corosync
Current DC: acd-lb1 (version 2.0.1-9e909a5bdd) - partition with quorum
Last updated: Tue Feb 23 07:49:26 2021
Last change: Tue Feb 23 07:40:58 2021 by root via cibadmin on acd-lb1
2 nodes configured
0 resources configured
Online: [ acd-lb1 acd-lb2 ]
No resources
Daemon Status:
corosync: active/enabled
pacemaker: active/enabled
pcsd: active/enabled |
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root@acd-store1-test:/home/jtel# pcs config
Cluster Name: jtel_cluster
Corosync Nodes:
acd-store1-test acd-store2-test
Pacemaker Nodes:
acd-store1-test acd-store2-test
Resources:
Stonith Devices:
Fencing Levels:
Location Constraints:
Ordering Constraints:
Colocation Constraints:
Ticket Constraints:
Alerts:
No alerts defined
Resources Defaults:
Meta Attrs: rsc_defaults-meta_attributes
migration-threshold=1
Operations Defaults:
No defaults set
Cluster Properties:
cluster-infrastructure: corosync
cluster-name: debian
dc-version: 2.0.5-ba59be7122
have-watchdog: false
no-quorum-policy: ignore
stonith-enabled: false
Tags:
No tags defined
Quorum:
Options: |
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