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ZStack Cloud 4.8.10>Tutorials>Private Cloud>Multi-MN HA Tutorial>CLI Guidance
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CLI Guidance

zsha2 has many sub-commands. This section will elaborate on what each sub-command is and how to use them.


-h

Description

Displays the help information, which allows you to view all sub-commands of zsha2.

Usage

[root@localhost ~]# zsha2 -h usage:   zsha2 [ global options ] command [ command options ]  Global options:  -h,--help           Display this message  Commands:  install-ha      install two-node HA environment  stop-node       stop zstack service in HA environment  start-node      start zstack service in HA environment  upgrade-mn      upgrade the MN in HA environment  upgrade-ha      upgrade the HA suites  demote          demote current node as backup  status          show HA status  show-config     show HA configuration  sample-config   generate sample configuration to setup HA environment  collect-log     collect HA related log files  help            show this help message

version

Description

Displays the version information, including the version No. and commit ID.

Usage

[root@localhost ~]# zsha2 version version 3.1.0.0, commit 2b1b06788e4e1d4b514342db1f381b460f7242e6

install-ha

Description

An installation command. If you installed two MNs, you could run the zsha2 installation command in a MN to switch to the dual-MN HA mode.

Usage

Parameter Description Example
-nic The physical device name, which is used to configure a VIP. In production environments, this parameter is usually a network management bridge. ./zsha2 install-ha -nic br_bond0
-gateway The arbitration gateway of the active and standby MNs. ./zsha2 install-ha -gateway 192.168.0.1
-slave Specifies the standby MN.
Note:
  • During the installation, the database of the standby MN will be overwritten by that of the active MN. Please exercise caution.
  • If the root password contains special shell characters, escape these characters.
 ./zsha2 install-ha -slave "root:password@192.168.196.125"
-vip Specifies the VIP for Keepalived communication. ./zsha2 install-ha -vip 192.168.199.151
-myip Optional. Specifies the local IP address. ./zsha2 install-ha -myip 192.168.195.200
-db-root-pw The database root password of the active and standby MNs. Make sure that these two MNs share the same database root password. ./zsha2 install-ha -db-root-pw zstack.mysql.password
-time-server Specifies a time synchronization server for unified time synchronization.
Note: You can specify multiple time servers at a time.
  • ./zsha2 install-ha -time-server 192.168.196.125
  • ./zsha2 install-ha -time-server 192.168.196.125,192.168.196.126
-cidr Optional. Specifies an network range, which must cover the IP address, VIP, and gateway of the active and standby MNs.
Note: If not specified, the system will calculate a minimum network range, which might fail to meet the requirements. We recommend that you specify a network range.
 ./zsha2 install-ha -cidr 192.168.0.0/16
-force Optional. Force runs the zsha2 installation command in the active MN if the database of the active and standby MNs cannot automatically synchronized for a long time.
Note: We recommend that you back up these two databases before you perform the force installation.
 ./zsha2 install-ha -force
-repo Optional. Specifies the YUM repository, which defaults to the local repository. ./zsha2 install-ha -repo zstack-local
-timeout Optional. The timeout for copying the databases of the active and standby MNs. Default: 600. Unit: second. ./zsha2 install-ha -timeout 600
-yes Optional. Indicates that all settings are allowed. ./zsha2 install-ha -yes
-config Optional. Initializes and installs an HA suite by using a configuration file. ./zsha2 install-ha -config zs-install.config
The following is an example of how to install an HA suite by specifying the command line:
[root@localhost ~]# ./zsha2 install-ha -nic br_bond0 -gateway 192.168.0.1 -slave "root:password@192.168.196.125" \ -vip 192.168.199.151 -myip 192.168.195.200 -db-root-pw zstack.mysql.password -time-server 192.168.196.125 -cidr 192.168.0.0/16 -yes Master IPv4 address:  192.168.195.200 ZStack version @ 192.168.195.200: 2.6.0 ZStack version @ 192.168.196.125: 2.6.0 Calculated CIDR: 192.168.0.0/16  Backuping databases on 192.168.196.125 (/var/lib/zstack/mysql-backup/zstack-backup-db-2018-10-09T164934-0800.gz) ...   Start installation ...   x checking network interface and gateway ... ✓ Task 1: checking network interface and gateway ... completed. x prepare HA-services ... ✓ Task 2: prepare HA-services ... completed. + setting up DB config before replication ... ✓ Task 3: setting up DB config before replication ... completed. x creating DB user for replication ... ✓ Task 4: creating DB user for replication ... completed. + update iptables rules ... ✓ Task 5: update iptables rules ... completed. + starting the initial replication ... *************************** 1. row ***************************             File: mysql-bin.000002         Position: 1844     Binlog_Do_DB: Binlog_Ignore_DB:  + starting the initial replication ... Local database backuped to /var/lib/zstack/mysql-backup/zstack-backup-db-2018-10-09T164934-0800.gz  ✓ Task 6: starting the initial replication ... completed. x wait peer slave sync status ...   Slave_IO_Running: Yes Slave_SQL_Running: Yes     Last_IO_Error:    Last_SQL_Error:        Last_Error:        Last_Errno: 0  ✓ Task 7: wait peer slave sync status ... completed. + wait local DB sync status ... *************************** 1. row ***************************             File: mysql-bin.000002         Position: 245     Binlog_Do_DB: Binlog_Ignore_DB:  x wait local DB sync status ...   Slave_IO_Running: Yes Slave_SQL_Running: Yes     Last_IO_Error:    Last_SQL_Error:        Last_Error:        Last_Errno: 0  ✓ Task 8: wait local DB sync status ... completed. + setting up keepalived ... ✓ Task 9: setting up keepalived ... completed. x check slave virtual IP settings ... ✓ Task 10: check slave virtual IP settings ... completed. x configuring ZStack servers ... ✓ Task 11: configuring ZStack servers ... completed. x installing HA scripts ... ✓ Task 12: installing HA scripts ... completed. x starting ZStack HA service ... ✓ Task 13: starting ZStack HA service ... completed. x waiting management node up and running ... ✓ Task 14: waiting management node up and running ... completed.  OK, installation completed.  Hints: - Stop server with:   zsha2 stop-node, - Start server with:  zsha2 start-node, - Get HA status with: zsha2 status -peer 192.168.196.125  Please also setup SSH pubkey-login between 192.168.195.200 and 192.168.196.125
The following is an example of how to install an HA suite by writing a configuration file:
[root@localhost ~]# ./zsha2 install-ha -config zs-install.config Master IPv4 address:  192.168.195.200 ZStack version @ 192.168.195.200: 2.6.0 ZStack version @ 192.168.196.125: 2.6.0 Calculated CIDR: 192.168.0.0/16  Backuping databases on 192.168.196.125 (/var/lib/zstack/mysql-backup/zstack-backup-db-2018-10-09T164934-0800.gz) ...   Start installation ...   x checking network interface and gateway ... ✓ Task 1: checking network interface and gateway ... completed. x prepare HA-services ... ✓ Task 2: prepare HA-services ... completed. + setting up DB config before replication ... ✓ Task 3: setting up DB config before replication ... completed. x creating DB user for replication ... ✓ Task 4: creating DB user for replication ... completed. + update iptables rules ... ✓ Task 5: update iptables rules ... completed. + starting the initial replication ... *************************** 1. row ***************************             File: mysql-bin.000002         Position: 1844     Binlog_Do_DB: Binlog_Ignore_DB:  + starting the initial replication ... Local database backuped to /var/lib/zstack/mysql-backup/zstack-backup-db-2018-10-09T164934-0800.gz  ✓ Task 6: starting the initial replication ... completed. x wait peer slave sync status ...   Slave_IO_Running: Yes Slave_SQL_Running: Yes     Last_IO_Error:    Last_SQL_Error:        Last_Error:        Last_Errno: 0  ✓ Task 7: wait peer slave sync status ... completed. + wait local DB sync status ... *************************** 1. row ***************************             File: mysql-bin.000002         Position: 245     Binlog_Do_DB: Binlog_Ignore_DB:  x wait local DB sync status ...   Slave_IO_Running: Yes Slave_SQL_Running: Yes     Last_IO_Error:    Last_SQL_Error:        Last_Error:        Last_Errno: 0  ✓ Task 8: wait local DB sync status ... completed. + setting up keepalived ... ✓ Task 9: setting up keepalived ... completed. x check slave virtual IP settings ... ✓ Task 10: check slave virtual IP settings ... completed. x configuring ZStack servers ... ✓ Task 11: configuring ZStack servers ... completed. x installing HA scripts ... ✓ Task 12: installing HA scripts ... completed. x starting ZStack HA service ... ✓ Task 13: starting ZStack HA service ... completed. x waiting management node up and running ... ✓ Task 14: waiting management node up and running ... completed.  OK, installation completed.  Hints: - Stop server with:   zsha2 stop-node, - Start server with:  zsha2 start-node, - Get HA status with: zsha2 status -peer 192.168.196.125  Please also setup SSH pubkey-login between 192.168.195.200 and 192.168.196.125









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