Ashraf Sharif

1. Community
2. Knowledge Base - HAProxy
3. Install HAProxy and Keepalived (Virtual IP)

Hi Aiman,   Try to check firewall setting on backup host and ARP table on client host. You can use command "arp -an" to verify the latest virtual IP mapping. It should be mapped to the backup host'...

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• Ashraf Sharif
• July 25, 2013 06:07
• 0 votes

1. Community
2. Knowledge Base - HAProxy
3. Setting up HAProxy

Hi Pablob, Haproxy version 1.5 is yet to be released on stable line. But of course you can install/recompile to the version that you want. Just make sure to maintain the same path to the Haproxy bi...

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• Ashraf Sharif
• February 11, 2014 04:50
• 0 votes

1. Community
2. Knowledge Base - MySQL Galera
3. Percona XtraBackup v.2.3.2

Hi, The problem is already fixed if you are running on ClusterControl v1.2.11-985 and later. Upgrade instructions are available at: http://support.severalnines.com/entries/21095371-CMON-1-2-12-rele...

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• Ashraf Sharif
• February 02, 2016 03:24
• 0 votes

1. Community
2. Knowledge Base - MySQL Galera
3. galera cluster across multiple dc's

Hi, Total nodes (across sites) need to be an odd number. Let's say if you have A,B,C as the sites. If you have 2 sites, A holds primary status where garbd is located and B holds the secondary. Both...

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• Ashraf Sharif
• September 09, 2015 00:42
• 0 votes

1. Community
2. Knowledge Base - MySQL Galera
3. galera cluster across multiple dc's

For more resilient solution, garbd on third site is preferable but it could cost you more. If you have very good connectivity between both sites, 2-site solution would be enough though. It's your c...

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• Ashraf Sharif
• September 09, 2015 02:01
• 0 votes

1. Community
2. Knowledge Base - MySQL Galera
3. Continual Node Failure

Hi Jason, It would be helpful if you can generate an error report and attach it here so we can understand your cluster. Instructions at: http://support.severalnines.com/entries/21091498-Error-repor...

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• Ashraf Sharif
• August 07, 2015 03:52
• 0 votes

1. Community
2. Knowledge Base - MySQL Galera
3. Can't monitor nodes performance after upgrading CMON from 1.2.8 to 1.2.9

Hi Diptin, What is the output of following statements on ClusterControl node? mysql -u root -p cmon -e 'select * from mysql_server' mysql -u root -p cmon -e 'select * from hosts' Also please also s...

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• Ashraf Sharif
• February 19, 2015 17:05
• 0 votes

1. Community
2. Knowledge Base - MySQL Galera
3. Can't monitor nodes performance after upgrading CMON from 1.2.8 to 1.2.9

Hi Diptin, How did you perform the upgrade? Did you follow the instructions here: http://support.severalnines.com/entries/21095371-CMON-1-2-9-released-upgrade-instructions ClusterControl 1.2.9 requ...

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• Ashraf Sharif
• February 19, 2015 02:40
• 0 votes

1. Community
2. Knowledge Base - MySQL Galera
3. CMON does not pull Network, CPU, Disk stat from Nodes

Hi Anushka, I need to double check on this. May I know what is your environment (DB cluster type/vendor, OS distribution, virtualization platform etc)? Did you use bootstrap script from http://www....

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• Ashraf Sharif
• March 06, 2014 05:41
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1. Community
2. Knowledge Base - MySQL Galera
3. CMON does not pull Network, CPU, Disk stat from Nodes

Hi, Can you make sure that in ClusterControl's /etc/cmon.cnf contains following line: agentless=1 If it does not exist, please add it and restart cmon by using "service cmon restart". Regards, Ashraf

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• Ashraf Sharif
• March 05, 2014 17:13
• 0 votes