{"id":41297,"date":"2022-05-13T12:51:49","date_gmt":"2022-05-13T12:51:49","guid":{"rendered":"https:\/\/dbtut.com\/?p=41297"},"modified":"2022-05-13T12:51:49","modified_gmt":"2022-05-13T12:51:49","slug":"download-edb-failover-manager","status":"publish","type":"post","link":"https:\/\/dbtut.com\/index.php\/2022\/05\/13\/download-edb-failover-manager\/","title":{"rendered":"Download EDB Failover Manager"},"content":{"rendered":"<p>In this article, I will tell you about the Download EDB Failover Manager.<\/p>\n<h5>The EFM cluster consists of:<\/h5>\n<p>1. An active primary server where transactions take place.<\/p>\n<p>2. One or more standby databases.<\/p>\n<p>3. Witness server assists efm cluster in decision making during primary or standby failover scenario.<br \/>\nHowever, if there is more than one standby node, the witness server is not required.<\/p>\n<p>If you have not done the EDB installation and standby installation before, you can perform the installations by following the links below.<\/p>\n<p>EDB PostgreSQL Installation:<\/p>\n<pre class=\"lang:default decode:true \">https:\/\/dbtut.com\/index.php\/2022\/03\/22\/edb-postgres-13-installation-on-oracle-linux-7-8\/<\/pre>\n<p>EDB Standby Setup:<\/p>\n<pre class=\"lang:default decode:true \">https:\/\/dbtut.com\/index.php\/2022\/04\/27\/creating-a-hot-standby-in-edb-postgresql\/<\/pre>\n<p>ENVIRONMENT DETAILS:<\/p>\n<p><em class=\"lo\">PRIMARY DB SERVER : 192.168.1.130<br \/>\nSTANDBY DB SERVER : 192.168.1.14<br \/>\nWITNESS SERVER : 192.168.1.20<\/em><\/p>\n<p>For the cluster structure, three servers must communicate with each other.<\/p>\n<h4>To Do On Primary Server<\/h4>\n<p>1. We add the following lines to the pg_hba.conf file and then restart the service.<\/p>\n<pre class=\"lang:default decode:true \">$ vi \/var\/lib\/edb\/as13\/data\/pg_hba.conf\r\n#for efm\r\nhost  all   all  192.168.1.130\/32   md5\r\nhost  all   all  192.168.1.14\/32    md5\r\nhost  all   all  192.168.1.20\/32    md5\r\n$[root@testdb]# systemctl restart edb-as-13<\/pre>\n<p>2. We load EFM.<\/p>\n<pre class=\"lang:default decode:true \">[root@testdb ~]# yum install edb-efm42\r\n<\/pre>\n<p>3. The database user&#8217;s password is encrypted. Since I will be using the enterprisedb user, I will write his password.<\/p>\n<pre class=\"lang:default decode:true \">-bash-4.2$ \/usr\/edb\/efm-4.2\/bin\/efm encrypt efm\r\nThis utility will generate an encrypted password for you to place in your\r\nEFM cluster property file: \/etc\/edb\/efm-4.2\/efm.properties\r\n\r\nPlease enter the password and hit enter: --Enter the enterprisedb user password.\r\n\r\nPlease enter the password again to confirm:\r\n\r\nThe encrypted password is: bc3ebd41e84e67787877b16bdfeae3f5\r\n\r\nPlease paste this into your efm.properties file\r\n        db.password.encrypted=bc3ebd41e84e67787877b16bdfeae3f5<\/pre>\n<p>4. We copy files and grant necessary authorizations.<\/p>\n<pre class=\"lang:default decode:true \">[root@testdb ~]# cd \/etc\/edb\/efm-4.2\r\n[root@testdb efm-4.2]# cp efm.properties.in efm.properties\r\n[root@testdb efm-4.2]# cp efm.nodes.in efm.nodes\r\n[root@testdb efm-4.2]# chmod 666 efm.properties\r\n[root@testdb efm-4.2]# chmod 666 efm.nodes<\/pre>\n<p>5. The efm.properties file is updated.<\/p>\n<pre class=\"lang:default decode:true \">[root@testdb efm-4.2]# vi efm.properties\r\ndb.user=enterprisedb\r\ndb.password.encrypted=bc3ebd41e84e67787877b16bdfeae3f5\r\ndb.port=5444\r\ndb.database=edb\r\ndb.service.owner=enterprisedb\r\ndb.service.name=\r\ndb.bin=\/usr\/edb\/as13\/bin\r\ndb.data.dir=\/var\/lib\/edb\/as13\/data\r\ndb.config.dir=\/var\/lib\/edb\/as13\/data\r\nuser.email=&lt;mail&gt;\r\nbind.address=192.168.1.130:7800\r\nadmin.port=7809\r\nis.witness=false\r\nping.server.ip=192.168.1.20\r\nefm.loglevel=INFO<\/pre>\n<p>6. We start the EFM service.<\/p>\n<pre class=\"lang:default decode:true \">[root@testdb]# systemctl start edb-efm-4.2.service\r\n<\/pre>\n<p>7. We add Allow node to standby and witness strings.<\/p>\n<pre class=\"lang:default decode:true \">[root@testdb]# \/usr\/edb\/efm-4.2\/bin\/efm allow-node efm 192.168.1.14\r\n[root@testdb]# \/usr\/edb\/efm-4.2\/bin\/efm allow-node efm 192.168.1.20<\/pre>\n<p>8. We enter the standby and witness server ips in the efm.nodes file.<\/p>\n<pre class=\"lang:default decode:true \">[root@testdb efm-4.2]# vi efm.nodes\r\n# List of node address:port combinations separated by whitespace.\r\n# The list should include at least the membership coordinator s address.\r\n192.168.1.20:7800 192.168.1.14:7800<\/pre>\n<h4>To Do On Standby Server<\/h4>\n<p>1. We add the following lines to the pg_hba.conf file and then restart the service.<\/p>\n<pre class=\"lang:default decode:true \">$ vi \/var\/lib\/edb\/as13\/data\/pg_hba.conf\r\n#for efm\r\nhost  all   all  192.168.1.130\/32   md5\r\nhost  all   all  192.168.1.14\/32    md5\r\nhost  all   all  192.168.1.20\/32    md5\r\n$[root@testdb]# systemctl restart edb-as-13<\/pre>\n<p>2. We load EFM.<\/p>\n<pre class=\"lang:default decode:true \">[root@testdb ~]# yum install edb-efm42\r\n<\/pre>\n<p>3. We copy files and grant necessary authorizations.<\/p>\n<pre class=\"lang:default decode:true \">[root@testdb ~]# cd \/etc\/edb\/efm-4.2\r\n[root@testdb efm-4.2]# cp efm.properties.in efm.properties\r\n[root@testdb efm-4.2]# cp efm.nodes.in efm.nodes\r\n[root@testdb efm-4.2]# chmod 666 efm.properties\r\n[root@testdb efm-4.2]# chmod 666 efm.nodes<\/pre>\n<p>4. We update the efm.properties file.<\/p>\n<pre class=\"lang:default decode:true \">[root@testdb efm-4.2]# vi efm.properties\r\ndb.user=enterprisedb\r\ndb.password.encrypted=bc3ebd41e84e67787877b16bdfeae3f5\r\ndb.port=5444\r\ndb.database=edb\r\ndb.service.owner=enterprisedb\r\ndb.service.name=\r\ndb.bin=\/usr\/edb\/as13\/bin\r\ndb.data.dir=\/var\/lib\/edb\/as13\/data\r\ndb.config.dir=\/var\/lib\/edb\/as13\/data\r\nuser.email=&lt;mail&gt;\r\nbind.address=192.168.1.14:7800\r\nadmin.port=7809\r\nis.witness=false\r\nping.server.ip=192.168.1.20\r\nefm.loglevel=INFO<\/pre>\n<p>5. We enter the primary and witness server ips in the efm.nodes file.<\/p>\n<pre class=\"lang:default decode:true \">[root@testdb efm-4.2]# vi efm.nodes\r\n# List of node address:port combinations separated by whitespace.\r\n# The list should include at least the membership coordinator s address.\r\n192.168.1.20:7800 192.168.1.130:7800<\/pre>\n<p>6. We start the EFM service.<\/p>\n<pre class=\"lang:default decode:true \">[root@testdb]# systemctl start edb-efm-4.2.service\r\n<\/pre>\n<h4>What To Do On The Witness Server<\/h4>\n<p>1. Add the following lines to the pg_hba.conf file and then restart the service.<\/p>\n<pre class=\"lang:default decode:true \">$ vi \/var\/lib\/edb\/as13\/data\/pg_hba.conf\r\n#for efm\r\nhost  all   all  192.168.1.130\/32   md5\r\nhost  all   all  192.168.1.14\/32    md5\r\nhost  all   all  192.168.1.20\/32    md5\r\n$[root@testdb]# systemctl restart edb-as-13<\/pre>\n<p>2. We load EFM.<\/p>\n<pre class=\"lang:default decode:true \">[root@testdb ~]# yum install edb-efm42\r\n<\/pre>\n<p>3. We copy files and grant necessary authorizations.<\/p>\n<pre class=\"lang:default decode:true \">[root@testdb ~]# cd \/etc\/edb\/efm-4.2\r\n[root@testdb efm-4.2]# cp efm.properties.in efm.properties\r\n[root@testdb efm-4.2]# cp efm.nodes.in efm.nodes\r\n[root@testdb efm-4.2]# chmod 666 efm.properties\r\n[root@testdb efm-4.2]# chmod 666 efm.nodes\r\n<\/pre>\n<p>4. We update the efm.properties file.<\/p>\n<pre class=\"lang:default decode:true \">[root@testdb efm-4.2]# vi efm.properties\r\ndb.user=enterprisedb\r\ndb.password.encrypted=bc3ebd41e84e67787877b16bdfeae3f5\r\ndb.port=5444\r\ndb.database=edb\r\ndb.service.owner=enterprisedb\r\ndb.service.name=\r\ndb.bin=\/usr\/edb\/as13\/bin\r\ndb.data.dir=\/var\/lib\/edb\/as13\/data\r\ndb.config.dir=\/var\/lib\/edb\/as13\/data\r\nuser.email=&lt;mail&gt;\r\nbind.address=192.168.1.20:7800\r\nadmin.port=7809\r\nis.witness=true\r\nping.server.ip=192.168.1.20\r\nefm.loglevel=INFO<\/pre>\n<p>5. We enter the primary and standby server IPs in the efm.nodes file.<\/p>\n<pre class=\"lang:default decode:true \">[root@testdb efm-4.2]# vi efm.nodes\r\n# List of node address:port combinations separated by whitespace.\r\n# The list should include at least the membership coordinator s address.\r\n192.168.1.130:7800 192.168.1.14:7800<\/pre>\n<p>6. We start the EFM service.<\/p>\n<pre class=\"lang:default decode:true \">[root@testdb]# systemctl start edb-efm-4.2.service\r\n<\/pre>\n<p>After the necessary steps are taken on all three servers, we check the EFM service status with the following command.<\/p>\n<pre class=\"lang:default decode:true \">[root@testdb]# \/usr\/edb\/efm-4.2\/bin\/efm cluster-status efm\r\nCluster Status: efm\r\nAgent Type  Address              DB       VIP\r\n   ----------------------------------------------------------------\r\n        Primary     192.168.1.130        UP        \r\n        Standby     192.168.1.14         UP        \r\n        Witness     192.168.1.20         N\/A\r\nAllowed node host list:\r\n        192.168.1.130 192.168.1.14 192.168.1.20\r\nMembership coordinator: 192.168.1.130\r\nStandby priority host list:\r\n        192.168.1.14\r\nPromote Status:\r\nDB Type     Address              WAL Received LSN   WAL Replayed LSN   Info\r\n--------------------------------------------------------------------\r\n        Primary     192.168.1.130                           0\/100001C0         \r\n        Standby     192.168.1.14         0\/10000000         0\/100001C0\r\nStandby database(s) in sync with primary. It is safe to promote.<\/pre>\n<p>I hope it has been a useful document for you.<\/p>\n<div class=\"pvc_clear\"><\/div>\n<p id=\"pvc_stats_41297\" class=\"pvc_stats all  \" data-element-id=\"41297\" style=\"\"><i class=\"pvc-stats-icon medium\" aria-hidden=\"true\"><svg aria-hidden=\"true\" focusable=\"false\" data-prefix=\"far\" data-icon=\"chart-bar\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\" class=\"svg-inline--fa fa-chart-bar fa-w-16 fa-2x\"><path fill=\"currentColor\" d=\"M396.8 352h22.4c6.4 0 12.8-6.4 12.8-12.8V108.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v230.4c0 6.4 6.4 12.8 12.8 12.8zm-192 0h22.4c6.4 0 12.8-6.4 12.8-12.8V140.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v198.4c0 6.4 6.4 12.8 12.8 12.8zm96 0h22.4c6.4 0 12.8-6.4 12.8-12.8V204.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v134.4c0 6.4 6.4 12.8 12.8 12.8zM496 400H48V80c0-8.84-7.16-16-16-16H16C7.16 64 0 71.16 0 80v336c0 17.67 14.33 32 32 32h464c8.84 0 16-7.16 16-16v-16c0-8.84-7.16-16-16-16zm-387.2-48h22.4c6.4 0 12.8-6.4 12.8-12.8v-70.4c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v70.4c0 6.4 6.4 12.8 12.8 12.8z\" class=\"\"><\/path><\/svg><\/i> <img loading=\"lazy\" decoding=\"async\" width=\"16\" height=\"16\" alt=\"Loading\" src=\"https:\/\/dbtut.com\/wp-content\/plugins\/page-views-count\/ajax-loader-2x.gif\" border=0 \/><\/p>\n<div class=\"pvc_clear\"><\/div>\n","protected":false},"excerpt":{"rendered":"<p>In this article, I will tell you about the Download EDB Failover Manager. The EFM cluster consists of: 1. An active primary server where transactions take place. 2. One or more standby databases. 3. Witness server assists efm cluster in decision making during primary or standby failover scenario. However, if there is more than one &hellip;<\/p>\n<div class=\"pvc_clear\"><\/div>\n<p id=\"pvc_stats_41297\" class=\"pvc_stats all  \" data-element-id=\"41297\" style=\"\"><i class=\"pvc-stats-icon medium\" aria-hidden=\"true\"><svg aria-hidden=\"true\" focusable=\"false\" data-prefix=\"far\" data-icon=\"chart-bar\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\" class=\"svg-inline--fa fa-chart-bar fa-w-16 fa-2x\"><path fill=\"currentColor\" d=\"M396.8 352h22.4c6.4 0 12.8-6.4 12.8-12.8V108.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v230.4c0 6.4 6.4 12.8 12.8 12.8zm-192 0h22.4c6.4 0 12.8-6.4 12.8-12.8V140.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v198.4c0 6.4 6.4 12.8 12.8 12.8zm96 0h22.4c6.4 0 12.8-6.4 12.8-12.8V204.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v134.4c0 6.4 6.4 12.8 12.8 12.8zM496 400H48V80c0-8.84-7.16-16-16-16H16C7.16 64 0 71.16 0 80v336c0 17.67 14.33 32 32 32h464c8.84 0 16-7.16 16-16v-16c0-8.84-7.16-16-16-16zm-387.2-48h22.4c6.4 0 12.8-6.4 12.8-12.8v-70.4c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v70.4c0 6.4 6.4 12.8 12.8 12.8z\" class=\"\"><\/path><\/svg><\/i> <img loading=\"lazy\" decoding=\"async\" width=\"16\" height=\"16\" alt=\"Loading\" src=\"https:\/\/dbtut.com\/wp-content\/plugins\/page-views-count\/ajax-loader-2x.gif\" border=0 \/><\/p>\n<div class=\"pvc_clear\"><\/div>\n","protected":false},"author":3068,"featured_media":41298,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-41297","post","type-post","status-publish","format-standard","has-post-thumbnail","","category-oracle"],"aioseo_notices":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Download EDB Failover Manager - Database Tutorials<\/title>\n<meta name=\"description\" content=\"In this article, I will tell you about the Download EDB Failover Manager. 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