\n$ systemctl -l | grep temboard | grep -v system- | awk '{ print $1 }' | while read i\n do\n sudo systemctl stop $i\n done\n\n<\/pre>\nUpdate the rpm package<\/h3>\n
Note: On RHEL 7 – Some python 3 components might be installed as well, depending if they are already installed or not<\/p>\n
\n$ sudo yum -y localupdate --disableexcludes=main temboard-agent-7.10-1.el7.noarch.rpm\n\n<\/pre>\nAdjust the temBoard agent systemd service<\/h3>\n
Setting the Environment=”LD_LIBRARY_PATH=\/app\/lib\/postgres\/pgproduct\/pg-12.10\/lib” variable in the systemd file is a quite important step. By doing so, you can make sure that you can use the latest libpq features.<\/p>\n
\n$ sudo vi \/usr\/lib\/systemd\/system\/temboard-agent@.service\n\n$ cat \/usr\/lib\/systemd\/system\/temboard-agent@.service\n\n[Unit]\nDescription=PostgreSQL Remote Control Agent %I\nAfter=network.target postgresql@%i.service\nAssertPathExists=\/etc\/temboard-agent\/%I\/temboard-agent.conf\n\n[Service]\nType=simple\nUser=postgres\nGroup=postgres\nEnvironment="LD_LIBRARY_PATH=\/app\/lib\/postgres\/pgproduct\/pg-12.10\/lib"\nExecStart=\/usr\/bin\/env SYSTEMD=1 temboard-agent -c \/etc\/temboard-agent\/%I\/temboard-agent.conf\n\n[Install]\nWantedBy=multi-user.target\n\n\n$ sudo systemctl daemon-reload\n\n<\/pre>\nAdjust the temBoard agent monitoring\/probes.py file<\/h3>\n
There is a missing comma after upstream. Correct the probes.py file (Missing Comma), so that the SQL is executed correctly.<\/p>\n
\n\n$ sudo vi \/usr\/lib\/python3.6\/site-packages\/temboardagent\/plugins\/monitoring\/probes.py\n\n-- search for upstream\n\nSELECT '{p_host}' AS upstream, <- This comma after upstream is missing\nCASE \n WHEN COUNT(*) > 0 THEN 1 \n ELSE 0 \nEND AS connected\nFROM pg_stat_wal_receiver\nWHERE status='streaming' AND\nconninfo LIKE '%host={p_host}%';\n<\/pre>\nStart all agents<\/h3>\n
For starting all agents, I use the following script. It has a little sleep built-in, so that not all agents are firing at the same time.<\/p>\n
\n\n$ \/app\/lib\/postgres\/pgbase\/local\/bin\/restart-agents.sh\n\n#!\/bin\/bash -eu\n#------------------------------------------------------------------------------------------------------------------------#\n#-- Author: William Sescu\n#--\n#-- Purpose: Restart Temboard Agents\n#--\n#--\n#--\n#--\n#-- History:\n#-- Date Version Who What\n#-- 26.09.2019 Version: 0.1 SW0 Created initial version\n#-- 10.10.2019 Version: 0.2 SW0 Rewrote Restart Agent Procedure\n#-- 14.02.2020 Version: 0.3 SW0 Added sleep 3, so that the agents are not fired at the same time\n#--\n#------------------------------------------------------------------------------------------------------------------------#\n#-- Debugging\n\n# set -x\n\n#------------------------------------------------------------------------------------------------------------------------#\n\n\nif ! hash sudo systemctl &>\/dev\/null; then\n echo "ERROR: You must restart manually temboard-agent services" >&2\n exit 0\nfi\n\necho "INFO: Running systemctl reset-failed and daemon-reload"\nsudo systemctl reset-failed\nsudo systemctl daemon-reload\nsudo systemctl is-system-running\n\nif ! sudo systemctl is-system-running &>\/dev\/null ; then\n echo "ERROR: You must restart manually temboard-agent services" >&2\n echo "ERROR: Check with sudo systemctl list-units --state=failed"\n echo "ERROR: Correct it, and run afterwards sudo systemctl reset-failed"\n exit 0\nfi\n\n\n#------------------------------------------------------------------------------------------------------------------------#\n\nprefix=temboard-agent@\n\n# search for files in the \/etc\/systemd\/ directory\n\necho "INFO: Search for temboard-agent files in the \/etc\/systemd\/ directory"\nsudo find \/etc\/systemd\/system\/multi-user.target.wants\/ -name "${prefix}*"\n\nactive_units="$(sudo systemctl --all --plain list-units ${prefix}* | grep -Po ${prefix}.*\\\\.service ||:)"\n\nif [ -z "${active_units}" ] ; then\n echo "ERROR: No units found for temboard-agent" >&2\n exit 0;\nfi\n\nexit_code=0\nfor unit in ${active_units} ; do\n echo "INFO: Restarting $unit" >&2\n sudo systemctl stop $unit\n sleep 3\n sudo systemctl start $unit\n # if ! sudo systemctl restart $unit ; then\n # echo "ERROR: Failed to restart $unit" >&2\n # exit_code=1\n # fi\ndone\n\nexit $exit_code\n\n#------------------------------------------------------------------------------------------------------------------------#\n\n<\/pre>\nCheck that the agent has loaded the correct libpq<\/h3>\n
Red Hat 7.x comes with a quite old version per default (libpq 9.2.24), however, if you want to use all features, you need to make sure, that the systemd service shows “INFO: Using libpq 12.10”<\/p>\n
\n$ temboard-agent --version\n INFO: Starting temboard-agent 7.10.\ntemBoard agent 7.10\nSystem Red Hat Enterprise Linux Server 7.9 (Maipo)\nPython 3.6.8 (\/usr\/bin\/python3)\npsycopg2 2.7.7 (dt dec pq3 ext) libpq 9.2.24 <-- this is the old libpq\n\n$ sudo systemctl status temboard-agent@12-pg55007.service\n\u25cf temboard-agent@12-pg55007.service - PostgreSQL Remote Control Agent 12\/pg55007\n Loaded: loaded (\/usr\/lib\/systemd\/system\/temboard-agent@.service; enabled; vendor preset: disabled)\n Active: active (running) since Fri 2022-03-04 07:44:12 CET; 2s ago\n Main PID: 6928 (temboard-agent)\n CGroup: \/system.slice\/system-temboard\\x2dagent.slice\/temboard-agent@12-pg55007.service\n \u251c\u25006928 temboard-agent: 12\/pg55007: main process\n \u251c\u25006947 temboard-agent: 12\/pg55007: worker pool\n \u2514\u25006948 temboard-agent: 12\/pg55007: scheduler\n\nMar 04 07:44:12 host01 systemd[1]: Started PostgreSQL Remote Control Agent 12\/pg55007.\nMar 04 07:44:13 host01 env[6928]: INFO: Starting temboard-agent 7.10.\nMar 04 07:44:13 host01 env[6928]: INFO: Running on Red Hat Enterprise Linux Server 7.9 (Maipo).\nMar 04 07:44:13 host01 env[6928]: INFO: Using Python 3.6.8 (\/usr\/bin\/python3).\nMar 04 07:44:13 host01 env[6928]: INFO: Using libpq 12.10, Psycopg2 2.7.7 (dt dec pq3 ext). <-- this is the new libpq\n\n<\/pre>\nConclusion<\/h3>\n
Upgrading the temBoard agent looks like an easy step. However, if you want to use its full potential you might want to switch to a more recent libpq version. In regards to the issue with the typo in the SQL statements. That one should be fixed in the next temBoard agent release.<\/p>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
8 days ago, Dalibo released temBoard version 7.10, and I wanted to take this opportunity to show you how to upgrade the temBoard Agent to version 7.10.\u00a0 You might think that simply running a yum localupdate will be enough, however, in case you want to unleash the full potential you need to do a few […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"","ocean_second_sidebar":"","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"","ocean_custom_header_template":"","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"","ocean_menu_typo_font_family":"","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"","ocean_post_oembed":"","ocean_post_self_hosted_media":"","ocean_post_video_embed":"","ocean_link_format":"","ocean_link_format_target":"self","ocean_quote_format":"","ocean_quote_format_link":"post","ocean_gallery_link_images":"on","ocean_gallery_id":[],"footnotes":""},"categories":[6],"tags":[17,21,24],"class_list":["post-330","post","type-post","status-publish","format-standard","hentry","category-postgresql","tag-monitoring","tag-postgresql","tag-temboard","entry"],"yoast_head":"\n
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