So you want to replace a GlustetFS brick? In other words, how do I rename a brick path in glusterfs? NOTICE: Anytime there is any data manipulation on any environment, backups should always be taken.  So please make a copy or a backup of your files prior to executing any of the commands.  The steps […]

Getting this? Got permission denied while trying to connect to the Docker daemon socket Solve it with this: sudo chmod 666 /var/run/docker.sock Cheers, Tom

To add a cname record:  ipa dnsrecord-add nix.mds.xyz portal –cname-rec='long-host01.nix.mds.xyz.' to remove a cname record:  ipa dnsrecord-del nix.mds.xyz portal –cname-rec='long-host01.nix.mds.xyz.' Cheers, TK

Seeing the following alerts? [2020-04-17 21:53:30,207] 2020-04-18T01:53:30.200Z Component 'Operating System' alerted 'Low free memory' (details: {"freeInMegabytes":62,"totalInMegabytes":5805,"minimumInMegabytes":256}, trigger: {"pluginKey": "not-detected"}) [2021-12-13 06:44:52,432] 2021-12-13T11:44:48.953Z Component ‘Java’ alerted ‘Garbage collection exceeded time limit’ (details: {“durationInMillis”:2181,”windowInMillis”:20000,”limitPercent”:10,”threadMemoryAllocations”:””,”threadDump”:[]}, trigger: {"pluginKey": "not-detected"}) Time to up the memory on the host and adjust the environment properties: /atlas/atlassian/confluence/ cat bin/setenv.sh # See the CATALINA_OPTS below […]

MySQL Galera while using HAProxy gives the following: # Dec 11 22:45:43 localhost haproxy[24265]: Proxy mysql-back started. Dec 11 22:45:43 localhost haproxy[24265]: Server mysql-back/mysql01.nix.mds.xyz is DOWN, reason: Layer4 connection problem, info: "Connection refused", check duration: 0ms. 2 active and 0 backup servers left. 0 sessions active, 0 requeued, 0 remaining in queue. Dec 11 22:45:43 […]

So it became apparent that, while sitting on a GlusterFS on two of my nodes, Confluence was dumping 18GB of logs to catalina.out. Unfortunately, there isn't a good way to rotate that file: https://confluence.atlassian.com/confkb/catalina-logs-are-not-rotated-or-removed-289276264.html All the while writing to the GlusterFS, which by itself network copies this to the secondary host, atlas01: atlas02 # du […]

Seeing timed out accessing external and internal VLAN's after connecting to the OpenVPN server? Reply from 98.136.103.23: bytes=32 time=673ms TTL=47 Request timed out. Request timed out. Reply from 10.3.0.100: bytes=32 time=673ms TTL=47 Request timed out. Request timed out. Moreover, also seeing timeout on accessing local VLAN's? root@DD-WRT-INTERNET-ASUS:~# tail -f /var/log/messages|grep -Ei "DROP"|grep -Ei "10.3.0.100" Nov […]

It indeed happened that the default GW provided on various network interfaces was the router that we do not want to be the GW.  In our case the OpenWRT Raspberry Pi 2 became the GW for any hosts dynamically getting an IP.  So all requests, were sent via the Raspberry Pi 2, which is not […]

OpenWRT links /etc/resolv.conf to /tmp/resolv.conf and only adjust entries in /tmp/resov.conf if $localuse is enabled in the UI: The above entered as text, is: DHCP and DNS -> [General Settings] -> [Local domain] : openwrt.mds.xyz mds.xyz nix.mds.xyz mws.mds.xyz DHCP and DNS -> [General Settings] -> Allow localhost : Yes DHCP and DNS -> [General Settings] -> Local Service […]

This use case scenario is aimed at those folks who are developing on their local environment and need to trust a set of certificates. This is so they are not always prompted for verification to a domain they know is already trusted and safe.  Despite that site having self signed certificates as is the case […]