What's the equivalent service for dmmonitor in CentOS 7?
I found dmmonitor doesn't exists in Centos7, I assume mdmon is the equivalent but I 'm not sure...
Thanks
Comments
-
Hi @nicolasmendoza ,
Are you talking about Multipathing? Because I couldn't find any "dmmonitor" tool. Is that the right command name?
In case you refers to Multipathing, you can search for "device-mapper-multipath.x86_64" on CentOS 7.Regards,
Luis.1 -
we don't know what you are talking about. Googling on dmmonitor takes me to Windows documentation on data bases. There is no such tool in LInux AFAIK.
1 -
I think "mdmonitor" is the name of service...
Sorry for the typo.0 -
sudo systemctl [start/stop/restart/enable/disable] mdmonitor.service
It is now a systemd service in RHEL 8 and RHEL 7. RHEL 8 does not seem to have /etc/mdadm.conf.
To be honest I haven't used software raid for ages (the hardware raid is better as is mentioned in the course and have thought about eliminating this section.) We will have to go back and see what if anything needs modifcation in the course to make the lab work etc.
Next time please correct your typo faster as several of us went down the rabbit hole. Telling us exactly what section it referred to would have helped.
1 -
Thanks, I appreciate to learn about your experience with RAID.
Yes, i will try to review better my questions before post.1 -
A little note on Chapter 24 / RAID and Ubuntu:
You mention that "on Ubuntu systems, the service is called mdadm rather than mdmonitor."
Here is what I get on a Ubuntu 18.04 system:
$ sudo systemctl start mdadm Failed to start mdadm.service: Unit mdadm.service is masked. $ sudo systemctl status mdadm ● mdadm.service Loaded: masked (/dev/null; bad) Active: inactive (dead)
However, mdmonitor works like a champ:
$ sudo systemctl start mdmonitor.service $ sudo systemctl status mdmonitor.service ● mdmonitor.service - MD array monitor Loaded: loaded (/lib/systemd/system/mdmonitor.service; static; vendor preset: Active: active (running) since Tue 2020-10-06 12:34:25 IDT; 7s ago Main PID: 3518 (mdadm) Tasks: 1 (limit: 4915) CGroup: /system.slice/mdmonitor.service └─3518 /sbin/mdadm --monitor --scan Oct 06 12:34:25 worker4 systemd[1]: Started MD array monitor.
It seems to execute mdadm --monitor --scan, though.
About deleting the chapter, the less we need to study, the better . But unfortunately in real life we could learn a tough lesson when implementing hardware RAID and not purchasing enough spare controllers. mdadm always works. That's the beauty of Linux.
1 -
Hi @heiko_s ,
About deleting the chapter, the less we need to study, the better . But unfortunately in real life we could learn a tough lesson when implementing hardware RAID and not purchasing enough spare controllers. mdadm always works. That's the beauty of Linux.
Yes, it might be beautiful, hehehe. But it's not all honey and flakes, as the maintenance and repair of a software RAID could get large more complex than hardware RAID.
Many regard,
Luis.0
Categories
- All Categories
- 219 LFX Mentorship
- 219 LFX Mentorship: Linux Kernel
- 793 Linux Foundation IT Professional Programs
- 354 Cloud Engineer IT Professional Program
- 179 Advanced Cloud Engineer IT Professional Program
- 82 DevOps Engineer IT Professional Program
- 147 Cloud Native Developer IT Professional Program
- 138 Express Training Courses
- 138 Express Courses - Discussion Forum
- 6.2K Training Courses
- 47 LFC110 Class Forum - Discontinued
- 71 LFC131 Class Forum
- 42 LFD102 Class Forum
- 227 LFD103 Class Forum
- 19 LFD110 Class Forum
- 38 LFD121 Class Forum
- 18 LFD133 Class Forum
- 7 LFD134 Class Forum
- 18 LFD137 Class Forum
- 71 LFD201 Class Forum
- 5 LFD210 Class Forum
- 5 LFD210-CN Class Forum
- 2 LFD213 Class Forum - Discontinued
- 128 LFD232 Class Forum - Discontinued
- 2 LFD233 Class Forum
- 4 LFD237 Class Forum
- 24 LFD254 Class Forum
- 697 LFD259 Class Forum
- 111 LFD272 Class Forum
- 4 LFD272-JP クラス フォーラム
- 12 LFD273 Class Forum
- 151 LFS101 Class Forum
- 1 LFS111 Class Forum
- 3 LFS112 Class Forum
- 2 LFS116 Class Forum
- 4 LFS118 Class Forum
- LFS120 Class Forum
- 7 LFS142 Class Forum
- 5 LFS144 Class Forum
- 4 LFS145 Class Forum
- 3 LFS146 Class Forum
- 3 LFS147 Class Forum
- 1 LFS148 Class Forum
- 15 LFS151 Class Forum
- 2 LFS157 Class Forum
- 30 LFS158 Class Forum
- 7 LFS162 Class Forum
- 2 LFS166 Class Forum
- 4 LFS167 Class Forum
- 3 LFS170 Class Forum
- 2 LFS171 Class Forum
- 3 LFS178 Class Forum
- 3 LFS180 Class Forum
- 2 LFS182 Class Forum
- 5 LFS183 Class Forum
- 32 LFS200 Class Forum
- 737 LFS201 Class Forum - Discontinued
- 3 LFS201-JP クラス フォーラム
- 18 LFS203 Class Forum
- 134 LFS207 Class Forum
- 2 LFS207-DE-Klassenforum
- 1 LFS207-JP クラス フォーラム
- 302 LFS211 Class Forum
- 56 LFS216 Class Forum
- 52 LFS241 Class Forum
- 48 LFS242 Class Forum
- 38 LFS243 Class Forum
- 15 LFS244 Class Forum
- 2 LFS245 Class Forum
- LFS246 Class Forum
- 49 LFS250 Class Forum
- 2 LFS250-JP クラス フォーラム
- 1 LFS251 Class Forum
- 153 LFS253 Class Forum
- 1 LFS254 Class Forum
- 1 LFS255 Class Forum
- 9 LFS256 Class Forum
- 1 LFS257 Class Forum
- 1.3K LFS258 Class Forum
- 10 LFS258-JP クラス フォーラム
- 119 LFS260 Class Forum
- 159 LFS261 Class Forum
- 42 LFS262 Class Forum
- 82 LFS263 Class Forum - Discontinued
- 15 LFS264 Class Forum - Discontinued
- 11 LFS266 Class Forum - Discontinued
- 24 LFS267 Class Forum
- 24 LFS268 Class Forum
- 30 LFS269 Class Forum
- LFS270 Class Forum
- 202 LFS272 Class Forum
- 2 LFS272-JP クラス フォーラム
- 1 LFS274 Class Forum
- 4 LFS281 Class Forum
- 9 LFW111 Class Forum
- 259 LFW211 Class Forum
- 181 LFW212 Class Forum
- 13 SKF100 Class Forum
- 1 SKF200 Class Forum
- 1 SKF201 Class Forum
- 796 Hardware
- 199 Drivers
- 68 I/O Devices
- 37 Monitors
- 103 Multimedia
- 174 Networking
- 91 Printers & Scanners
- 85 Storage
- 758 Linux Distributions
- 82 Debian
- 67 Fedora
- 17 Linux Mint
- 13 Mageia
- 23 openSUSE
- 148 Red Hat Enterprise
- 31 Slackware
- 13 SUSE Enterprise
- 353 Ubuntu
- 468 Linux System Administration
- 39 Cloud Computing
- 71 Command Line/Scripting
- Github systems admin projects
- 93 Linux Security
- 78 Network Management
- 102 System Management
- 47 Web Management
- 63 Mobile Computing
- 18 Android
- 33 Development
- 1.2K New to Linux
- 1K Getting Started with Linux
- 371 Off Topic
- 114 Introductions
- 174 Small Talk
- 22 Study Material
- 805 Programming and Development
- 303 Kernel Development
- 484 Software Development
- 1.8K Software
- 263 Applications
- 183 Command Line
- 3 Compiling/Installing
- 987 Games
- 317 Installation
- 97 All In Program
- 97 All In Forum
Upcoming Training
-
August 20, 2018
Kubernetes Administration (LFS458)
-
August 20, 2018
Linux System Administration (LFS301)
-
August 27, 2018
Open Source Virtualization (LFS462)
-
August 27, 2018
Linux Kernel Debugging and Security (LFD440)