This is my third round of Guru Labs training and I am really enjoying their instructors and course material. This course is for their Gluster Storage Administration class. I am really curious about glusterfs especially how it stacks up against the bohemyth ZFS. Also our class is the first class to take the glusterfs training….
Install pcp-webapi and pcp-webjs on RHEL 7
This write-up details the process of connecting your RHEL 7 server to the rhel-7-server-optional-rpms channel, installing and enabling pcp-webapi and pcp-webjs the software required to install and run the Performance Co Pilot web interface. Step 1: Connect Server to rhel-7-server-optional-rpms Channel
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subscription-manager repos --enable rhel-7-server-optional-rpms |
Example Output
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Repository 'rhel-7-server-optional-rpms' is enabled for this system. |
Step 2: Install pcp-webapi and pcp-webjs
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yum install pcp-webapi pcp-webjs -y |
Example Output
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Installed: pcp-webapi.x86_64 0:3.10.6-2.el7 pcp-webjs.noarch 0:3.10.6-2.el7 Dependency Installed: libmicrohttpd.x86_64 0:0.9.33-2.el7 pcp-webapp-grafana.noarch 0:3.10.6-2.el7 pcp-webapp-graphite.noarch 0:3.10.6-2.el7 pcp-webapp-vector.noarch 0:3.10.6-2.el7 Complete! |
…
Add Debuginfo Channels to Red Hat Developer Subscription
This details the process for subscribing to an debug software channel when you are part of the Red Hat Developer Network Subscription service. Step 1: List Currently Subscribed Repos The yum repolist command will list all the repos that you are currently subscribed to.
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yum repolist |
Example Output
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Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-manager repo id repo name status rhel-7-server-eus-rpms/7Server/x86_64 Red Hat Enterprise Linux 7 Server - Extended Update Suppo 11,232 rhel-7-server-rpms/7Server/x86_64 Red Hat Enterprise Linux 7 Server (RPMs) 11,241 rhel-7-server-rt-rpms/7Server/x86_64 Red Hat Enterprise Linux for Real Time (RHEL 7 Server) (R 129 rhel-ha-for-rhel-7-server-eus-rpms/7Server/x86_64 Red Hat Enterprise Linux High Availability (for RHEL 7 Se 224 rhel-ha-for-rhel-7-server-rpms/7Server/x86_64 Red Hat Enterprise Linux High Availability (for RHEL 7 Se 224 rhel-rs-for-rhel-7-server-eus-rpms/7Server/x86_64 Red Hat Enterprise Linux Resilient Storage (for RHEL 7 Se 279 rhel-rs-for-rhel-7-server-rpms/7Server/x86_64 Red Hat Enterprise Linux Resilient Storage (for RHEL 7 Se 279 repolist: 23,608 |
Step 2: List All Available Debug Repositories…
How to Remove mdadm RAID Devices
Step 1: Unmount and Remove all Filesystems Use umount, lvremove and vgremove to make sure all filesystems have been unmounted and you have exclusive access to the disk. Removing an Logical Volume
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lvremove /dev/2tbdatavg/install-images |
Example Output
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Do you really want to remove active logical volume install-images? [y/n]: y Logical volume "install-images" successfully removed |
Removing an Volume Group
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vgremove 2tbdatavg |
Example Output
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Volume group "2tbdatavg" successfully removed |
Step 2: Determine mdadm RAID Devices
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cat /proc/mdstat |
Example Output
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md1 : active raid1 sdf1[1] sde1[0] 2929555456 blocks super 1.2 [2/2] [UU] bitmap: 0/22 pages [0KB], 65536KB chunk md0 : active raid10 sda1[3] sdd1[1] sdb1[0] sdc1[2] 976502784 blocks super 1.2 512K chunks 2 near-copies [4/4] [UUUU] unused devices: <none> |
Be…
Guru Labs GL645 Course Review
Course Title RHEL Clustering and Storage Management on RHEL 6 Course Links Link to official Guru Labs Course here. Link to official Red Hat Course here. Prerequisites This course is not for beginners. See my recommended credentials below. Passed the RHCSA exam or 2 years of hands on RHEL experience Have some experience managing storage…
Red Hat Training GL325 Linux Performance Tuning on RHEL 6
Round 2 of Red Hat training with Guru Labs. My fist experience with Guru Labs was pretty good. As I stated before its not about the company that provides the training but the knowledge and experience of the trainer that matters. Link to Official Guru Labs GL325 Course.
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