Well RedHat has made it clear they’re going to enforce their horrible application NetworkManager for a role that has been fine for 25 years as some basic text files… so lets disable it one last time before EL9.
sudo dnf install -y network-scripts
sudo systemctl disable --now firewalld NetworkManager
sudo systemctl enable network && sudo systemctl start network
sudo touch /etc/sysconfig/disable-deprecation-warnings
Most us devops engineer nerds have to deal with old java versions for things like IPMI and network device configuration tools… New versions of Java literally refuse to work due to security issues… soooo I present to you.. a solution!
Once you’ve done that, simply open the jnlp file with “OpenWebStart” and it will just “work”. You may need to open the settings app for OpenWebStart and select the OpenJDK JVM over Horacle java.
These rules below will allow you to add Ipv6 to all of your instances.. by default openstack only allows ipv6 between the same security group.
openstack security group list
+--------------------------------------+---------+------------------------+----------------------------------+------+
| ID | Name | Description | Project | Tags |
+--------------------------------------+---------+------------------------+----------------------------------+------+
| 9817adcc-e504-479b-97e5-cc884c17d3dc | default | Default security group | 3d1f410104144004a65e74c7d8fa2612 | [] |
| a45b2351-331c-4a71-ab42-10f3f04364f6 | default | Default security group | 877dce1df8ea4f8ba6a28803ef40f0dd | [] |
| afe5f296-1971-49a9-9ef4-f6af98bd83f9 | default | Default security group | 26ef6bf16c1544699b6de2639f006950 | [] |
| def5f039-c5bc-4f0e-a2e0-3ffe537f9bee | default | Default security group | | [] |
| e38fe90f-70b1-4411-984b-ace5b6f04530 | default | Default security group | 776cf3cded7541419baeef3002ebf742 | [] |
+--------------------------------------+---------+------------------------+----------------------------------+------+
#Add the rules to the security group for project "776cf3cded7541419baeef3002ebf742"
openstack security group rule create --protocol ipv6-icmp --ingress e38fe90f-70b1-4411-984b-ace5b6f04530
openstack security group rule create --ethertype ipv6 --protocol tcp --ingress e38fe90f-70b1-4411-984b-ace5b6f04530
openstack security group rule create --ethertype ipv6 --protocol udp --ingress e38fe90f-70b1-4411-984b-ace5b6f04530I constantly switch between speakers and headset.. like 5-6 times per day for conference calls and such…. and changing the audio source was super annoying.. SO THIS BECAME A THING.
Automator:
Using MacOS “Automator” and “switchaudio-osx” from Brew I was able to automate switching to my logitech 533 headset automagically. I have this setup on a key binding for control+F13
The code:
on run {input, parameters}
set theSwitch to "/usr/local/Cellar/switchaudio-osx/1.0.0/SwitchAudioSource"
set theSource to do shell script theSwitch & " -c"
try
if theSource = "Built-in Output" then
do shell script theSwitch & " -t output -s \"G533 Gaming Headset\""
do shell script theSwitch & " -t input -s \"G533 Gaming Headset\""
display notification "Audio switched to G533 Headset." with title " Audio Input/Output Switcher"
else
do shell script theSwitch & " -t output -s \"Built-in Output\""
do shell script theSwitch & " -t input -s \"Built-in Microphone\""
display notification "Audio switched to Internal iMac Devices." with title " Audio Input/Output Switcher"
end if
end try
return input
end runYou’re welcome.
The CentOS kernel is really old… some hardware requires a newer kernel, like intel VROC requires kernel 4.15+ to work properly…
This guide assumes you’ve installed the kernels for the CentOS AltArch kernel repo: http://mirror.centos.org/altarch/7/kernel/x86_64/
#Download latest pxe kernel initramfs
wget http://mirror.centos.org/centos-7/7/os/x86_64/images/pxeboot/vmlinuz -O /tmp/pxeinitrd.img
#Make a directory
mkdir /tmp/pxeinitrd
cd /tmp/pxeinitrd
#Extract the kernel into the folder
/usr/lib/dracut/skipcpio /tmp/pxeinitrd.img | xzcat | cpio -idmv
#Remove the old kernel modules
rm -rf lib/modules/*
#Copy in the kernel modules from your new kernel, in this case its 4.19.84-300.x64_64 or CentOS AltArch
rsync -r /lib/modules/4.19.84-300.el7.x86_64/* lib/modules/4.19.84-300.el7.x86_64/
#Compile the ramdisk..
find . 2>/dev/null | cpio -c -o | xz -9 --format=lzma > /tmp/initrd.4.19.84-300.el7.x86_64.img
#Grab your files and stick em in your pxe directory
cp /tmp/initrd.4.19.84-300.el7.x86_64.img /var/lib/tftpboot/images/centos7/initrd.img
cp /boot/vmlinuz-4.19.84-300.el7.x86_64 /var/lib/tftpboot/images/centos7/vmlinuzNode dies? Put disk in another node and run this. Magic.
ceph-volume lvm activate --all
Just run this to reduce the write workload of your cluster… (this isn’t safe for critical data.. fine for logging ect.)
curl -XPUT 'http://127.0.0.1:9200/_all/_settings?preserve_existing=true' -d '{
"index.number_of_replicas" : "0",
"index.translog.durability" : "async",
"index.refresh_interval" : "60s"
}'
Default Password for EMC XtremIO:
XtremIO Management Server (XMS)
XtremIO Management Secure Upload
XtremIO Management Command Line Interface (XMCLI)
XtremIO Management Command Line Interface (XMCLI)
XtremIO Graphical User Interface (XtremIO GUI)
XtremIO Graphical User Interface (XtremIO GUI)
XtremIO Easy Installation Wizard (on storage controllers / nodes)
XtremIO Easy Installation Wizard (on XMS)
Basic Input/Output System (BIOS) for storage controllers / nodes
Basic Input/Output System (BIOS) for XMS
Objective
Prerequisites
Step 1 – Install the additional SSD drives into the X-Brick Chassis
Step 2 – Login to the XMS UI
Step 3 – Initialize each SSD and bring Online
# Is Rusting?
ACTION=="add|change", KERNEL=="sd[a-z]{1,3}", ATTR{queue/rotational}=="1", ATTR{queue/scheduler}="cfq"
# LSI SSD
ACTION==“add|change”, KERNEL==“sd[a-z]{1,3}“, ATTR{queue/rotational}==“0”, ATTR{queue/scheduler}=“noop”, ATTR{queue/nr_requests}=“975”, ATTR{device/queue_depth}=“975"
The documentation for this process absolutely sucks.. and the fact that no ones updated it (shame on me for even saying that about an opensource project that i can push a branch to…) is pitiful. So.. here’s some useful info for completing an image!
Useful post:
1: https://docs.openstack.org/trove/latest/admin/building_guest_images.html
2: https://ask.openstack.org/en/question/95078/how-do-i-build-a-trove-image/
yum install epel-release git -y
git clone https://git.openstack.org/openstack/diskimage-builder
yum install python2-pip
pip install -r requirements.txt
python setup.py install
Now we clone the trove git repo and add the extra elements as a environment variable.
git clone https://github.com/openstack/trove.git
# Guest Image to be used
export DISTRO=fedora
export DISTRO_VERSION=fedora-minimal
# Guest database to be provisioned
export SERVICE_TYPE=mariadb
export HOST_USERNAME=root
export HOST_SCP_USERNAME=root
export GUEST_USERNAME=trove
export CONTROLLER_IP=controller
export TROVESTACK_SCRIPTS="/root/trove/integration/scripts"
export PATH_TROVE="/opt/trove"
export ESCAPED_PATH_TROVE=$(echo $PATH_TROVE | sed 's/\//\\\//g')
export GUEST_LOGDIR="/var/log/trove"
export ESCAPED_GUEST_LOGDIR=$(echo $GUEST_LOGDIR | sed 's/\//\\\//g')
#path to the ssh keys you want installed on the guest.
export SSH_DIR=~/trove-image/sshkeys/
export DIB_CLOUD_INIT_DATASOURCES="ConfigDrive"
# DATASTORE_PKG_LOCATION defines the location from where the datastore packages can be accessed by the DIB elements. This is applicable only for datastores that do not have a public repository from where their packages can be accessed. This can either be a url to a private repository or a location on the local filesystem that contains the datastore packages.
export DATASTORE_PKG_LOCATION=~/trove-image
export ELEMENTS_PATH=$TROVESTACK_SCRIPTS/files/elements
export DIB_APT_CONF_DIR=/etc/apt/apt.conf.d
export DIB_CLOUD_INIT_ETC_HOSTS=true
#WTF Is this?
#local QEMU_IMG_OPTIONS="--qemu-img-options compat=1.1"
#build the disk image in our home dir.
disk-image-create -a amd64 -o ~/trove-${DISTRO_VERSION}-${SERIVCE_TYPE}.qcow2 -x ${DISTRO_VERSION} ${DISTRO}-guest vm cloud-init-datasources ${DISTRO}-${SERVICE_TYPE}