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https://rafaelszp.github.io/A technical blog featuring tutorials and guides on OpenSSL certificate generation, Docker and BuildKit, Kubernetes (kubectl), Java 8 design patterns, Arch Linux configuration, and various command-line utilities for SSH, LDAP, and Maven.
userinfo endpoint. You must include the user's access token in the Authorization header as a Bearer token.GET http://{SERVER_URL}/auth/realms/{realm}/protocol/openid-connect/userinfo
Authorization: Bearer {token}about:config editor. After applying these settings, it is recommended to clear all browsing data to remove cached redirects.network.stricttransportsecurity.preloadlist = false
browser.fixup.fallback-to-https = false
dom.security.https_first = false
dom.security.https_first_pbm = falsekubectl api-resources command to list all available API resources in the cluster. Adding --sort-by name organizes the list alphabetically, and -o wide provides additional details about the resources.kubectl api-resources --sort-by name -o widessh-keygen command specifying the RSA type and the desired file path for the key.ssh-keygen -t rsa -f [KEY_PATH]/id_rsa# 1. Backup ETCD
ETCDCTL_API=3 etcdctl --endpoints=https://[127.0.0.1]:2379 --cacert=/etc/kubernetes/pki/etcd/ca.crt \
--cert=/etc/kubernetes/pki/etcd/server.crt --key=/etc/kubernetes/pki/etcd/server.key \
snapshot save /tmp/snapshot-pre-boot.db
# 2. Drain the node
kubectl drain <master01>
# [Perform System update | patches and reboot]
# 3. Uncordon the node
kubectl uncordon <master01>settings.xml to handle authentication using an environment variable for the auth token, and then use the mvn deploy:deploy-file command to upload the artifact.# 1. Configure settings.xml
# Add this to your ~/.m2/settings.xml
<settings>
<servers>
<server>
<id>codeartifact</id>
<username>aws</username>
<password>${env.CODEARTIFACT_AUTH_TOKEN}</password>
</server>
</servers>
</settings>
# 2. Execute the deploy command
mvn deploy:deploy-file \
-DgroupId=commons-cli \
-DartifactId=commons-cli \
-Dversion=1.4 \
-Dfile=./commons-cli-1.4.jar \
-Dpackaging=jar \
-DrepositoryId=codeartifact \
-Durl=https://my_domain-111122223333.d.codeartifact.region.amazonaws.com/maven/repo-name/yum install postfix mailx cyrus-sasl-plain# Reset the worker node
yes | kubeadm reset
# Set the new IP and update kubelet configuration
export K8S_NODE_IP=<NEW_IP>
echo "KUBELET_EXTRA_ARGS="--node-ip=$K8S_NODE_IP"" > /etc/sysconfig/kubelet
# On the Control Plane, generate a new join command
kubeadm token create --print-join-commandSIGUSR1 to stop notifications and scheduling a SIGUSR2 signal via the at command to re-enable them after a set duration. This requires the at package, the atd daemon running, and dunst as the active notification daemon.#!/bin/sh
SIGNAL=$1
if [ -z $SIGNAL ]; then
echo "Signal must be provided: on|off"
exit -127
fi
if [ $SIGNAL == "on" ]; then
# Remove any existing scheduled focus-mode tasks
atrm $(atq -qf | cut -f1) 2> /dev/null || echo $status
notify-send --urgency=low --expire-time=1000 --category=FOCUS "Focus mode on" "Focus mode Started"
sleep 1
# Disable Dunst notifications
killall -SIGUSR1 dunst
# Schedule Dunst to be re-enabled in 50 minutes
echo "killall -SIGUSR2 dunst" | at -q f now +50 minutes
else
# Manually re-enable Dunst notifications
killall -SIGUSR2 dunst
atrm $(atq -qf | cut -f1) 2>/dev/null || echo $status
notify-send --urgency=low --expire-time=3000 --category=FOCUS "Focus mode off" "Focus mode ended"
fi
atqnetsh command and disable IPv6 components via the Windows Registry.# Disable ISATAP
netsh int ipv6 isatap set state disabled
# Disable Teredo
netsh int teredo set state disabled
# Disable 6to4
netsh interface ipv6 6to4 set state state=disabled undoonstop=disabled
# Disable IPv6 components via Registry
reg add "HKLM\System\CurrentControlSet\Services\Tcpip6\Parameters" /v "DisabledComponents" /t REG_DWORD /d "255" /fThere are two primary ways to trigger tasks outside of a continuous service: