Skip to content

Latest commit

 

History

History
113 lines (79 loc) · 3 KB

install_configure_validate.md

File metadata and controls

113 lines (79 loc) · 3 KB
Raw

Installation, Configuration & Validation (12%)

kubernetes.io > Documentation > Reference > kubectl CLI > kubectl Cheat Sheet

kubernetes.io > Documentation > Tasks > Monitoring, Logging, and Debugging > Get a Shell to a Running Container

kubernetes.io > Documentation > Tasks > Access Applications in a Cluster > Configure Access to Multiple Clusters

kubernetes.io > Documentation > Tasks > Access Applications in a Cluster > Accessing Clusters using API

kubernetes.io > Documentation > Tasks > Access Applications in a Cluster > Use Port Forwarding to Access Applications in a Cluster

List all namespaces in your cluster

show 

kubectl get ns

List all pod in all namespaces

show 

kubectl get po --all-namespaces

Create a new namespace named web

show 

kubectl create ns web

Look up the value for the key cluster.name in the etcd cluster and backup etcd

show 

ETCDCTL_API=3 etcdctl get cluster.name \
--endpoints=https://10.0.1.101:2379 \
--cacert=/home/cloud_user/etcd-certs/etcd-ca.pem \
--cert=/home/cloud_user/etcd-certs/etcd-server.crt \
--key=/home/cloud_user/etcd-certs/etcd-server.key

ETCDCTL_API=3 etcdctl snapshot save /home/cloud_user/etcd_backup.db \
--endpoints=https://10.0.1.101:2379 \
--cacert=/home/cloud_user/etcd-certs/etcd-ca.pem \
--cert=/home/cloud_user/etcd-certs/etcd-server.crt \
--key=/home/cloud_user/etcd-certs/etcd-server.key

Reset etcd and remove all data from the etcd

show 

sudo systemctl stop etcd

sudo rm -rf /var/lib/etcd

Restore an etcd store from backup.

show 

# spin up a temporary etcd cluster and save the data from the backup file to a new directory (/var/lib/etcd)
sudo ETCDCTL_API=3 etcdctl snapshot restore /home/cloud_user/etcd_backup.db \
--initial-cluster etcd-restore=https://10.0.1.101:2380 \
--initial-advertise-peer-urls https://10.0.1.101:2380 \
--name etcd-restore \
--data-dir /var/lib/etcd

# set ownership of the new data directory
sudo chown -R etcd:etcd /var/lib/etcd

# start etcd
sudo systemctl start etcd

# Verify the data was restored
ETCDCTL_API=3 etcdctl get cluster.name \
--endpoints=https://10.0.1.101:2379 \
--cacert=/home/cloud_user/etcd-certs/etcd-ca.pem \
--cert=/home/cloud_user/etcd-certs/etcd-server.crt \
--key=/home/cloud_user/etcd-certs/etcd-server.key