# Check logs for a given pod
kubectl logs "$(kubectl get pods -o jsonpath='{.items[0].metadata.name}')"
# Run commands within a given pod
kubectl exec -it "$(kubectl get pods -o jsonpath='{.items[0].metadata.name}')" -- nginx -v
#
#!/bin/bash
# Get the Docker gpg key:
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
# Add the Docker repository:
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
$(lsb_release -cs) \
stable"
# Get the Kubernetes gpg key:
curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
# Add the Kubernetes repository:
cat << EOF | sudo tee /etc/apt/sources.list.d/kubernetes.list
deb https://apt.kubernetes.io/ kubernetes-xenial main
EOF
# Update packages and install Docker, kubelet, kubeadm, and kubectl:
sudo apt-get update && sudo apt-get install -y docker-ce kubelet kubeadm kubectl && sudo apt-get dist-upgrade -y
# Add the iptables rule to sysctl.conf:
echo "net.bridge.bridge-nf-call-iptables=1" | sudo tee -a /etc/sysctl.conf
# Enable iptables immediately:
sudo sysctl -p
# Initialize the cluster:
sudo kubeadm init --pod-network-cidr=10.244.0.0/16
# Set up local kubeconfig:
mkdir -p /home/cka-admin/.kube
sudo -i -u cka-admin cp -i /etc/kubernetes/admin.conf /home/cka-admin/.kube/config
sudo -i -u cka-admin chown $(id -u):$(id -g) /home/cka-admin/.kube/config
# Apply Flannel CNI network overlay:
kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
#!/bin/bash
# Get the Docker gpg key:
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
# Add the Docker repository:
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
$(lsb_release -cs) \
stable"
# Get the Kubernetes gpg key:
curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
# Add the Kubernetes repository:
cat << EOF | sudo tee /etc/apt/sources.list.d/kubernetes.list
deb https://apt.kubernetes.io/ kubernetes-xenial main
EOF
# Update packages and install Docker, kubelet, kubeadm, and kubectl:
sudo apt-get update && sudo apt-get install -y docker-ce kubelet kubeadm kubectl && sudo apt-get dist-upgrade -y
# Add the iptables rule to sysctl.conf:
echo "net.bridge.bridge-nf-call-iptables=1" | sudo tee -a /etc/sysctl.conf
# Enable iptables immediately:
sudo sysctl -p
# Apply Flannel CNI network overlay:
kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
