81 lines
2.0 KiB
Bash
Executable File
81 lines
2.0 KiB
Bash
Executable File
#!/usr/bin/env bash
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source .utils
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NAMESPACE="$(kubectl config view --minify --output 'jsonpath={..namespace}' &>/dev/null)"
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set -e
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NAMESPACE=${NAMESPACE:-default}
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POD="kube-ssh"
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NODE=""
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IMAGE="alpine"
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print_usage() {
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blue "kube-ssh - gain access to a Kubernetes host node (ssh-like for when a host doesn't have ssh)"
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echo " "
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underline "Usage:"
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echo "kube-ssh [options]"
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echo " "
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underline "Options:"
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echo "-h, --help show this help text"
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echo "-n, --namespace the namespace to launch the pod in"
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echo "-N, --node the name of the node to access"
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echo "-i, --image the image to launch for debugging (default: alpine)"
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}
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while test $# -gt 0; do
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case "$1" in
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-n|--namespace)
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shift
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NAMESPACE=$1
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shift
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;;
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-N|--node)
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shift
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NODE=$1
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shift
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;;
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-i|--image)
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shift
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IMAGE=$1
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shift
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;;
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-h|--help)
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print_usage
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exit 0
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;;
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*)
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break
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;;
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esac
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done
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if [[ "$NODE" == "" ]]; then
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if [ -z "$(which fzf)" ]; then
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NODES=$(kubectl get nodes --no-headers -o custom-columns=name:.metadata.name)
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i=0
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while read -r node; do
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echo "[$i] - $node"
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i=$((i+1))
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done <<< "$NODES"
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read -p "Which node would you like to connect to? " -r
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echo ""
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IFS=$'\n' NODES=($NODES)
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NODE=${NODES[$REPLY]}
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else
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NODES=$(kubectl get nodes)
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NODE=$(echo "$NODES" | _fzf | awk '{print $1}')
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fi
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fi
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SERVER_VERSION=$(kubectl version --client=false -o json 2>/dev/null | jq -r '.serverVersion.minor')
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if [ ${SERVER_VERSION} -ge 22 ]; then
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kubectl debug node/${NODE} -it --image ${IMAGE}
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else
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NODE_NAME=$(kubectl get node $NODE -o template --template='{{index .metadata.labels "kubernetes.io/hostname"}}')
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NODE_SELECTOR='"nodeSelector": { "kubernetes.io/hostname": "'${NODE_NAME}'" },'
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kubectl run --namespace ${NAMESPACE} $POD --rm -it --image ${IMAGE} --privileged --overrides '{"spec":{'"${NODE_SELECTOR}"'"hostPID": true}}' --command nsenter -- --mount=/proc/1/ns/mnt -- /bin/bash
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fi
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