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| 1 | +#!/bin/bash |
| 2 | + |
| 3 | +# Function to display usage instructions |
| 4 | +usage() { |
| 5 | + echo "Usage: $0 [-n NAMESPACE] [-p POD_NAME] [-c CONTAINER_NAME] [-f FOLLOW] [-o OUTPUT_FILE]" |
| 6 | + echo " -n NAMESPACE : The namespace of the pod (default: default)" |
| 7 | + echo " -p POD_NAME : The name of the pod" |
| 8 | + echo " -c CONTAINER_NAME : The name of the container (optional)" |
| 9 | + echo " -f FOLLOW : Follow the log output (optional, default: false)" |
| 10 | + echo " -o OUTPUT_FILE : The file to write the logs to (optional)" |
| 11 | + exit 1 |
| 12 | +} |
| 13 | + |
| 14 | +# Default values |
| 15 | +NAMESPACE="default" |
| 16 | +FOLLOW=false |
| 17 | +OUTPUT_FILE="" |
| 18 | + |
| 19 | +# Parse command line arguments |
| 20 | +while getopts ":n:p:c:fo:" opt; do |
| 21 | + case ${opt} in |
| 22 | + n ) |
| 23 | + NAMESPACE=$OPTARG |
| 24 | + ;; |
| 25 | + p ) |
| 26 | + POD_NAME=$OPTARG |
| 27 | + ;; |
| 28 | + c ) |
| 29 | + CONTAINER_NAME=$OPTARG |
| 30 | + ;; |
| 31 | + f ) |
| 32 | + FOLLOW=true |
| 33 | + ;; |
| 34 | + o ) |
| 35 | + OUTPUT_FILE=$OPTARG |
| 36 | + ;; |
| 37 | + \? ) |
| 38 | + usage |
| 39 | + ;; |
| 40 | + : ) |
| 41 | + echo "Invalid option: $OPTARG requires an argument" 1>&2 |
| 42 | + usage |
| 43 | + ;; |
| 44 | + esac |
| 45 | +done |
| 46 | + |
| 47 | +# Validate required arguments |
| 48 | +if [ -z "${POD_NAME}" ]; then |
| 49 | + echo "Error: Pod name is required" |
| 50 | + usage |
| 51 | +fi |
| 52 | + |
| 53 | +# Construct the kubectl command |
| 54 | +KUBECTL_CMD="kubectl logs -n ${NAMESPACE} ${POD_NAME}" |
| 55 | + |
| 56 | +# Append container name if provided |
| 57 | +if [ ! -z "${CONTAINER_NAME}" ]; then |
| 58 | + KUBECTL_CMD="${KUBECTL_CMD} -c ${CONTAINER_NAME}" |
| 59 | +fi |
| 60 | + |
| 61 | +# Append follow flag if set |
| 62 | +if [ "${FOLLOW}" = true ]; then |
| 63 | + KUBECTL_CMD="${KUBECTL_CMD} -f" |
| 64 | +fi |
| 65 | + |
| 66 | +# Execute the command and handle output |
| 67 | +if [ ! -z "${OUTPUT_FILE}" ]; then |
| 68 | + echo "Fetching logs for pod '${POD_NAME}' in namespace '${NAMESPACE}' and writing to '${OUTPUT_FILE}'..." |
| 69 | + $KUBECTL_CMD > "${OUTPUT_FILE}" |
| 70 | +else |
| 71 | + echo "Fetching logs for pod '${POD_NAME}' in namespace '${NAMESPACE}'..." |
| 72 | + $KUBECTL_CMD |
| 73 | +fi |
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