#!/bin/bash # AUTHOR: Abhishek Tamrakar # EMAIL: abhishek.tamrakar08@gmail.com # LICENSE: Copyright (C) 2018 Abhishek Tamrakar # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. ## #define the variables KUBE_LOC=~/.kube/config #define variables KUBECTL=$(which kubectl) GET=$(which egrep) AWK=$(which awk) red=$(tput setaf 1) normal=$(tput sgr0) # define functions
# wrapper for printing info messages info() { printf '\n\e[34m%s\e[m: %s\n' "INFO" "$@" }
# cleanup when all done cleanup() { rm -f results.csv }
# just check if the command we are about to call is available checkcmd() { #check if command exists local cmd=$1 if [ -z "${!cmd}" ] then printf '\n\e[31m%s\e[m: %s\n' "ERROR" "check if $1 is installed !!!" exit 1 fi }
get_namespaces() { #get namespaces namespaces=( \ $($KUBECTL get namespaces --ignore-not-found=true | \ $AWK '/Active/ {print $1}' \ ORS=" ") \ ) #exit if namespaces are not found if [ ${#namespaces[@]} -eq 0 ] then printf '\n\e[31m%s\e[m: %s\n' "ERROR" "No namespaces found!!" exit 1 fi }
#get events for pods in errored state get_pod_events() { printf '\n' if [ ${#ERRORED[@]} -ne 0 ] then info "${#ERRORED[@]} errored pods found." for CULPRIT in ${ERRORED[@]} do info "POD: $CULPRIT" info $KUBECTL get events \ --field-selector=involvedObject.name=$CULPRIT \ -ocustom-columns=LASTSEEN:.lastTimestamp,REASON:.reason,MESSAGE:.message \ --all-namespaces \ --ignore-not-found=true done else info "0 pods with errored events found." fi }
#define the logic get_pod_errors() { printf "%s %s %s\n" "NAMESPACE,POD_NAME,CONTAINER_NAME,ERRORS" > results.csv printf "%s %s %s\n" "---------,--------,--------------,------" >> results.csv for NAMESPACE in ${namespaces[@]} do while IFS=' ' read -r POD CONTAINERS do for CONTAINER in ${CONTAINERS//,/ } do COUNT=$($KUBECTL logs --since=1h --tail=20 $POD -c $CONTAINER -n $NAMESPACE 2>/dev/null| \ $GET -c '^error|Error|ERROR|Warn|WARN') if [ $COUNT -gt 0 ] then STATE=("${STATE[@]}" "$NAMESPACE,$POD,$CONTAINER,$COUNT") else #catch pods in errored state ERRORED=($($KUBECTL get pods -n $NAMESPACE --no-headers=true | \ awk '!/Running/ {print $1}' ORS=" ") \ ) fi done done< <($KUBECTL get pods -n $NAMESPACE --ignore-not-found=true -o=custom-columns=NAME:.metadata.name,CONTAINERS:.spec.containers[*].name --no-headers=true) done printf "%s\n" ${STATE[@]:-None} >> results.csv STATE=() } #define usage for seprate run usage() { cat << EOF
This program is a free software under the terms of Apache 2.0 License. COPYRIGHT (C) 2018 Abhishek Tamrakar
EOF exit 0 }
#check if basic commands are found trap cleanup EXIT checkcmd KUBECTL # #set the ground if [ $# -lt 1 ]; then if [ ! -e ${KUBE_LOC} -a ! -s ${KUBE_LOC} ] then info "A readable kube config location is required!!" usage fi elif [ $# -eq 1 ] then export KUBECONFIG=$1 elif [ $# -gt 1 ] then usage fi #play get_namespaces get_pod_errors
printf '\n%40s\n' 'KRAWL' printf '%s\n' '---------------------------------------------------------------------------------' printf '%s\n' ' Krawl is a command line utility to scan pods and prints name of errored pods ' printf '%s\n\n' ' +and containers within. To use it as kubernetes plugin, please check their page ' printf '%s\n' '================================================================================='
cat results.csv | sed 's/,/,|/g'| column -s ',' -t get_pod_events
