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#!/usr/bin/env bash
###################################################################
#Script Name : k8s_app_info.sh
#Description : get app info.
#Create Date : 2020-11-19
#Author : lework
#Email : lework@yeah.net
###################################################################
[[ -n $DEBUG ]] && set -x || true
set -o errtrace # Make sure any error trap is inherited
set -o nounset # Disallow expansion of unset variables
set -o pipefail # Use last non-zero exit code in a pipeline
######################################################################################################
# environment configuration
######################################################################################################
NAMESPACE="${NAMESPACE:-default}"
APPNAME="${APPNAME:-}"
SELECTOR="${SELECTOR:-}"
INFO_FILE="k8s-app-info_$(date +%s).md"
######################################################################################################
# function
######################################################################################################
function log::echo {
local code=$1
local space=$2
local text=$3
[[ "$code" == "0" ]] && code=32 || { code=31; text="ERROR"; }
echo -e "\033[0;${code}m $(head -c $((12-${space})) /dev/zero |tr '\0' '.')........................ ${text}\033[0m"
}
function file::write {
printf "%s\n" "$*" >> $INFO_FILE
}
function exec::kubectl {
local result
local code
result="$(kubectl -n $NAMESPACE $* 2>/dev/null)"
code="$?"
if [[ "$code" == "0" ]]; then
file::write "
\`\`\`bash
# kubectl -n $NAMESPACE $*
${result}
\`\`\`"
fi
return "$code"
}
function get::selector {
echo -ne "Get Selector"
if [[ "${SELECTOR}" == "" ]]; then
selflink=$(kubectl -n $NAMESPACE get deployment $APPNAME -o yaml --ignore-not-found 2>/dev/null | awk '/selfLink:/ {print $2}')
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SELECTOR=$(kubectl get --raw "${selflink}/scale" 2>/dev/null | sed 's/.*[S|s]elector":"\(.*\)".*/\1/g')
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fi
if [[ "${SELECTOR}" == "" ]]; then
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resource="service job cronjob replicaset daemonset statefulset"
for r in $resource
do
SELECTOR=$(kubectl -n kube-system get ${r} ${APPNAME} --ignore-not-found --show-labels --no-headers 2>/dev/null | awk '{print $NF}' | grep -v '<none>' |head -1)
if [[ "${SELECTOR}" != "" ]]; then break;fi
done
fi
if [[ "${SELECTOR}" == "" ]]; then
echo -e "\n\033[0;31m[Error] not found $APPNAME selector.\033[0m"
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exit 1
fi
file::write "
# [INFO]
namespace: \`${NAMESPACE}\`$(if [[ "$APPNAME" != "" ]];then echo -e "\nname: \`${APPNAME}\`";fi)
selector: \`${SELECTOR}\`
"
log::echo "0" "8" "OK"
}
function get::describe {
control=$1
echo -ne "Get ${control^}"
file::write "# [${control^}]"
names=$(kubectl -n $NAMESPACE get $control -l "$SELECTOR" --no-headers --ignore-not-found 2>/dev/null | awk '{print $1}')
[[ "$names" == "" && "$APPNAME" != "" ]] && names=$(kubectl -n $NAMESPACE get $control $APPNAME --no-headers --ignore-not-found 2>/dev/null | awk '{print $1}')
for i in $names; do
file::write "## $i"
exec::kubectl describe $control $i
exec::kubectl get $control $i -o yaml
done
log::echo "$?" "${#control}" "$(echo $names | wc -w)"
}
function get::pods_log {
echo -ne "Get Pod log"
file::write "# [Pod Log]"
names=$(kubectl -n $NAMESPACE get pods -l "$SELECTOR" --no-headers --ignore-not-found 2>/dev/null | awk '{print $1}' 2>/dev/null)
log::echo "$?" "7" "$(echo $names | wc -w)"
for i in $names; do
echo "Get Pod: $i"
file::write "## $i"
exec::kubectl logs --tail 200 $i --all-containers
done
}
function get::k8s_event {
echo -ne "Get k8s Event"
file::write "# [Event]"
exec::kubectl get event
log::echo "$?" "9" "OK"
}
function get::cluster {
echo -ne "Get Cluster"
file::write "# [Cluster]"
exec::kubectl top node
log::echo "$?" "7" "OK"
}
function get::info {
get::selector
get::describe ingress
get::describe service
get::describe endpoints
get::describe deployment
get::describe replicaset
get::describe daemonset
get::describe cronjob
get::describe job
get::describe pod
get::describe configmaps
get::describe secrets
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get::describe pvc
get::describe pv
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get::pods_log
get::k8s_event
get::cluster
}
function help::usage {
# 使用帮助
cat << EOF
Get k8s app info.
Usage:
$(basename $0) [flag]
Flag:
-ns,--namespace namespace
-n,--name name
-l,--selector selector
EOF
exit 1
}
######################################################################################################
# main
######################################################################################################
[ "$#" == "0" ] && help::usage || true
while [ "${1:-}" != "" ]; do
case $1 in
-ns | --namespace ) shift
NAMESPACE=${1:-$NAMESPACE}
;;
-n | --name ) shift
APPNAME=${1:-$APPNAME}
;;
-l | --selector ) shift
SELECTOR=${1:-$SELECTOR}
;;
* ) help::usage
esac
shift
done
[[ "${APPNAME}" == "" && "${SELECTOR}" == "" ]] && help::usage
[ -f "${INFO_FILE}" ] && rm -f "${INFO_FILE}"
get::info
echo -e "\nFile: ${INFO_FILE}"