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kubernetes/hack/grab-profiles.sh
Jin Hase e992ec0d59 Add comments in several hack/*.sh
2020-01-28 09:27:40 +09:00

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#!/usr/bin/env bash
# Copyright 2015 The Kubernetes Authors.
#
# 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.
# This script grabs profiles from running components.
# Usage: `hack/grab-profiles.sh`.
set -o errexit
set -o nounset
set -o pipefail
function grab_profiles_from_component {
local requested_profiles=$1
local mem_pprof_flags=$2
local binary=$3
local tunnel_port=$4
local path=$5
local output_prefix=$6
local timestamp=$7
echo "binary: $binary"
for profile in ${requested_profiles}; do
case ${profile} in
cpu)
go tool pprof "-pdf" "${binary}" "http://localhost:${tunnel_port}${path}/debug/pprof/profile" > "${output_prefix}-${profile}-profile-${timestamp}.pdf"
;;
mem)
# There are different kinds of memory profiles that are available that
# had to be grabbed separately: --inuse-space, --inuse-objects,
# --alloc-space, --alloc-objects. We need to iterate over all requested
# kinds.
for flag in ${mem_pprof_flags}; do
go tool pprof "-${flag}" "-pdf" "${binary}" "http://localhost:${tunnel_port}${path}/debug/pprof/heap" > "${output_prefix}-${profile}-${flag}-profile-${timestamp}.pdf"
done
;;
esac
done
}
KUBE_ROOT=$(dirname "${BASH_SOURCE[0]}")/..
source "${KUBE_ROOT}/hack/lib/init.sh"
server_addr=""
kubelet_addresses=""
kubelet_binary=""
master_binary=""
scheduler_binary=""
scheduler_port="10251"
controller_manager_port="10252"
controller_manager_binary=""
requested_profiles=""
mem_pprof_flags=""
profile_components=""
output_dir="."
tunnel_port="${tunnel_port:-1234}"
args=$(getopt -o s:mho:k:c -l server:,master,heapster,output:,kubelet:,scheduler,controller-manager,help,inuse-space,inuse-objects,alloc-space,alloc-objects,cpu,kubelet-binary:,master-binary:,scheduler-binary:,controller-manager-binary:,scheduler-port:,controller-manager-port: -- "$@")
if [[ $? ]]; then
>&2 echo "Error in getopt"
exit 1
fi
HEAPSTER_VERSION="v0.18.2"
MASTER_PPROF_PATH=""
HEAPSTER_PPROF_PATH="/api/v1/namespaces/kube-system/services/monitoring-heapster/proxy"
KUBELET_PPROF_PATH_PREFIX="/api/v1/proxy/nodes"
SCHEDULER_PPROF_PATH_PREFIX="/api/v1/namespaces/kube-system/pods/kube-scheduler/proxy"
CONTROLLER_MANAGER_PPROF_PATH_PREFIX="/api/v1/namespaces/kube-system/pods/kube-controller-manager/proxy"
eval set -- "${args}"
while true; do
case $1 in
-s|--server)
shift
if [ -z "$1" ]; then
>&2 echo "empty argument to --server flag"
exit 1
fi
server_addr=$1
shift
;;
-m|--master)
shift
profile_components="master ${profile_components}"
;;
--master-binary)
shift
if [ -z "$1" ]; then
>&2 echo "empty argument to --master-binary flag"
exit 1
fi
master_binary=$1
shift
;;
-h|--heapster)
shift
profile_components="heapster ${profile_components}"
;;
-k|--kubelet)
shift
profile_components="kubelet ${profile_components}"
if [ -z "$1" ]; then
>&2 echo "empty argument to --kubelet flag"
exit 1
fi
kubelet_addresses="$1 $kubelet_addresses"
shift
;;
--kubelet-binary)
shift
if [ -z "$1" ]; then
>&2 echo "empty argument to --kubelet-binary flag"
exit 1
fi
kubelet_binary=$1
shift
;;
--scheduler)
shift
profile_components="scheduler ${profile_components}"
;;
--scheduler-binary)
shift
if [ -z "$1" ]; then
>&2 echo "empty argument to --scheduler-binary flag"
exit 1
fi
scheduler_binary=$1
shift
;;
--scheduler-port)
shift
if [ -z "$1" ]; then
>&2 echo "empty argument to --scheduler-port flag"
exit 1
fi
scheduler_port=$1
shift
;;
-c|--controller-manager)
shift
profile_components="controller-manager ${profile_components}"
;;
--controller-manager-binary)
shift
if [ -z "$1" ]; then
>&2 echo "empty argument to --controller-manager-binary flag"
exit 1
fi
controller_manager_binary=$1
shift
;;
--controller-manager-port)
shift
if [ -z "$1" ]; then
>&2 echo "empty argument to --controller-manager-port flag"
exit 1
fi
controller_manager_port=$1
shift
;;
-o|--output)
shift
if [ -z "$1" ]; then
>&2 echo "empty argument to --output flag"
exit 1
fi
output_dir=$1
shift
;;
--inuse-space)
shift
requested_profiles="mem ${requested_profiles}"
mem_pprof_flags="inuse_space ${mem_pprof_flags}"
;;
--inuse-objects)
shift
requested_profiles="mem ${requested_profiles}"
mem_pprof_flags="inuse_objects ${mem_pprof_flags}"
;;
--alloc-space)
shift
requested_profiles="mem ${requested_profiles}"
mem_pprof_flags="alloc_space ${mem_pprof_flags}"
;;
--alloc-objects)
shift
requested_profiles="mem ${requested_profiles}"
mem_pprof_flags="alloc_objects ${mem_pprof_flags}"
;;
--cpu)
shift
requested_profiles="cpu ${requested_profiles}"
;;
--help)
shift
echo "Recognized options:
-o/--output,
-s/--server,
-m/--master,
-h/--heapster,
--inuse-space,
--inuse-objects,
--alloc-space,
--alloc-objects,
--cpu,
--help"
exit 0
;;
--)
shift
break;
;;
esac
done
if [[ -z "${server_addr}" ]]; then
>&2 echo "Server flag is required"
exit 1
fi
if [[ -z "${profile_components}" ]]; then
>&2 echo "Choose at least one component to profile"
exit 1
fi
if [[ -z "${requested_profiles}" ]]; then
>&2 echo "Choose at least one profiling option"
exit 1
fi
gcloud compute ssh "${server_addr}" --ssh-flag=-nN --ssh-flag=-L"${tunnel_port}":localhost:8080 &
echo "Waiting for tunnel to be created..."
kube::util::wait_for_url http://localhost:"${tunnel_port}"/healthz
SSH_PID=$(pgrep -f "/usr/bin/ssh.*${tunnel_port}:localhost:8080")
kube::util::trap_add "kill $SSH_PID" EXIT
kube::util::trap_add "kill $SSH_PID" SIGTERM
requested_profiles=$(echo "${requested_profiles}" | xargs -n1 | LC_ALL=C sort -u | xargs)
profile_components=$(echo "${profile_components}" | xargs -n1 | LC_ALL=C sort -u | xargs)
kubelet_addresses=$(echo "${kubelet_addresses}" | xargs -n1 | LC_ALL=C sort -u | xargs)
echo "requested profiles: ${requested_profiles}"
echo "flags for heap profile: ${mem_pprof_flags}"
timestamp=$(date +%Y%m%d%H%M%S)
binary=""
for component in ${profile_components}; do
case ${component} in
master)
path=${MASTER_PPROF_PATH}
binary=${master_binary}
;;
controller-manager)
path="${CONTROLLER_MANAGER_PPROF_PATH_PREFIX}-${server_addr}:${controller_manager_port}"
binary=${controller_manager_binary}
;;
scheduler)
path="${SCHEDULER_PPROF_PATH_PREFIX}-${server_addr}:${scheduler_port}"
binary=${scheduler_binary}
;;
heapster)
rm heapster
wget https://github.com/kubernetes/heapster/releases/download/${HEAPSTER_VERSION}/heapster
kube::util::trap_add 'rm -f heapster' EXIT
kube::util::trap_add 'rm -f heapster' SIGTERM
binary=heapster
path=${HEAPSTER_PPROF_PATH}
;;
kubelet)
path="${KUBELET_PPROF_PATH_PREFIX}"
if [[ -z "${kubelet_binary}" ]]; then
binary="${KUBE_ROOT}/_output/local/bin/linux/amd64/kubelet"
else
binary=${kubelet_binary}
fi
;;
esac
if [[ "${component}" == "kubelet" ]]; then
for node in ${kubelet_addresses//[,;]/' '}; do
grab_profiles_from_component "${requested_profiles}" "${mem_pprof_flags}" "${binary}" "${tunnel_port}" "${path}/${node}/proxy" "${output_dir}/${component}" "${timestamp}"
done
else
grab_profiles_from_component "${requested_profiles}" "${mem_pprof_flags}" "${binary}" "${tunnel_port}" "${path}" "${output_dir}/${component}" "${timestamp}"
fi
done
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