mirror of
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376 lines
15 KiB
Bash
Executable File
376 lines
15 KiB
Bash
Executable File
#!/bin/bash
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# Copyright 2017 The Kubernetes Authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# Call this to dump all master and node logs into the folder specified in $1
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# (defaults to _artifacts). Only works if the provider supports SSH.
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# TODO(shyamjvs): This script should be moved to test/e2e which is where it ideally belongs.
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set -o errexit
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set -o nounset
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set -o pipefail
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readonly report_dir="${1:-_artifacts}"
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readonly gcs_artifacts_dir="${2:-}"
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readonly logexporter_namespace="${3:-logexporter}"
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# In order to more trivially extend log-dump for custom deployments,
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# check for a function named log_dump_custom_get_instances. If it's
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# defined, we assume the function can me called with one argument, the
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# role, which is either "master" or "node".
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echo "Checking for custom logdump instances, if any"
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if [[ $(type -t log_dump_custom_get_instances) == "function" ]]; then
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readonly use_custom_instance_list=yes
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else
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readonly use_custom_instance_list=
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fi
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readonly master_ssh_supported_providers="gce aws kubernetes-anywhere"
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readonly node_ssh_supported_providers="gce gke aws kubernetes-anywhere"
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readonly gcloud_supported_providers="gce gke kubernetes-anywhere"
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readonly master_logfiles="kube-apiserver kube-apiserver-audit kube-scheduler rescheduler kube-controller-manager etcd etcd-events glbc cluster-autoscaler kube-addon-manager fluentd"
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readonly node_logfiles="kube-proxy fluentd node-problem-detector"
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readonly node_systemd_services="node-problem-detector"
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readonly hollow_node_logfiles="kubelet-hollow-node-* kubeproxy-hollow-node-* npd-hollow-node-*"
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readonly aws_logfiles="cloud-init-output"
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readonly gce_logfiles="startupscript"
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readonly kern_logfile="kern"
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readonly initd_logfiles="docker"
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readonly supervisord_logfiles="kubelet supervisor/supervisord supervisor/kubelet-stdout supervisor/kubelet-stderr supervisor/docker-stdout supervisor/docker-stderr"
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readonly systemd_services="kubelet ${LOG_DUMP_SYSTEMD_SERVICES:-docker}"
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# Limit the number of concurrent node connections so that we don't run out of
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# file descriptors for large clusters.
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readonly max_scp_processes=25
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# TODO: Get rid of all the sourcing of bash dependencies eventually.
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function setup() {
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KUBE_ROOT=$(dirname "${BASH_SOURCE}")/../..
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if [[ -z "${use_custom_instance_list}" ]]; then
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: ${KUBE_CONFIG_FILE:="config-test.sh"}
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echo "Sourcing kube-util.sh"
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source "${KUBE_ROOT}/cluster/kube-util.sh"
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echo "Detecting project"
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detect-project 2>&1
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elif [[ "${KUBERNETES_PROVIDER}" == "gke" ]]; then
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echo "Using 'use_custom_instance_list' with gke, skipping check for LOG_DUMP_SSH_KEY and LOG_DUMP_SSH_USER"
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# Source the below script for the ssh-to-node utility function.
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# Hack to save and restore the value of the ZONE env as the script overwrites it.
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local gke_zone="${ZONE:-}"
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source "${KUBE_ROOT}/cluster/gce/util.sh"
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ZONE="${gke_zone}"
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elif [[ -z "${LOG_DUMP_SSH_KEY:-}" ]]; then
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echo "LOG_DUMP_SSH_KEY not set, but required when using log_dump_custom_get_instances"
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exit 1
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elif [[ -z "${LOG_DUMP_SSH_USER:-}" ]]; then
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echo "LOG_DUMP_SSH_USER not set, but required when using log_dump_custom_get_instances"
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exit 1
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fi
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}
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function log-dump-ssh() {
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if [[ "${gcloud_supported_providers}" =~ "${KUBERNETES_PROVIDER}" ]]; then
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ssh-to-node "$@"
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return
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fi
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local host="$1"
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local cmd="$2"
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ssh -oLogLevel=quiet -oConnectTimeout=30 -oStrictHostKeyChecking=no -i "${LOG_DUMP_SSH_KEY}" "${LOG_DUMP_SSH_USER}@${host}" "${cmd}"
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}
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# Copy all files /var/log/{$3}.log on node $1 into local dir $2.
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# $3 should be a space-separated string of files.
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# This function shouldn't ever trigger errexit, but doesn't block stderr.
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function copy-logs-from-node() {
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local -r node="${1}"
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local -r dir="${2}"
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local files=( ${3} )
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# Append ".log*"
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# The * at the end is needed to also copy rotated logs (which happens
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# in large clusters and long runs).
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files=( "${files[@]/%/.log*}" )
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# Prepend "/var/log/"
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files=( "${files[@]/#/\/var\/log\/}" )
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# Comma delimit (even the singleton, or scp does the wrong thing), surround by braces.
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local -r scp_files="{$(printf "%s," "${files[@]}")}"
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if [[ "${gcloud_supported_providers}" =~ "${KUBERNETES_PROVIDER}" ]]; then
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# get-serial-port-output lets you ask for ports 1-4, but currently (11/21/2016) only port 1 contains useful information
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gcloud compute instances get-serial-port-output --project "${PROJECT}" --zone "${ZONE}" --port 1 "${node}" > "${dir}/serial-1.log" || true
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gcloud compute scp --recurse --project "${PROJECT}" --zone "${ZONE}" "${node}:${scp_files}" "${dir}" > /dev/null || true
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elif [[ "${KUBERNETES_PROVIDER}" == "aws" ]]; then
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local ip=$(get_ssh_hostname "${node}")
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scp -oLogLevel=quiet -oConnectTimeout=30 -oStrictHostKeyChecking=no -i "${AWS_SSH_KEY}" "${SSH_USER}@${ip}:${scp_files}" "${dir}" > /dev/null || true
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elif [[ -n "${use_custom_instance_list}" ]]; then
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scp -oLogLevel=quiet -oConnectTimeout=30 -oStrictHostKeyChecking=no -i "${LOG_DUMP_SSH_KEY}" "${LOG_DUMP_SSH_USER}@${node}:${scp_files}" "${dir}" > /dev/null || true
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else
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echo "Unknown cloud-provider '${KUBERNETES_PROVIDER}' and use_custom_instance_list is unset too - skipping logdump for '${node}'"
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fi
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}
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# Save logs for node $1 into directory $2. Pass in any non-common files in $3.
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# Pass in any non-common systemd services in $4.
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# $3 and $4 should be a space-separated list of files.
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# Set $5 to true to indicate it is on master. Default to false.
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# This function shouldn't ever trigger errexit
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function save-logs() {
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local -r node_name="${1}"
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local -r dir="${2}"
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local files="${3}"
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local opt_systemd_services="${4:-""}"
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local on_master="${5:-"false"}"
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if [[ -n "${use_custom_instance_list}" ]]; then
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if [[ -n "${LOG_DUMP_SAVE_LOGS:-}" ]]; then
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files="${files} ${LOG_DUMP_SAVE_LOGS:-}"
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fi
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else
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case "${KUBERNETES_PROVIDER}" in
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gce|gke|kubernetes-anywhere)
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files="${files} ${gce_logfiles}"
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;;
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aws)
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files="${files} ${aws_logfiles}"
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;;
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esac
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fi
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local -r services=( ${systemd_services} ${opt_systemd_services} ${LOG_DUMP_SAVE_SERVICES:-} )
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if log-dump-ssh "${node_name}" "command -v journalctl" &> /dev/null; then
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if [[ "${on_master}" == "true" ]]; then
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log-dump-ssh "${node_name}" "sudo journalctl --output=short-precise -u kube-master-installation.service" > "${dir}/kube-master-installation.log" || true
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log-dump-ssh "${node_name}" "sudo journalctl --output=short-precise -u kube-master-configuration.service" > "${dir}/kube-master-configuration.log" || true
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else
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log-dump-ssh "${node_name}" "sudo journalctl --output=short-precise -u kube-node-installation.service" > "${dir}/kube-node-installation.log" || true
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log-dump-ssh "${node_name}" "sudo journalctl --output=short-precise -u kube-node-configuration.service" > "${dir}/kube-node-configuration.log" || true
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fi
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log-dump-ssh "${node_name}" "sudo journalctl --output=short-precise -k" > "${dir}/kern.log" || true
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for svc in "${services[@]}"; do
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log-dump-ssh "${node_name}" "sudo journalctl --output=cat -u ${svc}.service" > "${dir}/${svc}.log" || true
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done
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else
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files="${kern_logfile} ${files} ${initd_logfiles} ${supervisord_logfiles}"
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fi
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echo "Changing logfiles to be world-readable for download"
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log-dump-ssh "${node_name}" "sudo chmod -R a+r /var/log" || true
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echo "Copying '${files}' from ${node_name}"
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copy-logs-from-node "${node_name}" "${dir}" "${files}"
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}
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function dump_masters() {
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local master_names
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if [[ -n "${use_custom_instance_list}" ]]; then
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master_names=( $(log_dump_custom_get_instances master) )
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elif [[ ! "${master_ssh_supported_providers}" =~ "${KUBERNETES_PROVIDER}" ]]; then
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echo "Master SSH not supported for ${KUBERNETES_PROVIDER}"
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return
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elif [[ -n "${KUBEMARK_MASTER_NAME:-}" ]]; then
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master_names=( "${KUBEMARK_MASTER_NAME}" )
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else
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if ! (detect-master); then
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echo "Master not detected. Is the cluster up?"
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return
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fi
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master_names=( "${MASTER_NAME}" )
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fi
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if [[ "${#master_names[@]}" == 0 ]]; then
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echo "No masters found?"
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return
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fi
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proc=${max_scp_processes}
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for master_name in "${master_names[@]}"; do
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master_dir="${report_dir}/${master_name}"
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mkdir -p "${master_dir}"
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save-logs "${master_name}" "${master_dir}" "${master_logfiles}" "" "true" &
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# We don't want to run more than ${max_scp_processes} at a time, so
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# wait once we hit that many nodes. This isn't ideal, since one might
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# take much longer than the others, but it should help.
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proc=$((proc - 1))
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if [[ proc -eq 0 ]]; then
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proc=${max_scp_processes}
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wait
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fi
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done
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# Wait for any remaining processes.
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if [[ proc -gt 0 && proc -lt ${max_scp_processes} ]]; then
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wait
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fi
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}
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function dump_nodes() {
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local node_names=()
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if [[ -n "${1:-}" ]]; then
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echo "Dumping logs for nodes provided as args to dump_nodes() function"
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node_names=( "$@" )
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elif [[ -n "${use_custom_instance_list}" ]]; then
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echo "Dumping logs for nodes provided by log_dump_custom_get_instances() function"
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node_names=( $(log_dump_custom_get_instances node) )
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elif [[ ! "${node_ssh_supported_providers}" =~ "${KUBERNETES_PROVIDER}" ]]; then
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echo "Node SSH not supported for ${KUBERNETES_PROVIDER}"
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return
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else
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echo "Detecting nodes in the cluster"
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detect-node-names &> /dev/null
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if [[ -n "${NODE_NAMES:-}" ]]; then
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node_names=( "${NODE_NAMES[@]}" )
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fi
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fi
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if [[ "${#node_names[@]}" == 0 ]]; then
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echo "No nodes found!"
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return
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fi
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node_logfiles_all="${node_logfiles}"
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if [[ "${ENABLE_HOLLOW_NODE_LOGS:-}" == "true" ]]; then
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node_logfiles_all="${node_logfiles_all} ${hollow_node_logfiles}"
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fi
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nodes_selected_for_logs=()
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if [[ -n "${LOGDUMP_ONLY_N_RANDOM_NODES:-}" ]]; then
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# We randomly choose 'LOGDUMP_ONLY_N_RANDOM_NODES' many nodes for fetching logs.
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for index in `shuf -i 0-$(( ${#node_names[*]} - 1 )) -n ${LOGDUMP_ONLY_N_RANDOM_NODES}`
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do
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nodes_selected_for_logs+=("${node_names[$index]}")
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done
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else
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nodes_selected_for_logs=( "${node_names[@]}" )
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fi
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proc=${max_scp_processes}
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for node_name in "${nodes_selected_for_logs[@]}"; do
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node_dir="${report_dir}/${node_name}"
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mkdir -p "${node_dir}"
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# Save logs in the background. This speeds up things when there are
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# many nodes.
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save-logs "${node_name}" "${node_dir}" "${node_logfiles_all}" "${node_systemd_services}" &
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# We don't want to run more than ${max_scp_processes} at a time, so
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# wait once we hit that many nodes. This isn't ideal, since one might
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# take much longer than the others, but it should help.
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proc=$((proc - 1))
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if [[ proc -eq 0 ]]; then
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proc=${max_scp_processes}
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wait
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fi
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done
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# Wait for any remaining processes.
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if [[ proc -gt 0 && proc -lt ${max_scp_processes} ]]; then
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wait
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fi
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}
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function dump_nodes_with_logexporter() {
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echo "Detecting nodes in the cluster"
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detect-node-names &> /dev/null
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if [[ -z "${NODE_NAMES:-}" ]]; then
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echo "No nodes found!"
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return
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fi
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# Obtain parameters required by logexporter.
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local -r service_account_credentials="$(cat ${GOOGLE_APPLICATION_CREDENTIALS} | base64 | tr -d '\n')"
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local -r cloud_provider="${KUBERNETES_PROVIDER}"
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local -r enable_hollow_node_logs="${ENABLE_HOLLOW_NODE_LOGS:-false}"
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local -r logexport_sleep_seconds="$(( 90 + NUM_NODES / 5 ))"
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# Fill in the parameters in the logexporter daemonset template.
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sed -i'' -e "s@{{.LogexporterNamespace}}@${logexporter_namespace}@g" "${KUBE_ROOT}/cluster/log-dump/logexporter-daemonset.yaml"
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sed -i'' -e "s@{{.ServiceAccountCredentials}}@${service_account_credentials}@g" "${KUBE_ROOT}/cluster/log-dump/logexporter-daemonset.yaml"
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sed -i'' -e "s@{{.CloudProvider}}@${cloud_provider}@g" "${KUBE_ROOT}/cluster/log-dump/logexporter-daemonset.yaml"
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sed -i'' -e "s@{{.GCSPath}}@${gcs_artifacts_dir}@g" "${KUBE_ROOT}/cluster/log-dump/logexporter-daemonset.yaml"
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sed -i'' -e "s@{{.EnableHollowNodeLogs}}@${enable_hollow_node_logs}@g" "${KUBE_ROOT}/cluster/log-dump/logexporter-daemonset.yaml"
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# Create the logexporter namespace, service-account secret and the logexporter daemonset within that namespace.
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KUBECTL="${KUBE_ROOT}/cluster/kubectl.sh"
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if ! "${KUBECTL}" create -f "${KUBE_ROOT}/cluster/log-dump/logexporter-daemonset.yaml"; then
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echo "Failed to create logexporter daemonset.. falling back to logdump through SSH"
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"${KUBECTL}" delete namespace "${logexporter_namespace}" || true
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dump_nodes "${NODE_NAMES[@]}"
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return
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fi
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# Give some time for the pods to finish uploading logs.
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sleep "${logexport_sleep_seconds}"
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# List registry of marker files (of nodes whose logexporter succeeded) from GCS.
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local nodes_succeeded
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for retry in {1..10}; do
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if nodes_succeeded=$(gsutil ls ${gcs_artifacts_dir}/logexported-nodes-registry); then
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echo "Successfully listed marker files for successful nodes"
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break
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else
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echo "Attempt ${retry} failed to list marker files for succeessful nodes"
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if [[ "${retry}" == 10 ]]; then
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echo "Final attempt to list marker files failed.. falling back to logdump through SSH"
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"${KUBECTL}" delete namespace "${logexporter_namespace}" || true
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dump_nodes "${NODE_NAMES[@]}"
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return
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fi
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sleep 2
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fi
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done
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# Collect names of nodes which didn't run logexporter successfully.
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# Note: This step is O(#nodes^2) as we check if each node is present in the list of succeeded nodes.
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# Making it linear would add code complexity without much benefit (as it just takes ~1s for 5k nodes).
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failed_nodes=()
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for node in "${NODE_NAMES[@]}"; do
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if [[ ! "${nodes_succeeded}" =~ "${node}" ]]; then
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echo "Logexporter didn't succeed on node ${node}. Queuing it for logdump through SSH."
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failed_nodes+=("${node}")
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fi
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done
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# Delete the logexporter resources and dump logs for the failed nodes (if any) through SSH.
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"${KUBECTL}" delete namespace "${logexporter_namespace}" || true
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if [[ "${#failed_nodes[@]}" != 0 ]]; then
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echo -e "Dumping logs through SSH for the following nodes:\n${failed_nodes[@]}"
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dump_nodes "${failed_nodes[@]}"
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fi
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}
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function main() {
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setup
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# Copy master logs to artifacts dir locally (through SSH).
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echo "Dumping logs from master locally to '${report_dir}'"
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dump_masters
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if [[ "${DUMP_ONLY_MASTER_LOGS:-}" == "true" ]]; then
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echo "Skipping dumping of node logs"
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return
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fi
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# Copy logs from nodes to GCS directly or to artifacts dir locally (through SSH).
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if [[ -n "${gcs_artifacts_dir}" ]]; then
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echo "Dumping logs from nodes to GCS directly at '${gcs_artifacts_dir}' using logexporter"
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dump_nodes_with_logexporter
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else
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echo "Dumping logs from nodes locally to '${report_dir}'"
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dump_nodes
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fi
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}
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main
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