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5e6171790b
Log exporter changes have been made in https://github.com/kubernetes/test-infra/pull/11121 and new version has been pushed in https://github.com/kubernetes/test-infra/pull/11149
488 lines
20 KiB
Bash
Executable File
488 lines
20 KiB
Bash
Executable File
#!/usr/bin/env 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.log kube-apiserver-audit.log kube-scheduler.log kube-controller-manager.log etcd.log etcd-events.log glbc.log cluster-autoscaler.log kube-addon-manager.log fluentd.log kubelet.cov"
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readonly node_logfiles="kube-proxy.log fluentd.log node-problem-detector.log kubelet.cov"
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readonly node_systemd_services="node-problem-detector"
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readonly hollow_node_logfiles="kubelet-hollow-node-*.log kubeproxy-hollow-node-*.log npd-hollow-node-*.log"
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readonly aws_logfiles="cloud-init-output.log"
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readonly gce_logfiles="startupscript.log"
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readonly kern_logfile="kern.log"
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readonly initd_logfiles="docker/log"
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readonly supervisord_logfiles="kubelet.log supervisor/supervisord.log supervisor/kubelet-stdout.log supervisor/kubelet-stderr.log supervisor/docker-stdout.log supervisor/docker-stderr.log"
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readonly systemd_services="kubelet kubelet-monitor kube-container-runtime-monitor ${LOG_DUMP_SYSTEMD_SERVICES:-docker}"
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readonly dump_systemd_journal="${LOG_DUMP_SYSTEMD_JOURNAL:-false}"
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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_dump_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=( ${3} )
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# Append "*"
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# The * at the end is needed to also copy rotated logs (which happens
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# in large clusters and long runs).
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files=( "${files[@]/%/*}" )
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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}/${svc}.log" || true
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done
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if [[ "$dump_systemd_journal" == "true" ]]; then
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log-dump-ssh "${node_name}" "sudo journalctl --output=short-precise" > "${dir}/systemd.log" || true
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fi
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else
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files="${kern_logfile} ${files} ${initd_logfiles} ${supervisord_logfiles}"
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fi
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# Try dumping coverage profiles, if it looks like coverage is enabled in the first place.
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if log-dump-ssh "${node_name}" "stat /var/log/kubelet.cov" &> /dev/null; then
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if log-dump-ssh "${node_name}" "command -v docker" &> /dev/null; then
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if [[ "${on_master}" == "true" ]]; then
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run-in-docker-container "${node_name}" "kube-apiserver" "cat /tmp/k8s-kube-apiserver.cov" > "${dir}/kube-apiserver.cov" || true
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run-in-docker-container "${node_name}" "kube-scheduler" "cat /tmp/k8s-kube-scheduler.cov" > "${dir}/kube-scheduler.cov" || true
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run-in-docker-container "${node_name}" "kube-controller-manager" "cat /tmp/k8s-kube-controller-manager.cov" > "${dir}/kube-controller-manager.cov" || true
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else
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run-in-docker-container "${node_name}" "kube-proxy" "cat /tmp/k8s-kube-proxy.cov" > "${dir}/kube-proxy.cov" || true
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fi
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else
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echo "Coverage profiles seem to exist, but cannot be retrieved from inside containers."
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fi
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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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# Execute a command in container $2 on node $1.
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# Uses docker because the container may not ordinarily permit direct execution.
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function run-in-docker-container() {
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local node_name="$1"
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local container="$2"
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shift 2
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log-dump-ssh "${node_name}" "docker exec \"\$(docker ps -f label=io.kubernetes.container.name=${container} --format \"{{.ID}}\")\" $@"
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}
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function dump_masters() {
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local master_names
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if [[ -n "${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_dump_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 ${max_dump_processes} at a time, so
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# wait once we hit that many nodes. This isn't ideal, since one might
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# take much longer than the others, but it should help.
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proc=$((proc - 1))
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if [[ proc -eq 0 ]]; then
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proc=${max_dump_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 ${max_dump_processes} ]]; then
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wait
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fi
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}
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function dump_nodes() {
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local node_names=()
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if [[ -n "${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=${max_dump_processes}
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for node_name in "${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 ${max_dump_processes} at a time, so
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# wait once we hit that many nodes. This isn't ideal, since one might
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# take much longer than the others, but it should help.
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proc=$((proc - 1))
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if [[ proc -eq 0 ]]; then
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proc=${max_dump_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 ${max_dump_processes} ]]; then
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wait
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fi
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}
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# Collect names of nodes which didn't run logexporter successfully.
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# Note: This step is O(#nodes^2) as we check if each node is present in the list of succeeded nodes.
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# Making it linear would add code complexity without much benefit (as it just takes ~1s for 5k nodes).
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# Assumes:
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# NODE_NAMES
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# Sets:
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# NON_LOGEXPORTED_NODES
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function find_non_logexported_nodes() {
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succeeded_nodes=$(gsutil ls ${gcs_artifacts_dir}/logexported-nodes-registry) || return 1
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echo "Successfully listed marker files for successful nodes"
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NON_LOGEXPORTED_NODES=()
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for node in "${NODE_NAMES[@]}"; do
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if [[ ! "${succeeded_nodes}" =~ "${node}" ]]; then
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NON_LOGEXPORTED_NODES+=("${node}")
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fi
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done
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}
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function dump_nodes_with_logexporter() {
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echo "Detecting nodes in the cluster"
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detect-node-names &> /dev/null
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if [[ -z "${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 / 3 ))"
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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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sed -i'' -e "s@{{.DumpSystemdJournal}}@${dump_systemd_journal}@g" "${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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# Periodically fetch list of already logexported nodes to verify
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# if we aren't already done.
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start="$(date +%s)"
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while true; do
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now="$(date +%s)"
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if [[ $((now - start)) -gt ${logexport_sleep_seconds} ]]; then
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echo "Waiting for all nodes to be logexported timed out."
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break
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fi
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if find_non_logexported_nodes; then
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if [[ -z "${NON_LOGEXPORTED_NODES:-}" ]]; then
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break
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fi
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fi
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sleep 15
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done
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# Store logs from logexporter pods to allow debugging log exporting process
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# itself.
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proc=${max_dump_processes}
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"${KUBECTL}" get pods -n "${logexporter_namespace}" -o jsonpath='{range .items[*]}{.metadata.name}{"\t"}{.spec.nodeName}{"\n"}{end}' | while read pod node; do
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echo "Fetching logs from ${pod} running on ${node}"
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mkdir -p ${report_dir}/${node}
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"${KUBECTL}" logs -n "${logexporter_namespace}" ${pod} > ${report_dir}/${node}/${pod}.log &
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# We don't want to run more than ${max_dump_processes} at a time, so
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# wait once we hit that many nodes. This isn't ideal, since one might
|
|
# take much longer than the others, but it should help.
|
|
proc=$((proc - 1))
|
|
if [[ proc -eq 0 ]]; then
|
|
proc=${max_dump_processes}
|
|
wait
|
|
fi
|
|
done
|
|
# Wait for any remaining processes.
|
|
if [[ proc -gt 0 && proc -lt ${max_dump_processes} ]]; then
|
|
wait
|
|
fi
|
|
|
|
# List registry of marker files (of nodes whose logexporter succeeded) from GCS.
|
|
local nodes_succeeded
|
|
for retry in {1..10}; do
|
|
if find_non_logexported_nodes; then
|
|
break
|
|
else
|
|
echo "Attempt ${retry} failed to list marker files for succeessful nodes"
|
|
if [[ "${retry}" == 10 ]]; then
|
|
echo "Final attempt to list marker files failed.. falling back to logdump through SSH"
|
|
"${KUBECTL}" delete namespace "${logexporter_namespace}" || true
|
|
dump_nodes "${NODE_NAMES[@]}"
|
|
return
|
|
fi
|
|
sleep 2
|
|
fi
|
|
done
|
|
|
|
failed_nodes=()
|
|
# The following if is needed, because defaulting for empty arrays
|
|
# seems to treat them as non-empty with single empty string.
|
|
if [[ -n "${NON_LOGEXPORTED_NODES:-}" ]]; then
|
|
for node in "${NON_LOGEXPORTED_NODES[@]:-}"; do
|
|
echo "Logexporter didn't succeed on node ${node}. Queuing it for logdump through SSH."
|
|
failed_nodes+=("${node}")
|
|
done
|
|
fi
|
|
|
|
# Delete the logexporter resources and dump logs for the failed nodes (if any) through SSH.
|
|
"${KUBECTL}" get pods --namespace "${logexporter_namespace}" || true
|
|
"${KUBECTL}" delete namespace "${logexporter_namespace}" || true
|
|
if [[ "${#failed_nodes[@]}" != 0 ]]; then
|
|
echo -e "Dumping logs through SSH for the following nodes:\n${failed_nodes[@]}"
|
|
dump_nodes "${failed_nodes[@]}"
|
|
fi
|
|
}
|
|
|
|
function detect_node_failures() {
|
|
if ! [[ "${gcloud_supported_providers}" =~ "${KUBERNETES_PROVIDER}" ]]; then
|
|
return
|
|
fi
|
|
|
|
detect-node-names
|
|
if [ -z "${INSTANCE_GROUPS:-}" ]; then
|
|
return
|
|
fi
|
|
for group in "${INSTANCE_GROUPS[@]}"; do
|
|
local creation_timestamp=$(gcloud compute instance-groups managed describe \
|
|
"${group}" \
|
|
--project "${PROJECT}" \
|
|
--zone "${ZONE}" \
|
|
--format='value(creationTimestamp)')
|
|
echo "Failures for ${group}"
|
|
gcloud logging read --order=asc \
|
|
--format='table(timestamp,jsonPayload.resource.name,jsonPayload.event_subtype)' \
|
|
--project "${PROJECT}" \
|
|
"resource.type=\"gce_instance\"
|
|
logName=\"projects/${PROJECT}/logs/compute.googleapis.com%2Factivity_log\"
|
|
(jsonPayload.event_subtype=\"compute.instances.hostError\" OR jsonPayload.event_subtype=\"compute.instances.automaticRestart\")
|
|
jsonPayload.resource.name:\"${group}\"
|
|
timestamp >= \"${creation_timestamp}\""
|
|
done
|
|
}
|
|
|
|
function main() {
|
|
setup
|
|
# Copy master logs to artifacts dir locally (through SSH).
|
|
echo "Dumping logs from master locally to '${report_dir}'"
|
|
dump_masters
|
|
if [[ "${DUMP_ONLY_MASTER_LOGS:-}" == "true" ]]; then
|
|
echo "Skipping dumping of node logs"
|
|
return
|
|
fi
|
|
|
|
# Copy logs from nodes to GCS directly or to artifacts dir locally (through SSH).
|
|
if [[ -n "${gcs_artifacts_dir}" ]]; then
|
|
echo "Dumping logs from nodes to GCS directly at '${gcs_artifacts_dir}' using logexporter"
|
|
dump_nodes_with_logexporter
|
|
else
|
|
echo "Dumping logs from nodes locally to '${report_dir}'"
|
|
dump_nodes
|
|
fi
|
|
|
|
detect_node_failures
|
|
}
|
|
|
|
main
|