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This commit is contained in:
Serguei Bezverkhi
2018-03-06 17:33:18 -05:00
parent 4b3ebc171b
commit e9033989a0
5854 changed files with 248382 additions and 119809 deletions
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173
vendor/k8s.io/kubernetes/cluster/images/etcd/migrate-if-needed.sh generated vendored
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@ -18,7 +18,7 @@
# This script performs etcd upgrade based on the following environmental
# variables:
# TARGET_STORAGE - API of etcd to be used (supported: 'etcd2', 'etcd3')
# TARGET_VERSION - etcd release to be used (supported: '2.2.1', '2.3.7', '3.0.17')
# TARGET_VERSION - etcd release to be used (supported: '2.2.1', '2.3.7', '3.0.17', '3.1.11', '3.2.14')
# DATA_DIRECTORY - directory with etcd data
#
# The current etcd version and storage format is detected based on the
@ -28,7 +28,8 @@
# The update workflow support the following upgrade steps:
# - 2.2.1/etcd2 -> 2.3.7/etcd2
# - 2.3.7/etcd2 -> 3.0.17/etcd2
# - 3.0.17/etcd2 -> 3.0.17/etcd3
# - 3.0.17/etcd3 -> 3.1.11/etcd3
# - 3.1.11/etcd3 -> 3.2.14/etcd3
#
# NOTE: The releases supported in this script has to match release binaries
# present in the etcd image (to make this script work correctly).
@ -39,6 +40,72 @@
set -o errexit
set -o nounset
source $(dirname "$0")/start-stop-etcd.sh
# Rollback to previous minor version of etcd 3.x, if needed.
#
# Warning: For HA etcd clusters (any cluster with more than one member), all members must be stopped before rolling back, zero
# downtime rollbacks are not supported.
rollback_etcd3_minor_version() {
if [ ${TARGET_MINOR_VERSION} != $((${CURRENT_MINOR_VERSION}-1)) ]; then
echo "Rollback from ${CURRENT_VERSION} to ${TARGET_VERSION} not supported, only rollbacks to the previous minor version are supported."
exit 1
fi
echo "Performing etcd ${CURRENT_VERSION} -> ${TARGET_VERSION} rollback"
ROLLBACK_BACKUP_DIR="${DATA_DIRECTORY}.bak"
rm -rf "${ROLLBACK_BACKUP_DIR}"
SNAPSHOT_FILE="${DATA_DIRECTORY}.snapshot.db"
rm -rf "${SNAPSHOT_FILE}"
ETCD_CMD="/usr/local/bin/etcd-${CURRENT_VERSION}"
ETCDCTL_CMD="/usr/local/bin/etcdctl-${CURRENT_VERSION}"
# Start CURRENT_VERSION of etcd.
START_VERSION="${CURRENT_VERSION}"
START_STORAGE="${CURRENT_STORAGE}"
echo "Starting etcd version ${START_VERSION} to capture rollback snapshot."
if ! start_etcd; then
echo "Unable to automatically downgrade etcd: starting etcd version ${START_VERSION} to capture rollback snapshot failed."
echo "See https://coreos.com/etcd/docs/3.2.13/op-guide/recovery.html for manual downgrade options."
exit 1
else
ETCDCTL_API=3 ${ETCDCTL_CMD} snapshot --endpoints "http://127.0.0.1:${ETCD_PORT}" save "${SNAPSHOT_FILE}"
fi
stop_etcd
# Backup the data before rolling back.
mv "${DATA_DIRECTORY}" "${ROLLBACK_BACKUP_DIR}"
ETCDCTL_CMD="/usr/local/bin/etcdctl-${TARGET_VERSION}"
NAME="etcd-$(hostname)"
ETCDCTL_API=3 ${ETCDCTL_CMD} snapshot restore "${SNAPSHOT_FILE}" \
--data-dir "${DATA_DIRECTORY}" --name "${NAME}" --initial-cluster "${INITIAL_CLUSTER}"
CURRENT_VERSION="${TARGET_VERSION}"
echo "${CURRENT_VERSION}/${CURRENT_STORAGE}" > "${DATA_DIRECTORY}/${VERSION_FILE}"
}
# Rollback from "3.0.x" version in 'etcd3' mode to "2.2.1" version in 'etcd2' mode, if needed.
rollback_to_etcd2() {
if [ "$(echo ${CURRENT_VERSION} | cut -c1-4)" != "3.0." -o "${TARGET_VERSION}" != "2.2.1" ]; then
echo "etcd3 -> etcd2 downgrade is supported only between 3.0.x and 2.2.1"
return 0
fi
echo "Backup and remove all existing v2 data"
ROLLBACK_BACKUP_DIR="${DATA_DIRECTORY}.bak"
rm -rf "${ROLLBACK_BACKUP_DIR}"
mkdir -p "${ROLLBACK_BACKUP_DIR}"
cp -r "${DATA_DIRECTORY}" "${ROLLBACK_BACKUP_DIR}"
echo "Performing etcd3 -> etcd2 rollback"
${ROLLBACK} --data-dir "${DATA_DIRECTORY}"
if [ "$?" -ne "0" ]; then
echo "Rollback to etcd2 failed"
exit 1
fi
CURRENT_STORAGE="etcd2"
CURRENT_VERSION="2.2.1"
echo "${CURRENT_VERSION}/${CURRENT_STORAGE}" > "${DATA_DIRECTORY}/${VERSION_FILE}"
}
if [ -z "${TARGET_STORAGE:-}" ]; then
echo "TARGET_STORAGE variable unset - unexpected failure"
exit 1
@ -51,6 +118,10 @@ if [ -z "${DATA_DIRECTORY:-}" ]; then
echo "DATA_DIRECTORY variable unset - unexpected failure"
exit 1
fi
if [ -z "${INITIAL_CLUSTER:-}" ]; then
echo "Warn: INITIAL_CLUSTER variable unset - defaulting to etcd-$(hostname)=http://localhost:2380"
INITIAL_CLUSTER="etcd-$(hostname)=http://localhost:2380"
fi
echo "$(date +'%Y-%m-%d %H:%M:%S') Detecting if migration is needed"
@ -68,7 +139,7 @@ fi
# NOTE: SUPPORTED_VERSION has to match release binaries present in the
# etcd image (to make this script work correctly).
# We cannot use array since sh doesn't support it.
SUPPORTED_VERSIONS_STRING="2.2.1 2.3.7 3.0.17"
SUPPORTED_VERSIONS_STRING="2.2.1 2.3.7 3.0.17 3.1.11 3.2.14"
SUPPORTED_VERSIONS=$(echo "${SUPPORTED_VERSIONS_STRING}" | tr " " "\n")
VERSION_FILE="version.txt"
@ -96,58 +167,6 @@ if [ -z "$(ls -A ${DATA_DIRECTORY})" ]; then
exit 0
fi
# Starts 'etcd' version ${START_VERSION} and writes to it:
# 'etcd_version' -> "${START_VERSION}"
# Successful write confirms that etcd is up and running.
# Sets ETCD_PID at the end.
# Returns 0 if etcd was successfully started, non-0 otherwise.
start_etcd() {
# Use random ports, so that apiserver cannot connect to etcd.
ETCD_PORT=18629
ETCD_PEER_PORT=2380
# Avoid collisions between etcd and event-etcd.
case "${DATA_DIRECTORY}" in
*event*)
ETCD_PORT=18631
ETCD_PEER_PORT=2381
;;
esac
local ETCD_CMD="${ETCD:-/usr/local/bin/etcd-${START_VERSION}}"
local ETCDCTL_CMD="${ETCDCTL:-/usr/local/bin/etcdctl-${START_VERSION}}"
local API_VERSION="$(echo ${START_STORAGE} | cut -c5-5)"
if [ "${API_VERSION}" = "2" ]; then
ETCDCTL_CMD="${ETCDCTL_CMD} --debug --endpoint=http://127.0.0.1:${ETCD_PORT} set"
else
ETCDCTL_CMD="${ETCDCTL_CMD} --endpoints=http://127.0.0.1:${ETCD_PORT} put"
fi
${ETCD_CMD} \
--name="etcd-$(hostname)" \
--debug \
--data-dir=${DATA_DIRECTORY} \
--listen-client-urls http://127.0.0.1:${ETCD_PORT} \
--advertise-client-urls http://127.0.0.1:${ETCD_PORT} \
--listen-peer-urls http://127.0.0.1:${ETCD_PEER_PORT} \
--initial-advertise-peer-urls http://127.0.0.1:${ETCD_PEER_PORT} &
ETCD_PID=$!
# Wait until we can write to etcd.
for i in $(seq 240); do
sleep 0.5
ETCDCTL_API="${API_VERSION}" ${ETCDCTL_CMD} 'etcd_version' ${START_VERSION}
if [ "$?" -eq "0" ]; then
echo "Etcd on port ${ETCD_PORT} is up."
return 0
fi
done
echo "Timeout while waiting for etcd on port ${ETCD_PORT}"
return 1
}
# Stops etcd with ${ETCD_PID} pid.
stop_etcd() {
kill "${ETCD_PID-}" >/dev/null 2>&1 || :
wait "${ETCD_PID-}" >/dev/null 2>&1 || :
}
ATTACHLEASE="${ATTACHLEASE:-/usr/local/bin/attachlease}"
ROLLBACK="${ROLLBACK:-/usr/local/bin/rollback}"
@ -163,6 +182,24 @@ if [ "${CURRENT_VERSION}" = "2.2.1" -a "${CURRENT_VERSION}" != "${TARGET_VERSION
echo "Backup done in ${BACKUP_DIR}"
fi
CURRENT_MINOR_VERSION="$(echo ${CURRENT_VERSION} | awk -F'.' '{print $2}')"
TARGET_MINOR_VERSION="$(echo ${TARGET_VERSION} | awk -F'.' '{print $2}')"
# "rollback-if-needed"
case "${CURRENT_STORAGE}-${TARGET_STORAGE}" in
"etcd3-etcd3")
[ ${TARGET_MINOR_VERSION} -lt ${CURRENT_MINOR_VERSION} ] && rollback_etcd3_minor_version
break
;;
"etcd3-etcd2")
rollback_to_etcd2
break
;;
*)
break
;;
esac
# Do the roll-forward migration if needed.
# The migration goes as following:
# 1. for all versions starting one after the current version of etcd
@ -227,7 +264,7 @@ for step in ${SUPPORTED_VERSIONS}; do
echo "Starting etcd ${step} in v3 mode failed"
exit 1
fi
${ETCDCTL_CMD} rm --recursive "${ETCD_DATA_PREFIX}"
${ETCDCTL_CMD} --endpoints "http://127.0.0.1:${ETCD_PORT}" rm --recursive "${ETCD_DATA_PREFIX}"
# Kill etcd and wait until this is down.
stop_etcd
echo "Successfully remove v2 data"
@ -239,28 +276,4 @@ for step in ${SUPPORTED_VERSIONS}; do
fi
done
# Do the rollback of needed.
# NOTE: Rollback is only supported from "3.0.x" version in 'etcd3' mode to
# "2.2.1" version in 'etcd2' mode.
if [ "${CURRENT_STORAGE}" = "etcd3" -a "${TARGET_STORAGE}" = "etcd2" ]; then
if [ "$(echo ${CURRENT_VERSION} | cut -c1-4)" != "3.0." -o "${TARGET_VERSION}" != "2.2.1" ]; then
echo "etcd3 -> etcd2 downgrade is supported only between 3.0.x and 2.2.1"
return 0
fi
echo "Backup and remove all existing v2 data"
ROLLBACK_BACKUP_DIR="${DATA_DIRECTORY}.bak"
rm -rf "${ROLLBACK_BACKUP_DIR}"
mkdir -p "${ROLLBACK_BACKUP_DIR}"
cp -r "${DATA_DIRECTORY}" "${ROLLBACK_BACKUP_DIR}"
echo "Performing etcd3 -> etcd2 rollback"
${ROLLBACK} --data-dir "${DATA_DIRECTORY}"
if [ "$?" -ne "0" ]; then
echo "Rollback to etcd2 failed"
exit 1
fi
CURRENT_STORAGE="etcd2"
CURRENT_VERSION="2.2.1"
echo "${CURRENT_VERSION}/${CURRENT_STORAGE}" > "${DATA_DIRECTORY}/${VERSION_FILE}"
fi
echo "$(date +'%Y-%m-%d %H:%M:%S') Migration finished"