openstack-helm-infra/mariadb/templates/bin/_backup_mariadb.sh.tpl

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#!/bin/bash
SCOPE=${1:-"all"}
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
source /tmp/backup_main.sh
# Export the variables required by the framework
# Note: REMOTE_BACKUP_ENABLED, STORAGE_POLICY and CONTAINER_NAME are already
# exported.
export DB_NAMESPACE=${MARIADB_POD_NAMESPACE}
export DB_NAME="mariadb"
export LOCAL_DAYS_TO_KEEP=${MARIADB_LOCAL_BACKUP_DAYS_TO_KEEP}
export REMOTE_DAYS_TO_KEEP=${MARIADB_REMOTE_BACKUP_DAYS_TO_KEEP}
export REMOTE_BACKUP_RETRIES=${NUMBER_OF_RETRIES_SEND_BACKUP_TO_REMOTE}
export MIN_DELAY_SEND_REMOTE=${MIN_DELAY_SEND_BACKUP_TO_REMOTE}
export MAX_DELAY_SEND_REMOTE=${MAX_DELAY_SEND_BACKUP_TO_REMOTE}
export ARCHIVE_DIR=${MARIADB_BACKUP_BASE_DIR}/db/${DB_NAMESPACE}/${DB_NAME}/archive
# Dump all the database files to existing $TMP_DIR and save logs to $LOG_FILE
dump_databases_to_directory() {
TMP_DIR=$1
LOG_FILE=$2
SCOPE=${3:-"all"}
MYSQL="mysql \
--defaults-file=/etc/mysql/admin_user.cnf \
--connect-timeout 10"
MYSQLDUMP="mysqldump \
--defaults-file=/etc/mysql/admin_user.cnf"
if [[ "${SCOPE}" == "all" ]]; then
MYSQL_DBNAMES=( $($MYSQL --silent --skip-column-names -e \
"show databases;" | \
grep -ivE 'information_schema|performance_schema|mysql|sys') )
else
if [[ "${SCOPE}" != "information_schema" && "${SCOPE}" != "performance_schema" && "${SCOPE}" != "mysql" && "${SCOPE}" != "sys" ]]; then
MYSQL_DBNAMES=( ${SCOPE} )
else
log ERROR "It is not allowed to backup database ${SCOPE}."
return 1
fi
fi
#check if there is a database to backup, otherwise exit
if [[ -z "${MYSQL_DBNAMES// }" ]]
then
log INFO "There is no database to backup"
return 0
fi
#Create a list of Databases
printf "%s\n" "${MYSQL_DBNAMES[@]}" > $TMP_DIR/db.list
if [[ "${SCOPE}" == "all" ]]; then
#Retrieve and create the GRANT file for all the users
{{- if .Values.manifests.certificates }}
SSL_DSN=";mysql_ssl=1"
SSL_DSN="$SSL_DSN;mysql_ssl_client_key=/etc/mysql/certs/tls.key"
SSL_DSN="$SSL_DSN;mysql_ssl_client_cert=/etc/mysql/certs/tls.crt"
SSL_DSN="$SSL_DSN;mysql_ssl_ca_file=/etc/mysql/certs/ca.crt"
if ! pt-show-grants --defaults-file=/etc/mysql/admin_user.cnf $SSL_DSN \
{{- else }}
if ! pt-show-grants --defaults-file=/etc/mysql/admin_user.cnf \
{{- end }}
2>>"$LOG_FILE" > "$TMP_DIR"/grants.sql; then
log ERROR "Failed to create GRANT for all the users"
return 1
fi
fi
#Retrieve and create the GRANT files per DB
for db in "${MYSQL_DBNAMES[@]}"
do
echo $($MYSQL --skip-column-names -e "select concat('show grants for ',user,';') \
from mysql.db where ucase(db)=ucase('$db');") | \
sed -r "s/show grants for ([a-zA-Z0-9_-]*)/show grants for '\1'/g" | \
$MYSQL --silent --skip-column-names 2>>$LOG_FILE > $TMP_DIR/${db}_grant.sql
if [ "$?" -eq 0 ]
then
sed -i 's/$/;/' $TMP_DIR/${db}_grant.sql
else
log ERROR "Failed to create GRANT files for ${db}"
return 1
fi
done
#Dumping the database
SQL_FILE=mariadb.$MARIADB_POD_NAMESPACE.${SCOPE}
$MYSQLDUMP $MYSQL_BACKUP_MYSQLDUMP_OPTIONS "${MYSQL_DBNAMES[@]}" \
> $TMP_DIR/${SQL_FILE}.sql 2>>$LOG_FILE
if [[ $? -eq 0 && -s $TMP_DIR/${SQL_FILE}.sql ]]
then
log INFO "Database(s) dumped successfully. (SCOPE = ${SCOPE})"
return 0
else
log ERROR "Backup failed and need attention. (SCOPE = ${SCOPE})"
return 1
fi
}
# functions from mariadb-verifier chart
get_time_delta_secs () {
second_delta=0
input_date_second=$( date --date="$1" +%s )
if [ -n "$input_date_second" ]; then
current_date=$( date +"%Y-%m-%dT%H:%M:%SZ" )
current_date_second=$( date --date="$current_date" +%s )
((second_delta=current_date_second-input_date_second))
if [ "$second_delta" -lt 0 ]; then
second_delta=0
fi
fi
echo $second_delta
}
check_data_freshness () {
archive_file=$(basename "$1")
archive_date=$(echo "$archive_file" | cut -d'.' -f 4)
SCOPE=$2
if [[ "${SCOPE}" != "all" ]]; then
log "Data freshness check is skipped for individual database."
return 0
fi
log "Checking for data freshness in the backups..."
# Get some idea of which database.table has changed in the last 30m
# Excluding the system DBs and aqua_test_database
#
changed_tables=$(${MYSQL_LIVE} -e "select TABLE_SCHEMA,TABLE_NAME from \
information_schema.tables where UPDATE_TIME >= SUBTIME(now(),'00:30:00') AND TABLE_SCHEMA \
NOT IN('information_schema', 'mysql', 'performance_schema', 'sys', 'aqua_test_database');" | \
awk '{print $1 "." $2}')
if [ -n "${changed_tables}" ]; then
delta_secs=$(get_time_delta_secs "$archive_date")
age_offset={{ .Values.conf.backup.validateData.ageOffset }}
((age_threshold=delta_secs+age_offset))
data_freshness=false
skipped_freshness=false
for table in ${changed_tables}; do
tab_schema=$(echo "$table" | awk -F. '{print $1}')
tab_name=$(echo "$table" | awk -F. '{print $2}')
local_table_existed=$(${MYSQL_LOCAL_SHORT_SILENT} -e "select TABLE_SCHEMA,TABLE_NAME from \
INFORMATION_SCHEMA.TABLES where TABLE_SCHEMA=\"${tab_schema}\" AND TABLE_NAME=\"${tab_name}\";")
if [ -n "$local_table_existed" ]; then
# TODO: If last updated field of a table structure has different
# patterns (updated/timstamp), it may be worth to parameterize the patterns.
datetime=$(${MYSQL_LOCAL_SHORT_SILENT} -e "describe ${table};" | \
awk '(/updated/ || /timestamp/) && /datetime/ {print $1}')
if [ -n "${datetime}" ]; then
data_ages=$(${MYSQL_LOCAL_SHORT_SILENT} -e "select \
time_to_sec(timediff(now(),${datetime})) from ${table} where ${datetime} is not null order by 1 limit 10;")
for age in $data_ages; do
if [ "$age" -le $age_threshold ]; then
data_freshness=true
break
fi
done
# As long as there is an indication of data freshness, no need to check further
if [ "$data_freshness" = true ] ; then
break
fi
else
skipped_freshness=true
log "No indicator to determine data freshness for table $table. Skipped data freshness check."
# Dumping out table structure to determine if enhancement is needed to include this table
debug_info=$(${MYSQL_LOCAL} --skip-column-names -e "describe ${table};" | awk '{print $2 " " $1}')
log "$debug_info" "DEBUG"
fi
else
log "Table $table doesn't exist in local database"
skipped_freshness=true
fi
done
if [ "$data_freshness" = true ] ; then
log "Database passed integrity (data freshness) check."
else
if [ "$skipped_freshness" = false ] ; then
log "Local backup database restore failed integrity check." "ERROR"
log "The backup may not have captured the up-to-date data." "INFO"
return 1
fi
fi
else
log "No tables changed in this backup. Skipped data freshness check as the"
log "check should have been performed by previous validation runs."
fi
return 0
}
cleanup_local_databases () {
old_local_dbs=$(${MYSQL_LOCAL_SHORT_SILENT} -e 'show databases;' | \
grep -ivE 'information_schema|performance_schema|mysql|sys' || true)
for db in $old_local_dbs; do
${MYSQL_LOCAL_SHORT_SILENT} -e "drop database $db;"
done
}
list_archive_dir () {
archive_dir_content=$(ls -1R "$ARCHIVE_DIR")
if [ -n "$archive_dir_content" ]; then
log "Content of $ARCHIVE_DIR"
log "${archive_dir_content}"
fi
}
remove_remote_archive_file () {
archive_file=$(basename "$1")
token_req_file=$(mktemp --suffix ".json")
header_file=$(mktemp)
resp_file=$(mktemp --suffix ".json")
http_resp="404"
HEADER_CONTENT_TYPE="Content-Type: application/json"
HEADER_ACCEPT="Accept: application/json"
cat << JSON_EOF > "$token_req_file"
{
"auth": {
"identity": {
"methods": [
"password"
],
"password": {
"user": {
"domain": {
"name": "${OS_USER_DOMAIN_NAME}"
},
"name": "${OS_USERNAME}",
"password": "${OS_PASSWORD}"
}
}
},
"scope": {
"project": {
"domain": {
"name": "${OS_PROJECT_DOMAIN_NAME}"
},
"name": "${OS_PROJECT_NAME}"
}
}
}
}
JSON_EOF
http_resp=$(curl -s -X POST "$OS_AUTH_URL/auth/tokens" -H "${HEADER_CONTENT_TYPE}" \
-H "${HEADER_ACCEPT}" -d @"${token_req_file}" -D "$header_file" -o "$resp_file" -w "%{http_code}")
if [ "$http_resp" = "201" ]; then
OS_TOKEN=$(grep -i "x-subject-token" "$header_file" | cut -d' ' -f2 | tr -d "\r")
if [ -n "$OS_TOKEN" ]; then
OS_OBJ_URL=$(python3 -c "import json,sys;print([[ep['url'] for ep in obj['endpoints'] if ep['interface']=='public'] for obj in json.load(sys.stdin)['token']['catalog'] if obj['type']=='object-store'][0][0])" < "$resp_file")
if [ -n "$OS_OBJ_URL" ]; then
http_resp=$(curl -s -X DELETE "$OS_OBJ_URL/$CONTAINER_NAME/$archive_file" \
-H "${HEADER_CONTENT_TYPE}" -H "${HEADER_ACCEPT}" \
-H "X-Auth-Token: ${OS_TOKEN}" -D "$header_file" -o "$resp_file" -w "%{http_code}")
fi
fi
fi
if [ "$http_resp" == "404" ] ; then
log "Failed to cleanup remote backup. Container object $archive_file is not on RGW."
return 1
fi
if [ "$http_resp" != "204" ] ; then
log "Failed to cleanup remote backup. Cannot delete container object $archive_file" "ERROR"
cat "$header_file"
cat "$resp_file"
fi
return 0
}
handle_bad_archive_file () {
archive_file=$1
if [ ! -d "$BAD_ARCHIVE_DIR" ]; then
mkdir -p "$BAD_ARCHIVE_DIR"
fi
# Move the file to quarantine directory such that
# file won't be used for restore in case of recovery
#
log "Moving $i to $BAD_ARCHIVE_DIR..."
mv "$i" "$BAD_ARCHIVE_DIR"
log "Removing $i from remote RGW..."
if remove_remote_archive_file "$i"; then
log "File $i has been successfully removed from RGW."
else
log "FIle $i cannot be removed form RGW." "ERROR"
return 1
fi
# Atmost only three bad files are kept. Deleting the oldest if
# number of files exceeded the threshold.
#
bad_files=$(find "$BAD_ARCHIVE_DIR" -name "*.tar.gz" 2>/dev/null | wc -l)
if [ "$bad_files" -gt 3 ]; then
((bad_files=bad_files-3))
delete_files=$(find "$BAD_ARCHIVE_DIR" -name "*.tar.gz" 2>/dev/null | sort | head --lines=$bad_files)
for b in $delete_files; do
log "Deleting $b..."
rm -f "${b}"
done
fi
return 0
}
cleanup_old_validation_result_file () {
clean_files=$(find "$ARCHIVE_DIR" -maxdepth 1 -name "*.passed" 2>/dev/null)
for d in $clean_files; do
archive_file=${d/.passed}
if [ ! -f "$archive_file" ]; then
log "Deleting $d as its associated archive file $archive_file nolonger existed."
rm -f "${d}"
fi
done
}
validate_databases_backup () {
archive_file=$1
SCOPE=${2:-"all"}
restore_log='/tmp/restore_error.log'
tmp_dir=$(mktemp -d)
rm -f $restore_log
cd "$tmp_dir"
log "Decompressing archive $archive_file..."
if ! tar zxvf - < "$archive_file" 1>/dev/null; then
log "Database restore from local backup failed. Archive decompression failed." "ERROR"
return 1
fi
db_list_file="$tmp_dir/db.list"
if [[ -e "$db_list_file" ]]; then
dbs=$(sort < "$db_list_file" | grep -ivE sys | tr '\n' ' ')
else
dbs=" "
fi
sql_file="${tmp_dir}/mariadb.${MARIADB_POD_NAMESPACE}.${SCOPE}.sql"
if [[ "${SCOPE}" == "all" ]]; then
grant_file="${tmp_dir}/grants.sql"
else
grant_file="${tmp_dir}/${SCOPE}_grant.sql"
fi
if [[ -f $sql_file ]]; then
if $MYSQL_LOCAL < "$sql_file" 2>$restore_log; then
local_dbs=$(${MYSQL_LOCAL_SHORT_SILENT} -e 'show databases;' | \
grep -ivE 'information_schema|performance_schema|mysql|sys' | sort | tr '\n' ' ')
if [ "$dbs" = "$local_dbs" ]; then
log "Databases restored successful."
else
log "Database restore from local backup failed. Database mismatched between local backup and local server" "ERROR"
log "Databases restored on local server: $local_dbs" "DEBUG"
log "Databases in the local backup: $dbs" "DEBUG"
return 1
fi
else
log "Database restore from local backup failed. $dbs" "ERROR"
cat $restore_log
return 1
fi
if [[ -f $grant_file ]]; then
if $MYSQL_LOCAL < "$grant_file" 2>$restore_log; then
if ! $MYSQL_LOCAL -e 'flush privileges;'; then
log "Database restore from local backup failed. Failed to flush privileges." "ERROR"
return 1
fi
log "Databases permission restored successful."
else
log "Database restore from local backup failed. Databases permission failed to restore." "ERROR"
cat "$restore_log"
cat "$grant_file"
log "Local DBs: $local_dbs" "DEBUG"
return 1
fi
else
log "Database restore from local backup failed. There is no permission file available" "ERROR"
return 1
fi
if ! check_data_freshness "$archive_file" ${SCOPE}; then
# Log has already generated during check data freshness
return 1
fi
else
log "Database restore from local backup failed. There is no database file available to restore from" "ERROR"
return 1
fi
return 0
}
# end of functions form mariadb verifier chart
# Verify all the databases backup archives
verify_databases_backup_archives() {
SCOPE=${1:-"all"}
# verification code
export DB_NAME="mariadb"
export ARCHIVE_DIR=${MARIADB_BACKUP_BASE_DIR}/db/${MARIADB_POD_NAMESPACE}/${DB_NAME}/archive
export BAD_ARCHIVE_DIR=${ARCHIVE_DIR}/quarantine
export MYSQL_OPTS="--silent --skip-column-names"
export MYSQL_LIVE="mysql ${MYSQL_OPTS}"
export MYSQL_LOCAL_OPTS=""
export MYSQL_LOCAL_SHORT="mysql ${MYSQL_LOCAL_OPTS} --connect-timeout 2"
export MYSQL_LOCAL_SHORT_SILENT="${MYSQL_LOCAL_SHORT} ${MYSQL_OPTS}"
export MYSQL_LOCAL="mysql ${MYSQL_LOCAL_OPTS} --connect-timeout 10"
max_wait={{ .Values.conf.mariadb_server.setup_wait.iteration }}
duration={{ .Values.conf.mariadb_server.setup_wait.duration }}
counter=0
dbisup=false
log "Waiting for Mariadb backup verification server to start..."
# During Mariadb init/startup process, a temporary server is startup
# and shutdown prior to starting up the normal server.
# To avoid prematurely determine server availability, lets snooze
# a bit to give time for the process to complete prior to issue
# mysql commands.
#
while [ $counter -lt $max_wait ]; do
if ! $MYSQL_LOCAL_SHORT -e 'select 1' > /dev/null 2>&1 ; then
sleep $duration
((counter=counter+1))
else
# Lets sleep for an additional duration just in case async
# init takes a bit more time to complete.
#
sleep $duration
dbisup=true
counter=$max_wait
fi
done
if ! $dbisup; then
log "Mariadb backup verification server is not running" "ERROR"
return 1
fi
# During Mariadb init process, a test database will be briefly
# created and deleted. Adding to the exclusion list for some
# edge cases
#
clean_db=$(${MYSQL_LOCAL_SHORT_SILENT} -e 'show databases;' | \
grep -ivE 'information_schema|performance_schema|mysql|test|sys' || true)
if [[ -z "${clean_db// }" ]]; then
log "Clean Server is up and running"
else
cleanup_local_databases
log "Old databases found on the Mariadb backup verification server were cleaned."
clean_db=$(${MYSQL_LOCAL_SHORT_SILENT} -e 'show databases;' | \
grep -ivE 'information_schema|performance_schema|mysql|test|sys' || true)
if [[ -z "${clean_db// }" ]]; then
log "Clean Server is up and running"
else
log "Cannot clean old databases on verification server." "ERROR"
return 1
fi
log "The server is ready for verification."
fi
# Starting with 10.4.13, new definer mariadb.sys was added. However, mariadb.sys was deleted
# during init mariadb as it was not on the exclusion list. This corrupted the view of mysql.user.
# Insert the tuple back to avoid other similar issues with error i.e
# The user specified as a definer ('mariadb.sys'@'localhost') does not exist
#
# Before insert the tuple mentioned above, we should make sure that the MariaDB version is 10.4.+
mariadb_version=$($MYSQL_LOCAL_SHORT -e "status" | grep -E '^Server\s+version:')
log "Current database ${mariadb_version}"
if [[ ! -z ${mariadb_version} && -z $(grep '10.2' <<< ${mariadb_version}}) ]]; then
if [[ -z $(grep 'mariadb.sys' <<< $($MYSQL_LOCAL_SHORT mysql -e "select * from global_priv where user='mariadb.sys'")) ]]; then
$MYSQL_LOCAL_SHORT -e "insert into mysql.global_priv values ('localhost','mariadb.sys',\
'{\"access\":0,\"plugin\":\"mysql_native_password\",\"authentication_string\":\"\",\"account_locked\":true,\"password_last_changed\":0}');"
$MYSQL_LOCAL_SHORT -e 'flush privileges;'
fi
fi
# Ensure archive dir existed
if [ -d "$ARCHIVE_DIR" ]; then
# List archive dir before
list_archive_dir
# Ensure the local databases are clean for each restore validation
#
cleanup_local_databases
if [[ "${SCOPE}" == "all" ]]; then
archive_files=$(find "$ARCHIVE_DIR" -maxdepth 1 -name "*.tar.gz" 2>/dev/null | sort)
for i in $archive_files; do
archive_file_passed=$i.passed
if [ ! -f "$archive_file_passed" ]; then
log "Validating archive file $i..."
if validate_databases_backup "$i"; then
touch "$archive_file_passed"
else
if handle_bad_archive_file "$i"; then
log "File $i has been removed from RGW."
else
log "File $i cannot be removed from RGW." "ERROR"
return 1
fi
fi
fi
done
else
archive_files=$(find "$ARCHIVE_DIR" -maxdepth 1 -name "*.tar.gz" 2>/dev/null | grep "${SCOPE}" | sort)
for i in $archive_files; do
archive_file_passed=$i.passed
if [ ! -f "$archive_file_passed" ]; then
log "Validating archive file $i..."
if validate_databases_backup "${i}" "${SCOPE}"; then
touch "$archive_file_passed"
else
if handle_bad_archive_file "$i"; then
log "File $i has been removed from RGW."
else
log "File $i cannot be removed from RGW." "ERROR"
return 1
fi
fi
fi
done
fi
# Cleanup passed files if its archive file nolonger existed
cleanup_old_validation_result_file
# List archive dir after
list_archive_dir
fi
return 0
}
# Call main program to start the database backup
backup_databases ${SCOPE}