https://github.com/docker-library/mysql 可去下载构建镜像的文件。
1. 构建master镜像
1.1 Dockerfile
#
# NOTE: THIS DOCKERFILE IS GENERATED VIA "apply-templates.sh"
#
# PLEASE DO NOT EDIT IT DIRECTLY.
#
FROM debian:buster-slim
# add our user and group first to make sure their IDs get assigned consistently, regardless of whatever dependencies get added
RUN groupadd -r mysql && useradd -r -g mysql mysql
RUN apt-get update && apt-get install -y --no-install-recommends gnupg dirmngr && rm -rf /var/lib/apt/lists/*
# add gosu for easy step-down from root
# https://github.com/tianon/gosu/releases
ENV GOSU_VERSION 1.14
RUN set -eux; \
savedAptMark="$(apt-mark showmanual)"; \
apt-get update; \
apt-get install -y --no-install-recommends ca-certificates wget; \
rm -rf /var/lib/apt/lists/*; \
dpkgArch="$(dpkg --print-architecture | awk -F- '{ print $NF }')"; \
wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$dpkgArch"; \
wget -O /usr/local/bin/gosu.asc "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$dpkgArch.asc"; \
export GNUPGHOME="$(mktemp -d)"; \
gpg --batch --keyserver hkps://keys.openpgp.org --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4; \
gpg --batch --verify /usr/local/bin/gosu.asc /usr/local/bin/gosu; \
gpgconf --kill all; \
rm -rf "$GNUPGHOME" /usr/local/bin/gosu.asc; \
apt-mark auto '.*' > /dev/null; \
[ -z "$savedAptMark" ] || apt-mark manual $savedAptMark > /dev/null; \
apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
chmod +x /usr/local/bin/gosu; \
gosu --version; \
gosu nobody true
RUN mkdir /docker-entrypoint-initdb.d
RUN apt-get update && apt-get install -y --no-install-recommends \
# for MYSQL_RANDOM_ROOT_PASSWORD
pwgen \
# for mysql_ssl_rsa_setup
openssl \
# FATAL ERROR: please install the following Perl modules before executing /usr/local/mysql/scripts/mysql_install_db:
# File::Basename
# File::Copy
# Sys::Hostname
# Data::Dumper
perl \
# install "xz-utils" for .sql.xz docker-entrypoint-initdb.d files
xz-utils \
&& rm -rf /var/lib/apt/lists/*
RUN set -ex; \
# gpg: key 5072E1F5: public key "MySQL Release Engineering <mysql-build@oss.oracle.com>" imported
key='A4A9406876FCBD3C456770C88C718D3B5072E1F5'; \
export GNUPGHOME="$(mktemp -d)"; \
gpg --batch --keyserver keyserver.ubuntu.com --recv-keys "$key"; \
gpg --batch --export "$key" > /etc/apt/trusted.gpg.d/mysql.gpg; \
gpgconf --kill all; \
rm -rf "$GNUPGHOME"; \
apt-key list > /dev/null
ENV MYSQL_MAJOR 8.0
ENV MYSQL_VERSION 8.0.27-1debian10
RUN echo 'deb http://repo.mysql.com/apt/debian/ buster mysql-8.0' > /etc/apt/sources.list.d/mysql.list
# the "/var/lib/mysql" stuff here is because the mysql-server postinst doesn't have an explicit way to disable the mysql_install_db codepath besides having a database already "configured" (ie, stuff in /var/lib/mysql/mysql)
# also, we set debconf keys to make APT a little quieter
RUN { \
echo mysql-community-server mysql-community-server/data-dir select ''; \
echo mysql-community-server mysql-community-server/root-pass password ''; \
echo mysql-community-server mysql-community-server/re-root-pass password ''; \
echo mysql-community-server mysql-community-server/remove-test-db select false; \
} | debconf-set-selections \
&& apt-get update \
&& apt-get install -y \
mysql-community-client="${MYSQL_VERSION}" \
mysql-community-server-core="${MYSQL_VERSION}" \
&& rm -rf /var/lib/apt/lists/* \
&& rm -rf /var/lib/mysql && mkdir -p /var/lib/mysql /var/run/mysqld \
&& chown -R mysql:mysql /var/lib/mysql /var/run/mysqld \
# ensure that /var/run/mysqld (used for socket and lock files) is writable regardless of the UID our mysqld instance ends up having at runtime
&& chmod 1777 /var/run/mysqld /var/lib/mysql
VOLUME /var/lib/mysql
ENV AUTO_RUN_DIR /docker-entrypoint-initdb.d
# Config files
COPY config/ /etc/mysql/
COPY docker-entrypoint.sh /usr/local/bin/
COPY init.sh $AUTO_RUN_DIR/
RUN chmod a+x $AUTO_RUN_DIR/init.sh
RUN ln -s usr/local/bin/docker-entrypoint.sh /entrypoint.sh # backwards compat
ENTRYPOINT ["docker-entrypoint.sh"]
EXPOSE 3306 33060
CMD ["mysqld"]
1.2 docker-entrypoint.sh
#!/bin/bash
set -eo pipefail
shopt -s nullglob
# logging functions
mysql_log() {
local type="$1"; shift
# accept argument string or stdin
local text="$*"; if [ "$#" -eq 0 ]; then text="$(cat)"; fi
local dt; dt="$(date --rfc-3339=seconds)"
printf '%s [%s] [Entrypoint]: %s\n' "$dt" "$type" "$text"
}
mysql_note() {
mysql_log Note "$@"
}
mysql_warn() {
mysql_log Warn "$@" >&2
}
mysql_error() {
mysql_log ERROR "$@" >&2
exit 1
}
# usage: file_env VAR [DEFAULT]
# ie: file_env 'XYZ_DB_PASSWORD' 'example'
# (will allow for "$XYZ_DB_PASSWORD_FILE" to fill in the value of
# "$XYZ_DB_PASSWORD" from a file, especially for Docker's secrets feature)
file_env() {
local var="$1"
local fileVar="${var}_FILE"
local def="${2:-}"
if [ "${!var:-}" ] && [ "${!fileVar:-}" ]; then
mysql_error "Both $var and $fileVar are set (but are exclusive)"
fi
local val="$def"
if [ "${!var:-}" ]; then
val="${!var}"
elif [ "${!fileVar:-}" ]; then
val="$(< "${!fileVar}")"
fi
export "$var"="$val"
unset "$fileVar"
}
# check to see if this file is being run or sourced from another script
_is_sourced() {
# https://unix.stackexchange.com/a/215279
[ "${#FUNCNAME[@]}" -ge 2 ] \
&& [ "${FUNCNAME[0]}" = '_is_sourced' ] \
&& [ "${FUNCNAME[1]}" = 'source' ]
}
# usage: docker_process_init_files [file [file [...]]]
# ie: docker_process_init_files /always-initdb.d/*
# process initializer files, based on file extensions
docker_process_init_files() {
# mysql here for backwards compatibility "${mysql[@]}"
mysql=( docker_process_sql )
echo
local f
for f; do
case "$f" in
*.sh)
# https://github.com/docker-library/postgres/issues/450#issuecomment-393167936
# https://github.com/docker-library/postgres/pull/452
if [ -x "$f" ]; then
mysql_note "$0: running $f"
"$f"
else
mysql_note "$0: sourcing $f"
. "$f"
fi
;;
*.sql) mysql_note "$0: running $f"; docker_process_sql < "$f"; echo ;;
*.sql.gz) mysql_note "$0: running $f"; gunzip -c "$f" | docker_process_sql; echo ;;
*.sql.xz) mysql_note "$0: running $f"; xzcat "$f" | docker_process_sql; echo ;;
*) mysql_warn "$0: ignoring $f" ;;
esac
echo
done
}
# arguments necessary to run "mysqld --verbose --help" successfully (used for testing configuration validity and for extracting default/configured values)
_verboseHelpArgs=(
--verbose --help
--log-bin-index="$(mktemp -u)" # https://github.com/docker-library/mysql/issues/136
)
mysql_check_config() {
local toRun=( "$@" "${_verboseHelpArgs[@]}" ) errors
if ! errors="$("${toRun[@]}" 2>&1 >/dev/null)"; then
mysql_error $'mysqld failed while attempting to check config\n\tcommand was: '"${toRun[*]}"$'\n\t'"$errors"
fi
}
# Fetch value from server config
# We use mysqld --verbose --help instead of my_print_defaults because the
# latter only show values present in config files, and not server defaults
mysql_get_config() {
local conf="$1"; shift
"$@" "${_verboseHelpArgs[@]}" 2>/dev/null \
| awk -v conf="$conf" '$1 == conf && /^[^ \t]/ { sub(/^[^ \t]+[ \t]+/, ""); print; exit }'
# match "datadir /some/path with/spaces in/it here" but not "--xyz=abc\n datadir (xyz)"
}
# Do a temporary startup of the MySQL server, for init purposes
docker_temp_server_start() {
if [ "${MYSQL_MAJOR}" = '5.6' ] || [ "${MYSQL_MAJOR}" = '5.7' ]; then
"$@" --skip-networking --default-time-zone=SYSTEM --socket="${SOCKET}" &
mysql_note "Waiting for server startup"
local i
for i in {30..0}; do
# only use the root password if the database has already been initialized
# so that it won't try to fill in a password file when it hasn't been set yet
extraArgs=()
if [ -z "$DATABASE_ALREADY_EXISTS" ]; then
extraArgs+=( '--dont-use-mysql-root-password' )
fi
if docker_process_sql "${extraArgs[@]}" --database=mysql <<<'SELECT 1' &> /dev/null; then
break
fi
sleep 1
done
if [ "$i" = 0 ]; then
mysql_error "Unable to start server."
fi
else
# For 5.7+ the server is ready for use as soon as startup command unblocks
if ! "$@" --daemonize --skip-networking --default-time-zone=SYSTEM --socket="${SOCKET}"; then
mysql_error "Unable to start server."
fi
fi
}
# Stop the server. When using a local socket file mysqladmin will block until
# the shutdown is complete.
docker_temp_server_stop() {
if ! mysqladmin --defaults-extra-file=<( _mysql_passfile ) shutdown -uroot --socket="${SOCKET}"; then
mysql_error "Unable to shut down server."
fi
}
# Verify that the minimally required password settings are set for new databases.
docker_verify_minimum_env() {
if [ -z "$MYSQL_ROOT_PASSWORD" -a -z "$MYSQL_ALLOW_EMPTY_PASSWORD" -a -z "$MYSQL_RANDOM_ROOT_PASSWORD" ]; then
mysql_error <<-'EOF'
Database is uninitialized and password option is not specified
You need to specify one of the following:
- MYSQL_ROOT_PASSWORD
- MYSQL_ALLOW_EMPTY_PASSWORD
- MYSQL_RANDOM_ROOT_PASSWORD
EOF
fi
# This will prevent the CREATE USER from failing (and thus exiting with a half-initialized database)
if [ "$MYSQL_USER" = 'root' ]; then
mysql_error <<-'EOF'
MYSQL_USER="root", MYSQL_USER and MYSQL_PASSWORD are for configuring a regular user and cannot be used for the root user
Remove MYSQL_USER="root" and use one of the following to control the root user password:
- MYSQL_ROOT_PASSWORD
- MYSQL_ALLOW_EMPTY_PASSWORD
- MYSQL_RANDOM_ROOT_PASSWORD
EOF
fi
# warn when missing one of MYSQL_USER or MYSQL_PASSWORD
if [ -n "$MYSQL_USER" ] && [ -z "$MYSQL_PASSWORD" ]; then
mysql_warn 'MYSQL_USER specified, but missing MYSQL_PASSWORD; MYSQL_USER will not be created'
elif [ -z "$MYSQL_USER" ] && [ -n "$MYSQL_PASSWORD" ]; then
mysql_warn 'MYSQL_PASSWORD specified, but missing MYSQL_USER; MYSQL_PASSWORD will be ignored'
fi
}
# creates folders for the database
# also ensures permission for user mysql of run as root
docker_create_db_directories() {
local user; user="$(id -u)"
# TODO other directories that are used by default? like /var/lib/mysql-files
# see https://github.com/docker-library/mysql/issues/562
mkdir -p "$DATADIR"
if [ "$user" = "0" ]; then
# this will cause less disk access than `chown -R`
find "$DATADIR" \! -user mysql -exec chown mysql '{}' +
fi
}
# initializes the database directory
docker_init_database_dir() {
mysql_note "Initializing database files"
if [ "$MYSQL_MAJOR" = '5.6' ]; then
mysql_install_db --datadir="$DATADIR" --rpm --keep-my-cnf "${@:2}" --default-time-zone=SYSTEM
else
"$@" --initialize-insecure --default-time-zone=SYSTEM
fi
mysql_note "Database files initialized"
if command -v mysql_ssl_rsa_setup > /dev/null && [ ! -e "$DATADIR/server-key.pem" ]; then
# https://github.com/mysql/mysql-server/blob/23032807537d8dd8ee4ec1c4d40f0633cd4e12f9/packaging/deb-in/extra/mysql-systemd-start#L81-L84
mysql_note "Initializing certificates"
mysql_ssl_rsa_setup --datadir="$DATADIR"
mysql_note "Certificates initialized"
fi
}
# Loads various settings that are used elsewhere in the script
# This should be called after mysql_check_config, but before any other functions
docker_setup_env() {
# Get config
declare -g DATADIR SOCKET
DATADIR="$(mysql_get_config 'datadir' "$@")"
SOCKET="$(mysql_get_config 'socket' "$@")"
# Initialize values that might be stored in a file
file_env 'MYSQL_ROOT_HOST' '%'
file_env 'MYSQL_DATABASE'
file_env 'MYSQL_USER'
file_env 'MYSQL_PASSWORD'
file_env 'MYSQL_ROOT_PASSWORD'
declare -g DATABASE_ALREADY_EXISTS
if [ -d "$DATADIR/mysql" ]; then
DATABASE_ALREADY_EXISTS='true'
fi
}
# Execute sql script, passed via stdin
# usage: docker_process_sql [--dont-use-mysql-root-password] [mysql-cli-args]
# ie: docker_process_sql --database=mydb <<<'INSERT ...'
# ie: docker_process_sql --dont-use-mysql-root-password --database=mydb <my-file.sql
docker_process_sql() {
passfileArgs=()
if [ '--dont-use-mysql-root-password' = "$1" ]; then
passfileArgs+=( "$1" )
shift
fi
# args sent in can override this db, since they will be later in the command
if [ -n "$MYSQL_DATABASE" ]; then
set -- --database="$MYSQL_DATABASE" "$@"
fi
mysql --defaults-extra-file=<( _mysql_passfile "${passfileArgs[@]}") --protocol=socket -uroot -hlocalhost --socket="${SOCKET}" --comments "$@"
}
# Initializes database with timezone info and root password, plus optional extra db/user
docker_setup_db() {
# Load timezone info into database
if [ -z "$MYSQL_INITDB_SKIP_TZINFO" ]; then
# sed is for https://bugs.mysql.com/bug.php?id=20545
mysql_tzinfo_to_sql /usr/share/zoneinfo \
| sed 's/Local time zone must be set--see zic manual page/FCTY/' \
| docker_process_sql --dont-use-mysql-root-password --database=mysql
# tell docker_process_sql to not use MYSQL_ROOT_PASSWORD since it is not set yet
fi
# Generate random root password
if [ -n "$MYSQL_RANDOM_ROOT_PASSWORD" ]; then
export MYSQL_ROOT_PASSWORD="$(pwgen -1 32)"
mysql_note "GENERATED ROOT PASSWORD: $MYSQL_ROOT_PASSWORD"
fi
# Sets root password and creates root users for non-localhost hosts
local rootCreate=
# default root to listen for connections from anywhere
if [ -n "$MYSQL_ROOT_HOST" ] && [ "$MYSQL_ROOT_HOST" != 'localhost' ]; then
# no, we don't care if read finds a terminating character in this heredoc
# https://unix.stackexchange.com/questions/265149/why-is-set-o-errexit-breaking-this-read-heredoc-expression/265151#265151
read -r -d '' rootCreate <<-EOSQL || true
CREATE USER 'root'@'${MYSQL_ROOT_HOST}' IDENTIFIED BY '${MYSQL_ROOT_PASSWORD}' ;
GRANT ALL ON *.* TO 'root'@'${MYSQL_ROOT_HOST}' WITH GRANT OPTION ;
EOSQL
fi
local passwordSet=
if [ "$MYSQL_MAJOR" = '5.6' ]; then
# no, we don't care if read finds a terminating character in this heredoc (see above)
read -r -d '' passwordSet <<-EOSQL || true
DELETE FROM mysql.user WHERE user NOT IN ('mysql.sys', 'mysqlxsys', 'root') OR host NOT IN ('localhost') ;
SET PASSWORD FOR 'root'@'localhost'=PASSWORD('${MYSQL_ROOT_PASSWORD}') ;
-- 5.5: https://github.com/mysql/mysql-server/blob/e48d775c6f066add457fa8cfb2ebc4d5ff0c7613/scripts/mysql_secure_installation.sh#L192-L210
-- 5.6: https://github.com/mysql/mysql-server/blob/06bc670db0c0e45b3ea11409382a5c315961f682/scripts/mysql_secure_installation.sh#L218-L236
-- 5.7: https://github.com/mysql/mysql-server/blob/913071c0b16cc03e703308250d795bc381627e37/client/mysql_secure_installation.cc#L792-L818
-- 8.0: https://github.com/mysql/mysql-server/blob/b93c1661d689c8b7decc7563ba15f6ed140a4eb6/client/mysql_secure_installation.cc#L726-L749
DELETE FROM mysql.db WHERE Db='test' OR Db='test\_%' ;
-- https://github.com/docker-library/mysql/pull/479#issuecomment-414561272 ("This is only needed for 5.5 and 5.6")
EOSQL
else
# no, we don't care if read finds a terminating character in this heredoc (see above)
read -r -d '' passwordSet <<-EOSQL || true
ALTER USER 'root'@'localhost' IDENTIFIED BY '${MYSQL_ROOT_PASSWORD}' ;
EOSQL
fi
# tell docker_process_sql to not use MYSQL_ROOT_PASSWORD since it is just now being set
docker_process_sql --dont-use-mysql-root-password --database=mysql <<-EOSQL
-- What's done in this file shouldn't be replicated
-- or products like mysql-fabric won't work
SET @@SESSION.SQL_LOG_BIN=0;
${passwordSet}
GRANT ALL ON *.* TO 'root'@'localhost' WITH GRANT OPTION ;
FLUSH PRIVILEGES ;
${rootCreate}
DROP DATABASE IF EXISTS test ;
EOSQL
# Creates a custom database and user if specified
if [ -n "$MYSQL_DATABASE" ]; then
mysql_note "Creating database ${MYSQL_DATABASE}"
docker_process_sql --database=mysql <<<"CREATE DATABASE IF NOT EXISTS \`$MYSQL_DATABASE\` ;"
fi
if [ -n "$MYSQL_USER" ] && [ -n "$MYSQL_PASSWORD" ]; then
mysql_note "Creating user ${MYSQL_USER}"
docker_process_sql --database=mysql <<<"CREATE USER '$MYSQL_USER'@'%' IDENTIFIED BY '$MYSQL_PASSWORD' ;"
if [ -n "$MYSQL_DATABASE" ]; then
mysql_note "Giving user ${MYSQL_USER} access to schema ${MYSQL_DATABASE}"
docker_process_sql --database=mysql <<<"GRANT ALL ON \`${MYSQL_DATABASE//_/\\_}\`.* TO '$MYSQL_USER'@'%' ;"
fi
fi
}
_mysql_passfile() {
# echo the password to the "file" the client uses
# the client command will use process substitution to create a file on the fly
# ie: --defaults-extra-file=<( _mysql_passfile )
if [ '--dont-use-mysql-root-password' != "$1" ] && [ -n "$MYSQL_ROOT_PASSWORD" ]; then
cat <<-EOF
[client]
password="${MYSQL_ROOT_PASSWORD}"
EOF
fi
}
# Mark root user as expired so the password must be changed before anything
# else can be done (only supported for 5.6+)
mysql_expire_root_user() {
if [ -n "$MYSQL_ONETIME_PASSWORD" ]; then
docker_process_sql --database=mysql <<-EOSQL
ALTER USER 'root'@'%' PASSWORD EXPIRE;
EOSQL
fi
}
# check arguments for an option that would cause mysqld to stop
# return true if there is one
_mysql_want_help() {
local arg
for arg; do
case "$arg" in
-'?'|--help|--print-defaults|-V|--version)
return 0
;;
esac
done
return 1
}
_main() {
# if command starts with an option, prepend mysqld
if [ "${1:0:1}" = '-' ]; then
set -- mysqld "$@"
fi
# skip setup if they aren't running mysqld or want an option that stops mysqld
if [ "$1" = 'mysqld' ] && ! _mysql_want_help "$@"; then
mysql_note "Entrypoint script for MySQL Server ${MYSQL_VERSION} started."
mysql_check_config "$@"
# Load various environment variables
docker_setup_env "$@"
docker_create_db_directories
# If container is started as root user, restart as dedicated mysql user
if [ "$(id -u)" = "0" ]; then
mysql_note "Switching to dedicated user 'mysql'"
exec gosu mysql "$BASH_SOURCE" "$@"
fi
# there's no database, so it needs to be initialized
if [ -z "$DATABASE_ALREADY_EXISTS" ]; then
docker_verify_minimum_env
# check dir permissions to reduce likelihood of half-initialized database
ls /docker-entrypoint-initdb.d/ > /dev/null
docker_init_database_dir "$@"
mysql_note "Starting temporary server"
docker_temp_server_start "$@"
mysql_note "Temporary server started."
docker_setup_db
docker_process_init_files /docker-entrypoint-initdb.d/*
mysql_expire_root_user
mysql_note "Stopping temporary server"
docker_temp_server_stop
mysql_note "Temporary server stopped"
echo
mysql_note "MySQL init process done. Ready for start up."
echo
fi
fi
exec "$@"
}
# If we are sourced from elsewhere, don't perform any further actions
if ! _is_sourced; then
_main "$@"
fi
1.3 init.sh
#!/bin/bash
mysql -uroot -p$MYSQL_ROOT_PASSWORD <<EOF
CREATE USER '$MYSQL_REPLICATION_USER'@'%' IDENTIFIED WITH 'mysql_native_password' BY '$MYSQL_REPLICATION_PASSWORD';
GRANT REPLICATION SLAVE ON *.* TO '$MYSQL_REPLICATION_USER'@'%';
FLUSH PRIVILEGES ;
EOF
1.4 config
1.4.1 my.cnf
# Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
# The MySQL Server configuration file.
#
# For explanations see
# http://dev.mysql.com/doc/mysql/en/server-system-variables.html
[mysqld]
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
datadir = /var/lib/mysql
secure-file-priv= NULL
# Custom config should go here
!includedir /etc/mysql/conf.d/
1.4.2 conf.d/docker.cnf
[mysqld]
server-id=1
log-bin
skip-host-cache
skip-name-resolve
1.5 构建镜像
这里使用了阿里云个人版 容器镜像服务
docker build -t registry.cn-shanghai.aliyuncs.com/ligan0404/mysql-master:v1.1.7 .
docker push registry.cn-shanghai.aliyuncs.com/ligan0404/mysql-master:v1.1.7
2. 构建slave镜像
2.1 Dockerfile
和master一样的，在ENTRYPOINT上面加上下面的命令即可：
RUN RAND="$(date +%s | rev | cut -c 1-2)$(echo ${RANDOM})" && sed -i '/\[mysqld\]/a server-id='$RAND'\nlog-bin' /etc/mysql/conf.d/docker.cnf
2.2 docker-entrypoint.sh
和master一样的，没任何变化。
2.3 init.sh
构建主从语句
#!/bin/bash
mysql -uroot -p$MYSQL_ROOT_PASSWORD <<EOF
CREATE USER '$MYSQL_REPLICATION_USER'@'%' IDENTIFIED WITH 'mysql_native_password' BY '$MYSQL_REPLICATION_PASSWORD';
GRANT REPLICATION SLAVE ON *.* TO '$MYSQL_REPLICATION_USER'@'%';
FLUSH PRIVILEGES ;
EOF
2.4 config
2.4.1 my.cnf
和master一致，无变化。
2.4.2 conf.d/docker.cnf
没有server-id了，通过dockerfile去随机生成了。
[mysqld]
skip-host-cache
skip-name-resolve
2.5 构建镜像
docker build -t registry.cn-shanghai.aliyuncs.com/ligan0404/mysql-slave:v1.1.0 .
docker push registry.cn-shanghai.aliyuncs.com/ligan0404/mysql-slave:v1.1.0
3. 创建pv,pvc(nfs)
storageClassName: nfs-data 的创建，直接参考 NFS存储 动态创建 PVC PV文档。
4. 创建master StatefulSet,svc
apiVersion: apps/v1
kind: StatefulSet
metadata:
annotations: {}
labels:
app: mysql-master
name: mysql-master
spec:
replicas: 1
selector:
matchLabels:
app: mysql-master
template:
metadata:
labels:
app: mysql-master
spec:
imagePullSecrets:
- name: ali-secret
containers:
- env:
- name: MYSQL_ROOT_PASSWORD
value: '123456'
- name: MYSQL_REPLICATION_USER
value: repl
- name: MYSQL_REPLICATION_PASSWORD
value: '123456'
image: 'registry.cn-shanghai.aliyuncs.com/ligan0404/mysql-master:v1.0.0'
imagePullPolicy: Always
name: mysql-master
ports:
- containerPort: 3306
name: mysql-master
protocol: TCP
volumeMounts:
- mountPath: /var/lib/mysql
name: pv-nfs-mysql-master
volumeClaimTemplates:
- metadata:
name: pv-nfs-mysql-master
spec:
accessModes: [ "ReadWriteMany","ReadWriteOnce"]
resources:
requests:
storage: 1G
storageClassName: nfs-data
---
apiVersion: v1
kind: Service
metadata:
annotations: {}
labels:
app: mysql-master
name: mysql-master
spec:
ports:
- name: mysql-master
nodePort: 30066
port: 3306
protocol: TCP
targetPort: 3306
selector:
app: mysql-master
type: NodePort
5. 创建slave StatefulSet,svc
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
annotations: {}
labels:
app: mysql-slave
name: mysql-slave
spec:
replicas: 2
selector:
matchLabels:
app: mysql-slave
template:
metadata:
labels:
app: mysql-slave
spec:
containers:
- env:
- name: MYSQL_ROOT_PASSWORD
value: '123456'
- name: MYSQL_REPLICATION_USER
value: repl
- name: MYSQL_REPLICATION_PASSWORD
value: '123456'
image: 'registry.cn-shanghai.aliyuncs.com/ligan0404/mysql-slave:v1.1.0'
imagePullPolicy: Always
name: mysql-slave
ports:
- containerPort: 3306
name: mysql-slave
protocol: TCP
volumeMounts:
- mountPath: /var/lib/mysql
name: pv-nfs-mysql-slave
imagePullSecrets:
- name: ali-secret
volumeClaimTemplates:
- metadata:
name: pv-nfs-mysql-slave
spec:
accessModes: [ "ReadWriteMany","ReadWriteOnce"]
resources:
requests:
storage: 1G
storageClassName: nfs-data
---
apiVersion: v1
kind: Service
metadata:
annotations: {}
labels:
app: mysql-slave
name: mysql-slave
spec:
ports:
- name: mysql-slave
port: 3306
protocol: TCP
targetPort: 3306
selector:
app: mysql-slave
type: NodePort
6. 测试
master中执行：
mysql -uroot -p
show master status;
create database test; use test; create table test_tb(id int(3),name char(10)); insert into test_tb values(001,'ok');
slave执行：
mysql -uroot -p
show slave status\G;
show databases;
use test;
show tables;
select* from test_tb;
7. 参考资料
K8S 使用NFS存储 动态创建 PVC/PV 并通过 Statefulset 部署 MySQL
kubernetes部署mysql
基于K8s部署MySQL cluster
在kubernetes集群中部署mysql主从
利用Kubernetes搭建mysql主从复制集群
k8s使用nfs持久存储mysql数据的一次踩坑
k8s搭建mysql主从同步
使用Docker快速部署MySQL并初始数据
Dockerfile 部署MySql 8并初始化数据脚本
