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This commit is contained in:
Udo Waechter
2024-04-21 17:02:48 +02:00
parent 7da16def78
commit 4b2f5d8c9f
67 changed files with 7 additions and 176 deletions
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2
_apps/mariadb/README.md Normal file
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Access Mysql POD:
kubectl exec -it <PODNAME> bash

101
_apps/mariadb/mariadb-deployment.yaml Normal file
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apiVersion: v1
kind: Service
metadata:
name: mariadb
spec:
ports:
- name: mysql
port: 3306
- name: metrics
port: 9104
selector:
app: mariadb
type: LoadBalancer
loadBalancerIP: 172.23.255.5
---
apiVersion: apps/v1 # for versions before 1.9.0 use apps/v1beta2
kind: Deployment
metadata:
name: mariadb
spec:
selector:
matchLabels:
app: mariadb
strategy:
type: Recreate
template:
metadata:
labels:
app: mariadb
spec:
containers:
- image: cr.lan/mariadb
name: mariadb
imagePullPolicy: Always
env:
# Use secret in real usage
- name: MYSQL_ROOT_PASSWORD
value: 54MzzfHHTA9qJX64Pvdn
ports:
- containerPort: 3306
name: mariadb
volumeMounts:
- name: mariadb-persistent-storage
mountPath: /var/lib/mysql
resources:
requests:
memory: "256Mi"
cpu: "250m"
limits:
memory: "1500Mi"
cpu: "2000m"
- image: cr.lan/mariadb-prometheus-exporter
name: mariadb-prometheus-exporter
imagePullPolicy: Always
ports:
- containerPort: 9104
name: metrics
resources:
requests:
memory: "24Mi"
cpu: "50m"
limits:
memory: "128Mi"
cpu: "100m"
volumes:
- name: mariadb-persistent-storage
persistentVolumeClaim:
claimName: mariadb-data
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: mariadb-data
spec:
storageClassName: nfs-ssd
volumeName: mariadb-data
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 40Gi
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: mariadb-data
spec:
storageClassName: "nfs-ssd"
nfs:
path: /data/raid1-ssd/k8s-data/mariadb-data
server: ebin01
capacity:
storage: 40Gi
accessModes:
- ReadWriteOnce
volumeMode: Filesystem
persistentVolumeReclaimPolicy: Retain
claimRef:
kind: PersistentVolumeClaim
name: mariadb-data
namspace: live-env

15
_apps/mariadb/mariadb-prometheus/Dockerfile Normal file
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# vim:set ft=dockerfile:
FROM cr.lan/debian-stable
RUN set -ex; \
apt-get update; \
apt-get install -y --no-install-recommends \
prometheus-mysqld-exporter; \
apt-get clean -y; \
rm -rf /var/lib/apt/lists/*;
RUN set -ex; \
echo '[client]\nhost=localhost\nuser=prometheus\npassword=prom01\n' >/etc/prometheus-mysql-exporter
EXPOSE 9104
CMD ["prometheus-mysqld-exporter", "--config.my-cnf", "/etc/prometheus-mysql-exporter"]

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_apps/mariadb/mariadb/Dockerfile Normal file
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# vim:set ft=dockerfile:
FROM cr.lan/debian-stable
# 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
# https://bugs.debian.org/830696 (apt uses gpgv by default in newer releases, rather than gpg)
RUN set -ex; \
sed -i 's@deb.debian.org@apt-cache.lan/deb.debian.org@g' /etc/apt/sources.list; \
sed -i 's@security.debian.org@apt-cache.lan/security.debian.org@g' /etc/apt/sources.list; \
apt-get update; \
if ! which gpg; then \
apt-get install -y --no-install-recommends gnupg; \
fi; \
if ! gpg --version | grep -q '^gpg (GnuPG) 1\.'; then \
# Ubuntu includes "gnupg" (not "gnupg2", but still 2.x), but not dirmngr, and gnupg 2.x requires dirmngr
# so, if we're not running gnupg 1.x, explicitly install dirmngr too
apt-get install -y --no-install-recommends dirmngr; \
fi; \
rm -rf /var/lib/apt/lists/*;
# add gosu for easy step-down from root
# https://github.com/tianon/gosu/releases
ENV GOSU_VERSION 1.12
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 $savedAptMark > /dev/null; \
apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
chmod +x /usr/local/bin/gosu; \
gosu --version; \
gosu nobody true
RUN mkdir /docker-entrypoint-initdb.d
# install "pwgen" for randomizing passwords
# install "tzdata" for /usr/share/zoneinfo/
# install "xz-utils" for .sql.xz docker-entrypoint-initdb.d files
RUN set -ex; \
apt-get update; \
apt-get install -y --no-install-recommends \
pwgen \
tzdata \
xz-utils \
; \
rm -rf /var/lib/apt/lists/*
# bashbrew-architectures: amd64 arm64v8 ppc64le
#ENV MARIADB_MAJOR 10.3
#ENV MARIADB_VERSION 1:10.3.22-0+deb10u1
# release-status:RC
# (https://downloads.mariadb.org/mariadb/+releases/)
# add repository pinning to make sure dependencies from this MariaDB repo are preferred over Debian dependencies
# libmariadbclient18 : Depends: libmysqlclient18 (= 5.5.42+maria-1~wheezy) but 5.5.43-0+deb7u1 is to be installed
# the "/var/lib/mysql" stuff here is because the mysql-server postinst doesn't have an explicit way to disable the mysql_install_db codepath besides having a database already "configured" (ie, stuff in /var/lib/mysql/mysql)
# also, we set debconf keys to make APT a little quieter
RUN set -ex; \
{ \
echo "mariadb-server-$MARIADB_MAJOR" mysql-server/root_password password 'unused'; \
echo "mariadb-server-$MARIADB_MAJOR" mysql-server/root_password_again password 'unused'; \
} | debconf-set-selections; \
apt-get update; \
apt-get install -y \
"mariadb-server" \
# mariadb-backup is installed at the same time so that `mysql-common` is only installed once from just mariadb repos
mariadb-backup \
socat \
; \
rm -rf /var/lib/apt/lists/*; \
# comment out any "user" entires in the MySQL config ("docker-entrypoint.sh" or "--user" will handle user switching)
sed -ri 's/^user\s/#&/' /etc/mysql/my.cnf /etc/mysql/conf.d/*; \
echo '[mysqld]\ninnodb_use_native_aio = 0\ninnodb_file_per_table = 1\n' >>/etc/mysql/conf.d/innodb_aio.cnf; \
# purge and re-create /var/lib/mysql with appropriate ownership
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 777 /var/run/mysqld; \
# comment out a few problematic configuration values
find /etc/mysql/ -name '*.cnf' -print0 \
| xargs -0 grep -lZE '^(bind-address|log)' \
| xargs -rt -0 sed -Ei 's/^(bind-address|log)/#&/'; \
# don't reverse lookup hostnames, they are usually another container
echo '[mysqld]\nskip-host-cache\nskip-name-resolve' > /etc/mysql/conf.d/docker.cnf; \
mkdir -p /run/mysqld; \
apt-get clean -y;
VOLUME /var/lib/mysql
COPY docker-entrypoint.sh /usr/local/bin/
ENTRYPOINT ["docker-entrypoint.sh"]
EXPOSE 3306
CMD ["mysqld"]

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_apps/mariadb/mariadb/docker-entrypoint.sh Executable file
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#!/bin/bash
set -eo pipefail
shopt -s nullglob
# logging functions
mysql_log() {
local type="$1"; shift
printf '%s [%s] [Entrypoint]: %s\n' "$(date --rfc-3339=seconds)" "$type" "$*"
}
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 $f" ;;
esac
echo
done
}
mysql_check_config() {
local toRun=( "$@" --verbose --help --log-bin-index="$(mktemp -u)" ) errors
if ! errors="$("${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="$1"; shift
"$@" --verbose --help --log-bin-index="$(mktemp -u)" 2>/dev/null \
| awk -v conf="$conf" '$1 == conf && /^[^ \t]/ { sub(/^[^ \t]+[ \t]+/, ""); print; exit }'
# match "datadir /some/path with/spaces in/it here" but not "--xyz=abc\n datadir (xyz)"
}
# Do a temporary startup of the MySQL server, for init purposes
docker_temp_server_start() {
"$@" --skip-networking --socket="${SOCKET}" &
mysql_note "Waiting for server startup"
local i
for i in {30..0}; do
# only use the root password if the database has already been initializaed
# so that it won't try to fill in a password file when it hasn't been set yet
extraArgs=()
if [ -z "$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
}
# 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 $'Database is uninitialized and password option is not specified\n\tYou need to specify one of MYSQL_ROOT_PASSWORD, MYSQL_ALLOW_EMPTY_PASSWORD and MYSQL_RANDOM_ROOT_PASSWORD'
fi
}
# creates folders for the database
# also ensures permission for user mysql of run as root
docker_create_db_directories() {
local user; user="$(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 "$DATADIR" \! -user mysql -exec chown mysql '{}' +
fi
}
# initializes the database directory
docker_init_database_dir() {
mysql_note "Initializing database files"
installArgs=( --datadir="$DATADIR" --rpm )
if { mysql_install_db --help || :; } | grep -q -- '--auth-root-authentication-method'; then
# beginning in 10.4.3, install_db uses "socket" which only allows system user root to connect, switch back to "normal" to allow mysql root without a password
# see https://github.com/MariaDB/server/commit/b9f3f06857ac6f9105dc65caae19782f09b47fb3
# (this flag doesn't exist in 10.0 and below)
installArgs+=( --auth-root-authentication-method=normal )
fi
# "Other options are passed to mysqld." (so we pass all "mysqld" arguments directly here)
mysql_install_db "${installArgs[@]}" "${@:2}"
mysql_note "Database files initialized"
}
# 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}" "$@"
}
# Initializes database with timezone info and root password, plus optional extra db/user
docker_setup_db() {
# Load timezone info into database
if [ -z "$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
# 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;
DELETE FROM mysql.user WHERE user NOT IN ('mysql.sys', 'mariadb.sys', 'mysqlxsys', 'root') OR host NOT IN ('localhost') ;
SET PASSWORD FOR 'root'@'localhost'=PASSWORD('${MYSQL_ROOT_PASSWORD}') ;
-- 10.1: https://github.com/MariaDB/server/blob/d925aec1c10cebf6c34825a7de50afe4e630aff4/scripts/mysql_secure_installation.sh#L347-L365
-- 10.5: https://github.com/MariaDB/server/blob/00c3a28820c67c37ebbca72691f4897b57f2eed5/scripts/mysql_secure_installation.sh#L351-L369
DELETE FROM mysql.db WHERE Db='test' OR Db='test\_%' ;
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
docker_process_sql --database=mysql <<<"FLUSH PRIVILEGES ;"
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="${MYSQL_ROOT_PASSWORD}"
EOF
fi
}
# check arguments for an option that would cause mysqld to stop
# return true if there is one
_mysql_want_help() {
local arg
for arg; do
case "$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 ${MARIADB_VERSION} started."
mysql_check_config "$@"
# 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 "$@"
mysql_note "Temporary server started."
docker_setup_db
docker_process_init_files /docker-entrypoint-initdb.d/*
mysql_note "Stopping temporary server"
docker_temp_server_stop
mysql_note "Temporary server stopped"
echo
mysql_note "MySQL init process done. Ready for start up."
echo
fi
fi
exec "$@"
}
# If we are sourced from elsewhere, don't perform any further actions
if ! _is_sourced; then
_main "$@"
fi

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_apps/mariadb/tekton-image-build-mariadb-prometheus-exporter.yaml Normal file
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apiVersion: tekton.dev/v1beta1
kind: PipelineRun
metadata:
name: img-mariadb-prometheus-node-exporter
spec:
pipelineRef:
name: kaniko-pipeline
params:
- name: git-url
value: http://git-ui.lan/chaos/kubernetes.git
- name: git-revision
value: master
- name: path-to-image-context
value: apps/mariadb/mariadb-prometheus
- name: path-to-dockerfile
value: apps/mariadb/mariadb-prometheus/Dockerfile
- name: image-name
value: cr.lan/mariadb-prometheus-node-exporter
workspaces:
- name: git-source
persistentVolumeClaim:
claimName: tektoncd-workspaces
subPath: tekton/mariadb-prometheus-node-exporter

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_apps/mariadb/tekton-image-build-mariadb.yaml Normal file
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apiVersion: tekton.dev/v1beta1
kind: PipelineRun
metadata:
name: img-mariadb
spec:
pipelineRef:
name: kaniko-pipeline
params:
- name: git-url
value: http://git-ui.lan/chaos/kubernetes.git
- name: git-revision
value: master
- name: path-to-image-context
value: apps/mariadb/mariadb
- name: path-to-dockerfile
value: apps/mariadb/mariadb/Dockerfile
- name: image-name
value: cr.lan/mariadb
workspaces:
- name: git-source
persistentVolumeClaim:
claimName: tektoncd-workspaces
subPath: tekton/mariadb