From 48d74578e0806c79e6f90f418abd9fc92482f0a9 Mon Sep 17 00:00:00 2001 From: diandian Date: Sun, 7 Apr 2024 00:14:13 +0800 Subject: [PATCH] =?UTF-8?q?=E4=B8=8A=E4=BC=A0=E6=96=87=E4=BB=B6=E8=87=B3?= =?UTF-8?q?=20'mysql-yaml'?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- mysql-yaml/mysql-configmap.yaml | 15 +++ mysql-yaml/mysql-services.yaml | 29 +++++ mysql-yaml/mysql-statefulset.yaml | 181 ++++++++++++++++++++++++++++++ 3 files changed, 225 insertions(+) create mode 100644 mysql-yaml/mysql-configmap.yaml create mode 100644 mysql-yaml/mysql-services.yaml create mode 100644 mysql-yaml/mysql-statefulset.yaml diff --git a/mysql-yaml/mysql-configmap.yaml b/mysql-yaml/mysql-configmap.yaml new file mode 100644 index 0000000..8e0d11e --- /dev/null +++ b/mysql-yaml/mysql-configmap.yaml @@ -0,0 +1,15 @@ +apiVersion: v1 +kind: ConfigMap +metadata: + name: mysql + labels: + app: mysql +data: + master.cnf: | + # Apply this config only on the master. + [mysqld] + log-bin + slave.cnf: | + # Apply this config only on slaves. + [mysqld] + super-read-only diff --git a/mysql-yaml/mysql-services.yaml b/mysql-yaml/mysql-services.yaml new file mode 100644 index 0000000..29838d7 --- /dev/null +++ b/mysql-yaml/mysql-services.yaml @@ -0,0 +1,29 @@ +# Headless service for stable DNS entries of StatefulSet members. +apiVersion: v1 +kind: Service +metadata: + name: mysql + labels: + app: mysql +spec: + ports: + - name: mysql + port: 3306 + clusterIP: None + selector: + app: mysql +--- +# Client service for connecting to any MySQL instance for reads. +# For writes, you must instead connect to the master: mysql-0.mysql. +apiVersion: v1 +kind: Service +metadata: + name: mysql-read + labels: + app: mysql +spec: + ports: + - name: mysql + port: 3306 + selector: + app: mysql diff --git a/mysql-yaml/mysql-statefulset.yaml b/mysql-yaml/mysql-statefulset.yaml new file mode 100644 index 0000000..12d02cd --- /dev/null +++ b/mysql-yaml/mysql-statefulset.yaml @@ -0,0 +1,181 @@ +apiVersion: apps/v1 +kind: StatefulSet +metadata: + name: mysql +spec: + selector: + matchLabels: + app: mysql + serviceName: mysql + replicas: 1 + template: + metadata: + labels: + app: mysql + spec: + # 设置初始化容器，进行一些准备工作 + initContainers: + - name: init-mysql + image: mysql:5.7 + # 为每个MySQL节点配置service-id + # 如果节点序号是0，则使用master的配置， 其余节点使用slave的配置 + command: + - bash + - "-c" + - | + set -ex + # Generate mysql server-id from pod ordinal index. + [[ `hostname` =~ -([0-9]+)$ ]] || exit 1 + ordinal=${BASH_REMATCH[1]} + echo [mysqld] > /mnt/conf.d/server-id.cnf + # Add an offset to avoid reserved server-id=0 value. + echo server-id=$((100 + $ordinal)) >> /mnt/conf.d/server-id.cnf + # Copy appropriate conf.d files from config-map to emptyDir. + if [[ $ordinal -eq 0 ]]; then + cp /mnt/config-map/master.cnf /mnt/conf.d/ + else + cp /mnt/config-map/slave.cnf /mnt/conf.d/ + fi + volumeMounts: + - name: conf + mountPath: /mnt/conf.d + - name: config-map + mountPath: /mnt/config-map + - name: clone-mysql + #image: gcr.io/google-samples/xtrabackup:1.0 + image: ipunktbs/xtrabackup:1.0.0 + # 为除了节点序号为0的主节点外的其它节点，备份前一个节点的数据 + command: + - bash + - "-c" + - | + set -ex + # Skip the clone if data already exists. + [[ -d /var/lib/mysql/mysql ]] && exit 0 + # Skip the clone on master (ordinal index 0). + [[ `hostname` =~ -([0-9]+)$ ]] || exit 1 + ordinal=${BASH_REMATCH[1]} + [[ $ordinal -eq 0 ]] && exit 0 + # Clone data from previous peer. + ncat --recv-only mysql-$(($ordinal-1)).mysql 3307 | xbstream -x -C /var/lib/mysql + # Prepare the backup. + xtrabackup --prepare --target-dir=/var/lib/mysql + volumeMounts: + - name: data + mountPath: /var/lib/mysql + subPath: mysql + - name: conf + mountPath: /etc/mysql/conf.d + containers: + - name: mysql + image: mysql:5.7 + # 设置支持免密登录 + env: + - name: MYSQL_ALLOW_EMPTY_PASSWORD + value: "1" + ports: + - name: mysql + containerPort: 3306 + volumeMounts: + - name: data + mountPath: /var/lib/mysql + subPath: mysql + - name: conf + mountPath: /etc/mysql/conf.d + resources: + # 设置启动pod需要的资源，官方文档上需要500m cpu，1Gi memory。 + # 我本地测试的时候，会因为资源不足，报1 Insufficient cpu, 1 Insufficient memory错误，所以我改小了点 + requests: + # m是千分之一的意思，100m表示需要0.1个cpu + cpu: 100m + # Mi是兆的意思，需要100M 内存 + memory: 100Mi + livenessProbe: + # 使用mysqladmin ping命令，对MySQL节点进行探活检测 + # 在节点部署完30秒后开始，每10秒检测一次，超时时间为5秒 + exec: + command: ["mysqladmin", "ping"] + initialDelaySeconds: 30 + periodSeconds: 10 + timeoutSeconds: 5 + readinessProbe: + # 对节点服务可用性进行检测， 启动5秒后开始，每2秒检测一次，超时时间1秒 + exec: + # Check we can execute queries over TCP (skip-networking is off). + command: ["mysql", "-h", "127.0.0.1", "-e", "SELECT 1"] + initialDelaySeconds: 5 + periodSeconds: 2 + timeoutSeconds: 1 + - name: xtrabackup + #image: gcr.io/google-samples/xtrabackup:1.0 + image: ipunktbs/xtrabackup:1.0.0 + ports: + - name: xtrabackup + containerPort: 3307 + # 开始进行备份文件校验、解析和开始同步 + command: + - bash + - "-c" + - | + set -ex + cd /var/lib/mysql + # Determine binlog position of cloned data, if any. + if [[ -f xtrabackup_slave_info && "x$( change_master_to.sql.in + # Ignore xtrabackup_binlog_info in this case (it's useless). + rm -f xtrabackup_slave_info xtrabackup_binlog_info + elif [[ -f xtrabackup_binlog_info ]]; then + # We're cloning directly from master. Parse binlog position. + [[ `cat xtrabackup_binlog_info` =~ ^(.*?)[[:space:]]+(.*?)$ ]] || exit 1 + rm -f xtrabackup_binlog_info xtrabackup_slave_info + echo "CHANGE MASTER TO MASTER_LOG_FILE='${BASH_REMATCH[1]}',\ + MASTER_LOG_POS=${BASH_REMATCH[2]}" > change_master_to.sql.in + fi + # Check if we need to complete a clone by starting replication. + if [[ -f change_master_to.sql.in ]]; then + echo "Waiting for mysqld to be ready (accepting connections)" + until mysql -h 127.0.0.1 -e "SELECT 1"; do sleep 1; done + echo "Initializing replication from clone position" + mysql -h 127.0.0.1 \ + -e "$(