EDIT：下面描述了我最初的問題，但只要我還沒有解決問題，我想也許我應該更改創建的mysqlPOD 內的設置，而不是mysql本地計算機上的配置文件。但是當我嘗試在 POD 內進行任何更改時，mysql我收到command not found錯誤！

Question

EDIT：下面描述了我最初的問題，但只要我還沒有解決問題，我想也許我應該更改創建的mysqlPOD 內的設置，而不是mysql本地計算機上的配置文件。但是當我嘗試在 POD 內進行任何更改時，mysql我收到command not found錯誤！

我嘗試在mysql本地部署一個在叢集Kubernetes上運行的映像Kind，如下所示：

我嘗試kubectl create secret generic mysql-secret --from-literal MYSQL_KEY=11111並創建mysql-server如下：

mysql-secret Opaque 1 3d21h

這是mysql-pv.yaml文件：

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: mysql-pv-claim
spec:
  storageClassName: manual
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 20Gi
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: mysql-pv-volume
  labels:
    type: local
spec:
  storageClassName: manual
  capacity:
    storage: 20Gi
  accessModes:
    - ReadWriteOnce
  hostPath:
    path: "/mnt/data"

我這樣做了kubectl apply -f mysql-pv.yaml並且創建成功了。

This is `mysql-depl.yaml` file:
apiVersion: apps/v1
kind: Deployment
metadata:
  name: mysql
spec:
  selector:
    matchLabels:
      app: mysql
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: mysql
    spec:
      containers:
      - image: mysql
        name: mysql
        env:
        - name: MYSQL_ROOT_PASSWORD
          valueFrom:
            secretKeyRef:
              name: mysql-secret
              key: MYSQL_KEY
        ports:
        - containerPort: 3306
          name: mysql
        volumeMounts:
        - name: mysql-persistent-storage
          mountPath: /var/lib/mysql
      volumes:
      - name: mysql-persistent-storage
        persistentVolumeClaim:
          claimName: mysql-pv-claim
---
apiVersion: v1
kind: Service
metadata:
  name: mysql
spec:
  ports:
  - port: 3306
  selector:
    app: mysql
  clusterIP: None

我這樣做了kubectl apply -f mysql-depl.yaml並且創建成功了。

但是當我想使用then命令mysql在其相關的 pod 內運行時，它會要求輸入密碼，輸入密碼（）後我得到：kubectl exec -it <mysql-pod-name> shmysql -p11111

ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)

這是/etc/mysql/my.cnf內容：

#
# The MySQL database server configuration file.
#
# You can copy this to one of:
# - "/etc/mysql/my.cnf" to set global options,
# - "~/.my.cnf" to set user-specific options.
# 
# One can use all long options that the program supports.
# Run program with --help to get a list of available options and with
# --print-defaults to see which it would actually understand and use.
#
# For explanations see
# http://dev.mysql.com/doc/mysql/en/server-system-variables.html

#
# * IMPORTANT: Additional settings that can override those from this file!
#   The files must end with '.cnf', otherwise they'll be ignored.
#

!includedir /etc/mysql/conf.d/
!includedir /etc/mysql/mysql.conf.d/

裡面/etc/mysql/conf.d/有兩個文件。mysql.cnf如下：

[mysql]
socket  = /var/run/mysqld/mysqld.sock
[client]
socket  = /var/run/mysqld/mysqld.sock

並mysqldump.cnf如下：

[mysqldump]
quick
quote-names
max_allowed_packet  = 16M

同樣在/etc/mysql/mysql.conf.d/目錄內，有兩個檔案mysql.cnf：

#
# The MySQL database client configuration file
#
# Ref to https://dev.mysql.com/doc/refman/en/mysql-command-options.html

[mysql]
socket  = /var/run/mysqld/mysqld.sock
[client]
socket  = /var/run/mysqld/mysqld.sock

和mysqld.cnf：

#
# The MySQL database server configuration file.
#
# One can use all long options that the program supports.
# Run program with --help to get a list of available options and with
# --print-defaults to see which it would actually understand and use.
#
# For explanations see
# http://dev.mysql.com/doc/mysql/en/server-system-variables.html

# Here is entries for some specific programs
# The following values assume you have at least 32M ram

[mysqld]
#
# * Basic Settings
#
user        = mysql
pid-file    = /var/run/mysqld/mysqld.pid
socket  = /var/run/mysqld/mysqld.sock
port        = 3306
datadir = /var/lib/mysql


# If MySQL is running as a replication slave, this should be
# changed. Ref https://dev.mysql.com/doc/refman/8.0/en/server-system-variables.html#sysvar_tmpdir
# tmpdir        = /tmp
#
# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
bind-address        = 127.0.0.1
mysqlx-bind-address = 127.0.0.1
#
# * Fine Tuning
#
key_buffer_size     = 16M
# max_allowed_packet    = 64M
# thread_stack      = 256K

# thread_cache_size       = -1

# This replaces the startup script and checks MyISAM tables if needed
# the first time they are touched
myisam-recover-options  = BACKUP

# max_connections        = 151

# table_open_cache       = 4000

#
# * Logging and Replication
#
# Both location gets rotated by the cronjob.
#
# Log all queries
# Be aware that this log type is a performance killer.
# general_log_file        = /var/log/mysql/query.log
# general_log             = 1
#
# Error log - should be very few entries.
#
log_error = /var/log/mysql/error.log
#
# Here you can see queries with especially long duration
# slow_query_log        = 1
# slow_query_log_file   = /var/log/mysql/mysql-slow.log
# long_query_time = 2
# log-queries-not-using-indexes
#
# The following can be used as easy to replay backup logs or for replication.
# note: if you are setting up a replication slave, see README.Debian about
#       other settings you may need to change.
# server-id     = 1
# log_bin           = /var/log/mysql/mysql-bin.log
# binlog_expire_logs_seconds    = 2592000
max_binlog_size   = 100M
# binlog_do_db      = include_database_name
# binlog_ignore_db  = include_database_name

此外，我有以下文件/var/run/mysqld/：

mysqld.pid mysqld.sock mysqld.sock.lock mysqlx.sock mysqlx.sock.lock

Answer 1

我猜你忘記了 mysql 容器的密碼環境變數。請仔細檢查此步驟。

Answer 2

當實體儲存上的套接字檔案 (mysql.sock) 和容器中的 /var/run/mysqld/mysqld.sock 之間的符號連結損壞時，可能會出現此錯誤。

您的實體儲存已安裝到 /var/lib/mysql，因此您將在容器中的 /var/lib/mysql/mysql.sock 中找到 mysql.sock 檔案。

如果是這樣：

1. exec 進入 mysql 容器以獲得 bash 提示符

2. 運行'ln -s /var/lib/mysql/mysql.sock /var/run/mysqld/mysqld.sock'

3. 然後嘗試運行 mysql -u -p ...etc 登入

如果您的 mysql 工作台仍然不滿意，您可能需要執行「刷新主機」。