我有pgpool的配置:「主機-1」主機和「主機-2」從機,如果「主機-1」關閉,pgpool正確地推動「主機-2」成爲主機;但是如果「Host-1」返回,pgpool不知道這一點,並且如果「Host-2」關閉,即使「Host-1」爲「是」,pgpool也不會促使「主機-1」成爲主設備線上。 我啓用了health_check,但它看起來完全沒用,因爲「Host-1」的狀態(變成up後)總是3 =「Node is down」。pgpool-II:是否有可能促使一個節點掌握多次?
這是命令 「秀pool_nodes」 的事件時的輸出:
- >最初的情況: 「主機-1」 UP(主) 「主機2」 UP(從)
node_id | hostname | port | status | lb_weight | role
---------+----------+------+--------+-----------+--------
0 | Host-1 | 5432 | 2 | nan | master
1 | Host-2 | 5432 | 1 | nan | slave
- >節點0下降: 「主機-1」 DOWN 「主機2」 UP
node_id | hostname | port | status | lb_weight | role
---------+----------+------+--------+-----------+--------
0 | Host-1 | 5432 | 3 | nan | slave
1 | Host-2 | 5432 | 2 | nan | master
- >節點0返回起來: 「主機1」 UP 「主機2」 UP
node_id | hostname | port | status | lb_weight | role
---------+----------+------+--------+-----------+--------
0 | Host-1 | 5432 | 3 | nan | slave
1 | Host-2 | 5432 | 2 | nan | master
注意到的但是 「主機-1」 是3,這意味着狀態 「節點是向下」
- >節點1下降: 「主機-1」 UP 「主機2」 DOWN:在這一點我不能連接到數據庫,即使節點0已啓動並運行!
我要做些什麼來允許pgpool來提升主節點0的時間? 如果是有用的,這些都是部分「後端連接設置」和我pgpool.conf的「健康檢查」:
# - Backend Connection Settings -
backend_hostname0 = 'Host-1'
# Host name or IP address to connect to for backend 0
backend_port0 = 5432
# Port number for backend 0
#backend_weight0 = 1
# Weight for backend 0 (only in load balancing mode)
#backend_data_directory0 = '/data'
# Data directory for backend 0
backend_flag0 = 'ALLOW_TO_FAILOVER'
# Controls various backend behavior
# ALLOW_TO_FAILOVER or DISALLOW_TO_FAILOVER
backend_hostname1 = 'Host-2'
# Host name or IP address to connect to for backend 0
backend_port1 = 5432
# Port number for backend 0
#backend_weight1 = 1
# Weight for backend 0 (only in load balancing mode)
#backend_data_directory1 = '/data'
# Data directory for backend 0
backend_flag1 = 'ALLOW_TO_FAILOVER'
# Controls various backend behavior
# ALLOW_TO_FAILOVER or DISALLOW_TO_FAILOVER
#------------------------------------------------------------------------------
# HEALTH CHECK
#------------------------------------------------------------------------------
health_check_period = 10
# Health check period
# Disabled (0) by default
health_check_timeout = 20
# Health check timeout
# 0 means no timeout
health_check_user = 'admin'
# Health check user
health_check_password = '12345'
# Password for health check user
health_check_max_retries = 10
# Maximum number of times to retry a failed health check before giving up.
health_check_retry_delay = 1
# Amount of time to wait (in seconds) between retries.
這與Slony沒有任何關係。一旦複製重新建立,pgpool將不會注意到 - 但必須*告訴*節點已啓動。正如@ Ochko的答案所表明的那樣,使用「附加」來完成此操作 - 即使它看起來已附加,也必須「重新附加」。今晚在pgpool服務器上看到了這一點,並且令人頭疼。 –