Redis 5.0.9 哨兵模式安装

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14 09月 2020
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redis 哨兵模式安装


针对于redis的系统优化

echo "vm.overcommit_memory=1" >> /etc/sysctl.conf 
echo never > /sys/kernel/mm/transparent_hugepage/enabled
echo 1024 > /proc/sys/net/core/somaxconn
echo "net.core.somaxconn = 1024" >> /etc/sysctl.conf


说明:

1、 vm.overcommit_memory=1   表示内核允许分配所有的物理内存，而不管当前的内存状态如何。

2、禁用大内存页面 transparent_hugepage=never

3、该内核参数默认值一般是128（定义了系统中每一个端口最大的监听队列的长度），对于负载很大的服务程序来说大大的不够。一般会将它修改为1024或者更大。

sysctl -p


yum -y install gcc gcc-c++ vim screen lrzsz net-tools wget curl unzip zip dos2unix lvm2 rsync git telnet tree nmap nfs-utils bash-completion bash-completion-extras


cd /opt/
wget http://download.redis.io/releases/redis-5.0.9.tar.gz
tar -zxf redis-5.0.9.tar.gz
cd redis-5.0.9
make
make install PREFIX=/usr/local/redis


mkdir -p /data/redis/6379/{conf,data,logs,run}
mkdir -p /data/redis/6380/{conf,data,logs,run}
mkdir -p /data/redis/6381/{conf,data,logs,run}


cat >> /data/redis/6379/conf/redis.conf << EOF
bind 10.10.10.87 127.0.0.1
port 6379
tcp-backlog 511
timeout 0
tcp-keepalive 300
daemonize yes
supervised no
pidfile "/data/redis/6379/run/redis.pid"
loglevel notice
logfile "/data/redis/6379/logs/redis.log"
databases 16
#重命名危险操作命令
#rename-command KEYS "nokeys"
#rename-command FLUSHALL "noflushall"
#rename-command FLUSHDB "noflushdb"
#rename-command CONFIG ""
requirepass "a123456"
masterauth "a123456"
always-show-logo yes
#save 900 1
#save 300 10
#save 60 10000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
#dbfilename "dump.rdb"
dir "/data/redis/6379/data"
replica-serve-stale-data yes
replica-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
repl-disable-tcp-nodelay no
replica-priority 100
lazyfree-lazy-eviction no
lazyfree-lazy-expire yes
lazyfree-lazy-server-del no
replica-lazy-flush no
#appendonly yes
#appendfilename "appendonly.aof"
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 1gb
aof-load-truncated yes
#aof-use-rdb-preamble no
lua-time-limit 5000
slowlog-log-slower-than 3000
slowlog-max-len 1000
latency-monitor-threshold 0
notify-keyspace-events ""
hash-max-ziplist-entries 512
hash-max-ziplist-value 64
list-max-ziplist-size -2
list-compress-depth 0
set-max-intset-entries 512
zset-max-ziplist-entries 128
zset-max-ziplist-value 64
hll-sparse-max-bytes 3000
stream-node-max-bytes 4096
stream-node-max-entries 100
activerehashing yes
client-output-buffer-limit normal 0 0 0
client-output-buffer-limit replica 256mb 64mb 60
client-output-buffer-limit pubsub 32mb 8mb 60
hz 10
dynamic-hz yes
aof-rewrite-incremental-fsync yes
rdb-save-incremental-fsync yes
# Generated by CONFIG REWRITE
#maxmemory 3906250kb
#maxmemory-policy allkeys-lfu
EOF


cat /data/redis/6379/conf/redis.conf | sed 's/6379/6380/g' > /data/redis/6380/conf/redis.conf
cat /data/redis/6379/conf/redis.conf | sed 's/6379/6381/g' > /data/redis/6381/conf/redis.conf


启动

/usr/local/redis/bin/redis-server /data/redis/6379/conf/redis.conf
/usr/local/redis/bin/redis-server /data/redis/6380/conf/redis.conf
/usr/local/redis/bin/redis-server /data/redis/6381/conf/redis.conf


设置主从关系

启动之后在从库上使用redis-cli登录，执行

SLAVEOF 10.10.10.87(主库ip) 6379


[root@redis conf]# redis-cli -p 6380

127.0.0.1:6380> auth a123456

OK

127.0.0.1:6380> SLAVEOF 10.10.10.87 6379

OK

127.0.0.1:6380> exit

[root@redis conf]# redis-cli -p 6381

127.0.0.1:6381> auth a123456

OK

127.0.0.1:6381> SLAVEOF 10.10.10.87 6379

OK

127.0.0.1:6381> exit






sentinel安装，3个节点

mkdir -p /data/redis/26379/{conf,data,logs,run}
mkdir -p /data/redis/26380/{conf,data,logs,run}
mkdir -p /data/redis/26381/{conf,data,logs,run}


cat >> /data/redis/26379/conf/sentinel.conf << EOF
bind 10.10.10.87 127.0.0.1
port 26379
# Generated by CONFIG REWRITE
protected-mode no
pidfile "/data/redis/26379/run/sentinel.pid"
logfile "/data/redis/26379/logs/sentinel.log"
daemonize yes
requirepass "a123456"
dir "/data/redis/26379/data"
sentinel deny-scripts-reconfig yes
sentinel monitor mymaster 10.10.10.87 6379 2
sentinel down-after-milliseconds mymaster 6000
sentinel failover-timeout mymaster 18000
sentinel auth-pass mymaster a123456
EOF


cat /data/redis/26379/conf/sentinel.conf | sed 's/26379/26380/g' > /data/redis/26380/conf/sentinel.conf
cat /data/redis/26379/conf/sentinel.conf | sed 's/26379/26381/g' > /data/redis/26381/conf/sentinel.conf


启动sentinel

/usr/local/redis/bin/redis-sentinel /data/redis/26379/conf/sentinel.conf
/usr/local/redis/bin/redis-sentinel /data/redis/26380/conf/sentinel.conf
/usr/local/redis/bin/redis-sentinel /data/redis/26381/conf/sentinel.conf


sentinel根据集群名称和监控的集群主库ip来确定自己的身份，3个都是监控同一个，所以它们自认为是一伙的，组成集群。


验证，关闭redis的主节点，查看从节点是否会提权为master

略



查看redis相关信息

[root@redis redis]# redis-cli -p 6379
127.0.0.1:6379> auth a123456
OK
127.0.0.1:6379> info
# Server
redis_version:5.0.9
redis_git_sha1:00000000
redis_git_dirty:0
redis_build_id:5f7af018c570b04d
redis_mode:standalone
os:Linux 3.10.0-1127.el7.x86_64 x86_64
arch_bits:64
multiplexing_api:epoll
atomicvar_api:atomic-builtin
gcc_version:4.8.5
process_id:18771
run_id:9526eff38ce373379578cd4c7339ec44575a7396
tcp_port:6379
uptime_in_seconds:1200
uptime_in_days:0
hz:10
configured_hz:10
lru_clock:6235156
executable:/usr/local/redis/bin/redis-server
config_file:/data/redis/6379/conf/redis.conf
# Clients
connected_clients:7
client_recent_max_input_buffer:2
client_recent_max_output_buffer:0
blocked_clients:0
# Memory
used_memory:2071744
used_memory_human:1.98M
used_memory_rss:7929856
used_memory_rss_human:7.56M
used_memory_peak:2254272
used_memory_peak_human:2.15M
used_memory_peak_perc:91.90%
used_memory_overhead:2025078
used_memory_startup:791432
used_memory_dataset:46666
used_memory_dataset_perc:3.64%
allocator_allocated:2155496
allocator_active:2424832
allocator_resident:4902912
total_system_memory:1907748864
total_system_memory_human:1.78G
used_memory_lua:37888
used_memory_lua_human:37.00K
used_memory_scripts:0
used_memory_scripts_human:0B
number_of_cached_scripts:0
maxmemory:0
maxmemory_human:0B
maxmemory_policy:noeviction
allocator_frag_ratio:1.12
allocator_frag_bytes:269336
allocator_rss_ratio:2.02
allocator_rss_bytes:2478080
rss_overhead_ratio:1.62
rss_overhead_bytes:3026944
mem_fragmentation_ratio:3.76
mem_fragmentation_bytes:5818456
mem_not_counted_for_evict:0
mem_replication_backlog:1048576
mem_clients_slaves:33844
mem_clients_normal:151226
mem_aof_buffer:0
mem_allocator:jemalloc-5.1.0
active_defrag_running:0
lazyfree_pending_objects:0
# Persistence
loading:0
rdb_changes_since_last_save:0
rdb_bgsave_in_progress:0
rdb_last_save_time:1600069707
rdb_last_bgsave_status:ok
rdb_last_bgsave_time_sec:0
rdb_current_bgsave_time_sec:-1
rdb_last_cow_size:4382720
aof_enabled:0
aof_rewrite_in_progress:0
aof_rewrite_scheduled:0
aof_last_rewrite_time_sec:-1
aof_current_rewrite_time_sec:-1
aof_last_bgrewrite_status:ok
aof_last_write_status:ok
aof_last_cow_size:0
# Stats
total_connections_received:15
total_commands_processed:4779
instantaneous_ops_per_sec:6
total_net_input_bytes:221921
total_net_output_bytes:1256131
instantaneous_input_kbps:0.38
instantaneous_output_kbps:1.27
rejected_connections:0
sync_full:2
sync_partial_ok:0
sync_partial_err:2
expired_keys:0
expired_stale_perc:0.00
expired_time_cap_reached_count:0
evicted_keys:0
keyspace_hits:0
keyspace_misses:0
pubsub_channels:1
pubsub_patterns:0
latest_fork_usec:392
migrate_cached_sockets:0
slave_expires_tracked_keys:0
active_defrag_hits:0
active_defrag_misses:0
active_defrag_key_hits:0
active_defrag_key_misses:0
# Replication
role:master
connected_slaves:2
slave0:ip=10.10.10.87,port=6380,state=online,offset=122352,lag=0
slave1:ip=10.10.10.87,port=6381,state=online,offset=122352,lag=0
master_replid:8b754d609948618e3a060acbdd4f606ed2bbeeae
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:122352
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:122352
# CPU
used_cpu_sys:0.897805
used_cpu_user:0.773390
used_cpu_sys_children:0.026664
used_cpu_user_children:0.001995
# Cluster
cluster_enabled:0



查看sentinel相关信息

[root@redis redis]# redis-cli -p 26379
127.0.0.1:26379> auth a123456
OK
127.0.0.1:26379> info
# Server
redis_version:5.0.9
redis_git_sha1:00000000
redis_git_dirty:0
redis_build_id:5f7af018c570b04d
redis_mode:sentinel
os:Linux 3.10.0-1127.el7.x86_64 x86_64
arch_bits:64
multiplexing_api:epoll
atomicvar_api:atomic-builtin
gcc_version:4.8.5
process_id:19085
run_id:2240f5729747ac379f9b9fc1d720c9a21a50814d
tcp_port:26379
uptime_in_seconds:551
uptime_in_days:0
hz:13
configured_hz:10
lru_clock:6235223
executable:/usr/local/redis/bin/redis-sentinel
config_file:/data/redis/26379/conf/sentinel.conf
# Clients
connected_clients:3
client_recent_max_input_buffer:2
client_recent_max_output_buffer:0
blocked_clients:0
# CPU
used_cpu_sys:0.826220
used_cpu_user:0.603381
used_cpu_sys_children:0.000000
used_cpu_user_children:0.000000
# Stats
total_connections_received:3
total_commands_processed:1599
instantaneous_ops_per_sec:3
total_net_input_bytes:88716
total_net_output_bytes:9629
instantaneous_input_kbps:0.29
instantaneous_output_kbps:0.02
rejected_connections:0
sync_full:0
sync_partial_ok:0
sync_partial_err:0
expired_keys:0
expired_stale_perc:0.00
expired_time_cap_reached_count:0
evicted_keys:0
keyspace_hits:0
keyspace_misses:0
pubsub_channels:0
pubsub_patterns:0
latest_fork_usec:0
migrate_cached_sockets:0
slave_expires_tracked_keys:0
active_defrag_hits:0
active_defrag_misses:0
active_defrag_key_hits:0
active_defrag_key_misses:0
# Sentinel
sentinel_masters:1
sentinel_tilt:0
sentinel_running_scripts:0
sentinel_scripts_queue_length:0
sentinel_simulate_failure_flags:0
master0:name=mymaster,status=ok,address=10.10.10.87:6379,slaves=2,sentinels=3


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