Redis系列：單機主從模式搭建
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? ? ? ? 無論哪種中間件的搭建，正常主從模式搭建需要搭建在兩臺不同的服務器上才是正規(guī)的主從搭建模式。因為由于資源的限制，今天來演示一下在同一臺服務器上，基于端口不一致搭建Redis的單機主從模式。
如果是不同的Linux服務器搭建Redis主從模式，只需準備兩臺Linux服務器即可，例如兩臺Liunx服務器的IP地址為192.168.79.129和192.168.79.130。在這里兩臺Linux安裝單機模式部署兩臺Redis，參考【Redis系列：Linux下部署Redis 6.x 版本】
如何同一臺Linux服務器搭建Redis主從模式，則先參考【Redis系列：Linux下部署Redis 6.x 版本】搭建單機版Redis，然后準備兩個Redis的配置文件，例如分別為redis-6379.conf和redis-6380.conf，分別代表端口為6379的redis服務和端口為6380的redis服務。
0x01：基于單機版的redis.conf準備主從配置文件
執(zhí)行以下命令復制兩個配置文件
cp?/usr/local/redis/etc/redis.conf?/usr/local/redis/etc/redis-6379.conf
cp?/usr/local/redis/etc/redis.conf?/usr/local/redis/etc/redis-6380.conf
其中redis-6379.conf主，redis-6380.conf從。
0x02：修改redis-6379.conf和redis-6380.conf配置文件
分別先修改redis-6379.conf和redis-6380.conf配置文件的bind選項，綁定自己的IP地址。因為是同一臺Linux服務器，所以這個配置項是一樣的。
#redis-6379.conf
bind?127.0.0.1?192.168.122.1
#redis-6380.conf
bind?127.0.0.1?192.168.122.1
差異化修改
主redis-6379.conf
port?6379
dbfilename?dump-6379.rdb
requirepass?new2020
pidfile?/var/run/redis_6379.pid
從redis-6380.conf
port?6380
dbfilename?dump-6380.rdb
requirepass?new2020
pidfile?/var/run/redis_6380.pid
replicaof?192.168.122.1?6379
masterauth?new2020
- 使用如下命令，啟動主Redis
./redis-server?/usr/local/redis/etc/redis-6379.conf?
./redis-cli?-h?192.168.122.1?-p?6379
- 使用如下命令，啟動從Redis
./redis-server?/usr/local/redis/etc/redis-6380.conf?
- 驗證redis-6379與redis-6380是否形成主從模式
192.168.122.1:6379>?info
#?Server
redis_version:6.0.7
redis_git_sha1:00000000
redis_git_dirty:0
redis_build_id:e15fc28d4c56c2df
redis_mode:standalone
os:Linux?3.10.0-1062.el7.x86_64?x86_64
arch_bits:64
multiplexing_api:epoll
atomicvar_api:atomic-builtin
gcc_version:9.3.1
process_id:4848
run_id:b2aed4fed2071bbfd2cf533e556e23646c6e2e86
tcp_port:6379
uptime_in_seconds:724
uptime_in_days:0
hz:10
configured_hz:10
lru_clock:7249429
executable:/usr/local/redis/bin/./redis-server
config_file:/usr/local/redis/etc/redis-6379.conf
io_threads_active:0
#?Clients
connected_clients:1
client_recent_max_input_buffer:2
client_recent_max_output_buffer:0
blocked_clients:0
tracking_clients:0
clients_in_timeout_table:0
#?Memory
used_memory:1937064
used_memory_human:1.85M
used_memory_rss:2805760
used_memory_rss_human:2.68M
used_memory_peak:1937064
used_memory_peak_human:1.85M
used_memory_peak_perc:100.08%
used_memory_overhead:1885804
used_memory_startup:803184
used_memory_dataset:51260
used_memory_dataset_perc:4.52%
allocator_allocated:2053032
allocator_active:2379776
allocator_resident:6713344
total_system_memory:1927323648
total_system_memory_human:1.79G
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:1.16
allocator_frag_bytes:326744
allocator_rss_ratio:2.82
allocator_rss_bytes:4333568
rss_overhead_ratio:0.42
rss_overhead_bytes:-3907584
mem_fragmentation_ratio:1.45
mem_fragmentation_bytes:870248
mem_not_counted_for_evict:0
mem_replication_backlog:1048576
mem_clients_slaves:16986
mem_clients_normal:16986
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:1601084822
rdb_last_bgsave_status:ok
rdb_last_bgsave_time_sec:0
rdb_current_bgsave_time_sec:-1
rdb_last_cow_size:262144
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
module_fork_in_progress:0
module_fork_last_cow_size:0
#?Stats
total_connections_received:46
total_commands_processed:134
instantaneous_ops_per_sec:1
total_net_input_bytes:11349
total_net_output_bytes:7679
instantaneous_input_kbps:0.04
instantaneous_output_kbps:0.00
rejected_connections:0
sync_full:1
sync_partial_ok:0
sync_partial_err:0
expired_keys:0
expired_stale_perc:0.00
expired_time_cap_reached_count:0
expire_cycle_cpu_milliseconds:9
evicted_keys:0
keyspace_hits:0
keyspace_misses:0
pubsub_channels:0
pubsub_patterns:0
latest_fork_usec:149
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
tracking_total_keys:0
tracking_total_items:0
tracking_total_prefixes:0
unexpected_error_replies:0
total_reads_processed:391
total_writes_processed:232
io_threaded_reads_processed:0
io_threaded_writes_processed:0
#?Replication
role:master
connected_slaves:1
slave0:ip=127.0.0.1,port=6380,state=online,offset=168,lag=0
master_replid:168adabf704ba8a93a9285e200093b84352d3ac7
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:168
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:168
#?CPU
used_cpu_sys:0.320768
used_cpu_user:0.308592
used_cpu_sys_children:0.001414
used_cpu_user_children:0.000000
#?Modules
#?Cluster
cluster_enabled:0
#?Keyspace
db0:keys=1,expires=0,avg_ttl=0
192.168.122.1:6379>?
192.168.122.1:6380>?info
#?Server
redis_version:6.0.7
redis_git_sha1:00000000
redis_git_dirty:0
redis_build_id:e15fc28d4c56c2df
redis_mode:standalone
os:Linux?3.10.0-1062.el7.x86_64?x86_64
arch_bits:64
multiplexing_api:epoll
atomicvar_api:atomic-builtin
gcc_version:9.3.1
process_id:5288
run_id:589ba5025a924c2d962bbbe0a8f85913d4d2c50a
tcp_port:6380
uptime_in_seconds:295
uptime_in_days:0
hz:10
configured_hz:10
lru_clock:7249597
executable:/usr/local/redis/bin/./redis-server
config_file:/usr/local/redis/etc/redis-6380.conf
io_threads_active:0
#?Clients
connected_clients:2
client_recent_max_input_buffer:2
client_recent_max_output_buffer:0
blocked_clients:0
tracking_clients:0
clients_in_timeout_table:0
#?Memory
used_memory:1936344
used_memory_human:1.85M
used_memory_rss:2859008
used_memory_rss_human:2.73M
used_memory_peak:1936344
used_memory_peak_human:1.85M
used_memory_peak_perc:100.08%
used_memory_overhead:1885860
used_memory_startup:803208
used_memory_dataset:50484
used_memory_dataset_perc:4.46%
allocator_allocated:2191304
allocator_active:2502656
allocator_resident:4780032
total_system_memory:1927323648
total_system_memory_human:1.79G
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:1.14
allocator_frag_bytes:311352
allocator_rss_ratio:1.91
allocator_rss_bytes:2277376
rss_overhead_ratio:0.60
rss_overhead_bytes:-1921024
mem_fragmentation_ratio:1.51
mem_fragmentation_bytes:965168
mem_not_counted_for_evict:0
mem_replication_backlog:1048576
mem_clients_slaves:0
mem_clients_normal:33972
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:1601084822
rdb_last_bgsave_status:ok
rdb_last_bgsave_time_sec:-1
rdb_current_bgsave_time_sec:-1
rdb_last_cow_size:0
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
module_fork_in_progress:0
module_fork_last_cow_size:0
#?Stats
total_connections_received:1
total_commands_processed:30
instantaneous_ops_per_sec:0
total_net_input_bytes:649
total_net_output_bytes:10505
instantaneous_input_kbps:0.00
instantaneous_output_kbps:0.04
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
expire_cycle_cpu_milliseconds: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
tracking_total_keys:0
tracking_total_items:0
tracking_total_prefixes:0
unexpected_error_replies:0
total_reads_processed:32
total_writes_processed:295
io_threaded_reads_processed:0
io_threaded_writes_processed:0
#?Replication
role:slave
master_host:192.168.122.1
master_port:6379
master_link_status:up
master_last_io_seconds_ago:7
master_sync_in_progress:0
slave_repl_offset:406
slave_priority:100
slave_read_only:1
connected_slaves:0
master_replid:168adabf704ba8a93a9285e200093b84352d3ac7
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:406
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:406
#?CPU
used_cpu_sys:0.095399
used_cpu_user:0.166949
used_cpu_sys_children:0.000000
used_cpu_user_children:0.000000
#?Modules
#?Cluster
cluster_enabled:0
#?Keyspace
db0:keys=1,expires=0,avg_ttl=0
192.168.122.1:6380>?
- 在主redis-6379寫數(shù)據，在從redis-6380讀數(shù)據
在從redis-6380寫數(shù)據
直接報錯，顯示不能進行寫操作
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