{"id":33502,"date":"2023-12-19T03:39:04","date_gmt":"2024-01-08T05:43:15","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%b0%9d%e8%af%95%e4%bd%bf%e7%94%a8-redis-py-%e8%ae%bf%e9%97%ae-redis-sentinel-2\/"},"modified":"2024-05-04T14:14:33","modified_gmt":"2024-05-04T06:14:33","slug":"%e5%b0%9d%e8%af%95%e4%bd%bf%e7%94%a8-redis-py-%e8%ae%bf%e9%97%ae-redis-sentinel-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%b0%9d%e8%af%95%e4%bd%bf%e7%94%a8-redis-py-%e8%ae%bf%e9%97%ae-redis-sentinel-2\/","title":{"rendered":"\u5c1d\u8bd5\u4f7f\u7528 redis-py \u8bbf\u95ee Redis Sentinel"},"content":{"rendered":"

\u592a\u957f\u4e0d\u770b<\/h1>\n

redis-py\u306fRedis Sentinel\u306b\u5bfe\u5fdc\u3057\u305f\u30e2\u30b8\u30e5\u30fc\u30eb\u304c\u3042\u308b\u306e\u3067\u3001\u305d\u3061\u3089\u3092\u4f7f\u3063\u3066Redis Sentinel\u306b\u30a2\u30af\u30bb\u30b9\u304c\u53ef\u80fd
\nRedis Sentinel\u7d4c\u7531\u3067\u53d6\u5f97\u3057\u305fRedis\u3078\u306e\u63a5\u7d9a\u306f\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u30d7\u30fc\u30eb\u3067\u3042\u308a\u3001\u901a\u5e38\u306eRedis\u3078\u306e\u64cd\u4f5c\u3068\u540c\u69d8\u306b\u5229\u7528\u53ef\u80fd
\n\u30de\u30b9\u30bf\u30fc\u304c\u30c0\u30a6\u30f3\u3057\u305f\u969b\u306b\u4f7f\u3063\u3066\u3044\u305f\u63a5\u7d9a\uff08\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u30d7\u30fc\u30eb\uff09\u306f\u3001\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\u306b\u8ffd\u5f93\u3057\u3066\u304f\u308c\u308b<\/p>\n

\u73af\u5883<\/h1>\n

\u8fd9\u6b21\u7684\u73af\u5883\u662f\u8fd9\u91cc\u3002<\/p>\n

$ <\/span>cat<\/span> \/etc\/redhat-release \r\nCentOS Linux release 7.6.1810 (<\/span>Core)<\/span>\r\n\r\n\r\n$ <\/span>uname<\/span> -a<\/span>\r\nLinux localhost.localdomain 3.10.0-957.12.2.el7.x86_64 #1 SMP Tue May 14 21:24:32 UTC 2019 x86_64 x86_64 x86_64 GNU\/Linux<\/span>\r\n\r\n\r\n$ <\/span>redis-server -v<\/span>\r\nRedis server v<\/span>=<\/span>5.0.6 sha<\/span>=<\/span>00000000:0 malloc<\/span>=<\/span>jemalloc-5.1.0 bits<\/span>=<\/span>64 build<\/span>=<\/span>c3d7ebb6b1a2844b\r\n\r\n\r\n$ <\/span>redis-sentinel -v<\/span>\r\nRedis server v<\/span>=<\/span>5.0.6 sha<\/span>=<\/span>00000000:0 malloc<\/span>=<\/span>jemalloc-5.1.0 bits<\/span>=<\/span>64 build<\/span>=<\/span>c3d7ebb6b1a2844b\r\n\r\n\r\n$ <\/span>python -V<\/span>\r\nPython 3.6.8\r\n\r\n\r\n$ <\/span>pip3 freeze\r\nredis<\/span>==<\/span>3.3.8\r\n<\/code><\/pre>\n
\u4ee5\u4e0b\u662f\u4e00\u79cd\u53ef\u80fd\u7684\u4e2d\u6587\u8f6c\u8ff0\uff1a
\nCentOS 7\u3001Redis 5.0.6\u3001Python 3.6.8\u4ee5\u53caredis-py 3.3.8\u3002<\/p>\n
\u6bcf\u4e2a\u670d\u52a1\u5668\u90fd\u4f1a\u6309\u7167\u4ee5\u4e0b\u7684\u65b9\u5f0f\u51c6\u5907\u3002<\/p>\n
    \n
  • \n
      \u30de\u30b9\u30bf\u30fc \u2026 192.168.33.10<\/ul>\n<\/li>\n<\/ul>\n
      \u30ec\u30d7\u30ea\u30ab \u2026 192.168.33.11<\/p>\n
      Sentinel 1\u301c3 \u2026 192.168.33.12\u301c194.168.33.14<\/p>\n
      \u30af\u30e9\u30a4\u30a2\u30f3\u30c8 \u2026 192.168.33.15<\/p>\n
      \u5efa\u7acb Redis Sentinel<\/h1>\n
      \u9996\u5148\uff0c\u6211\u4eec\u6765\u6784\u5efaRedis Sentinal\u3002<\/p>\n
      \u4eceEPEL\u6e90\u5b89\u88c5Redis\u3002<\/p>\n
      $ <\/span>sudo <\/span>yum install <\/span>epel-release\r\n$ <\/span>sudo <\/span>yum install <\/span>https:\/\/rpms.remirepo.net\/enterprise\/remi-release-7.rpm\r\n$ <\/span>sudo <\/span>yum --enablerepo<\/span>=<\/span>remi install <\/span>redis\r\n<\/code><\/pre>\n
      \u9996\u5148\uff0c\u914d\u7f6eRedis\u7684\u590d\u5236\u529f\u80fd\u3002<\/p>\n
      Redis\u7684\u4e3b\u670d\u52a1\u5668\u5df2\u4ece\u9ed8\u8ba4\u8bbe\u7f6e\uff08\u5728\/etc\/redis.conf\u4e2d\uff09\u8fdb\u884c\u4e86\u4ee5\u4e0b\u66f4\u6539\u3002
      \n\u203b\u5b8c\u6574\u7684\u9ed8\u8ba4\u8bbe\u7f6e\u5c06\u5728\u6700\u540e\u5217\u51fa\u3002<\/p>\n
      bind <\/span>0.0.0.0\r\n<\/code><\/pre>\n
      \u590d\u5236\u8bbe\u7f6e\u4ece\/etc\/redis.conf\u7684\u9ed8\u8ba4\u8bbe\u7f6e\u505a\u5982\u4e0b\u66f4\u6539\u3002<\/p>\n
      bind <\/span>0.0.0.0\r\n\r\nreplicaof 192.168.33.10 6379\r\n<\/code><\/pre>\n
      \u8bf7\u5206\u522b\u542f\u52a8Redis\u7684\u4e3b\u8282\u70b9\u548c\u526f\u672c\u8282\u70b9\u3002<\/p>\n
      $ <\/span>sudo <\/span>systemctl start redis\r\n<\/code><\/pre>\n
      \u786e\u8ba4\u590d\u5236\u529f\u80fd\u6b63\u5728\u8fd0\u884c\u3002<\/p>\n
      \u4e3b\u4eba\u7684\u90a3\u4e00\u65b9\u3002<\/p>\n
      $ <\/span>redis-cli -h<\/span> 192.168.33.10\r\n192.168.33.10:6379> info replication\r\n# Replication<\/span>\r\nrole:master\r\nconnected_slaves:1\r\nslave0:ip=<\/span>192.168.33.11,port=<\/span>6379,state=<\/span>online,offset=<\/span>28,lag=<\/span>0\r\nmaster_replid:54810ab6453ffdf12f21ff34157e2e0d655f8a81\r\nmaster_replid2:0000000000000000000000000000000000000000\r\nmaster_repl_offset:28\r\nsecond_repl_offset:-1\r\nrepl_backlog_active:1\r\nrepl_backlog_size:1048576\r\nrepl_backlog_first_byte_offset:1\r\nrepl_backlog_histlen:28\r\n<\/code><\/pre>\n
      \u590d\u5236\u54c1\u65b9\u3002<\/p>\n
      $ <\/span>redis-cli -h<\/span> 192.168.33.11\r\n192.168.33.11:6379> info replication\r\n# Replication<\/span>\r\nrole:slave\r\nmaster_host:192.168.33.10\r\nmaster_port:6379\r\nmaster_link_status:up\r\nmaster_last_io_seconds_ago:6\r\nmaster_sync_in_progress:0\r\nslave_repl_offset:56\r\nslave_priority:100\r\nslave_read_only:1\r\nconnected_slaves:0\r\nmaster_replid:54810ab6453ffdf12f21ff34157e2e0d655f8a81\r\nmaster_replid2:0000000000000000000000000000000000000000\r\nmaster_repl_offset:56\r\nsecond_repl_offset:-1\r\nrepl_backlog_active:1\r\nrepl_backlog_size:1048576\r\nrepl_backlog_first_byte_offset:1\r\nrepl_backlog_histlen:56\r\n<\/code><\/pre>\n
      \u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u914d\u7f6eRedis Sentinel\u3002\u6211\u4eec\u5c06\u4ece\/etc\/redis-sentinel.conf\u7684\u9ed8\u8ba4\u8bbe\u7f6e\u4e2d\u505a\u5982\u4e0b\u66f4\u6539\u3002
      \n\u203b\u5b8c\u6574\u7684\u9ed8\u8ba4\u8bbe\u7f6e\u5c06\u5728\u6700\u540e\u9644\u4e0a\u3002<\/p>\n
      sentinel monitor mymaster 192.168.33.10 6379 2\r\n<\/code><\/pre>\n
      \u4f7f\u75283\u53f0Redis Sentinel\u8fdb\u884c\u542f\u52a8\u3002<\/p>\n
      $ <\/span>sudo <\/span>systemctl start redis-sentinel\r\n<\/code><\/pre>\n
      \u786e\u5b9a\u3002<\/p>\n
      $ <\/span>redis-cli -h<\/span> 192.168.33.12 -p<\/span> 26379\r\n192.168.33.12:26379> info sentinel\r\n# Sentinel<\/span>\r\nsentinel_masters:1\r\nsentinel_tilt:0\r\nsentinel_running_scripts:0\r\nsentinel_scripts_queue_length:0\r\nsentinel_simulate_failure_flags:0\r\nmaster0:name=<\/span>mymaster,status=<\/span>ok,address=<\/span>192.168.33.10:6379,slaves=<\/span>1,sentinels=<\/span>3\r\n<\/code><\/pre>\n
      \u5e08\u5085\uff0c\u6211\u4eec\u6709\u4e00\u4e2a\u4e3b\u672c\u548c\u4e09\u4e2a\u590d\u5236\u54c1\u7684Sentinel\u3002<\/p>\n
      \u7528redis-py\u5e93\u8bbf\u95eeRedis Sentinel<\/h1>\n
      \u90a3\u4e48\uff0c\u73b0\u5728\u8ba9\u6211\u4eec\u4eceredis-py\u5c1d\u8bd5\u8bbf\u95eeRedis Sentinel\u3002\u9996\u5148\u8fdb\u884c\u5b89\u88c5\u3002<\/p>\n
      $ <\/span>pip3 install <\/span>redis\r\n<\/code><\/pre>\n
      \u8fd9\u662fredis-py\u7684\u7248\u672c\u3002<\/p>\n
      $ <\/span>pip3 freeze\r\nredis<\/span>==<\/span>3.3.8\r\n<\/code><\/pre>\n
      \u5173\u4e8e\u4eceredis-py\u5230Redis Sentinel\u7684\u8bbf\u95ee\uff0c\u53ef\u53c2\u8003\u4ee5\u4e0b\u65b9\u6848\u3002<\/p>\n
      \u54e8\u5175\u652f\u63f4<\/p>\n
      \u6211\u5c1d\u8bd5\u7f16\u5199\u4e86\u4e00\u4e2a\u547d\u4ee4\u884c\u7a0b\u5e8f\u3002<\/p>\n
      \u8f66\u8f7d\u5ba2\u6237\u7aef.py<\/p>\n
      import<\/span> re<\/span>\r\nfrom<\/span> redis.exceptions<\/span> import<\/span> ReadOnlyError<\/span>\r\nfrom<\/span> redis.sentinel<\/span> import<\/span> Sentinel<\/span>\r\nimport<\/span> sys<\/span>\r\n\r\ntry<\/span>:<\/span>\r\n    print<\/span>(<\/span>'start sentinel client'<\/span>)<\/span>\r\n\r\n    sentinels<\/span> =<\/span> [(<\/span>'192.168.33.12'<\/span>,<\/span> 26379<\/span>),<\/span> (<\/span>'192.168.33.13'<\/span>,<\/span> 26379<\/span>),<\/span> (<\/span>'192.168.33.14'<\/span>,<\/span> 26379<\/span>)]<\/span>\r\n    sentinel<\/span> =<\/span> Sentinel<\/span>(<\/span>sentinels<\/span>,<\/span> decode_responses<\/span> =<\/span> True<\/span>)<\/span>\r\n\r\n    redis<\/span> =<\/span> None<\/span>\r\n\r\n    while<\/span> True<\/span>:<\/span>\r\n        if<\/span> redis<\/span> !=<\/span> None<\/span>:<\/span>\r\n            print<\/span>(<\/span>'{}: > '<\/span>.<\/span>format<\/span>(<\/span>redis<\/span>),<\/span> end<\/span> =<\/span> ''<\/span>,<\/span> flush<\/span> =<\/span> True<\/span>)<\/span>\r\n        else<\/span>:<\/span>\r\n            print<\/span>(<\/span>'> '<\/span>,<\/span> end<\/span> =<\/span> ''<\/span>,<\/span> flush<\/span> =<\/span> True<\/span>)<\/span>\r\n\r\n        command<\/span> =<\/span> sys<\/span>.<\/span>stdin<\/span>.<\/span>readline<\/span>().<\/span>strip<\/span>()<\/span>\r\n\r\n        if<\/span> command<\/span> ==<\/span> 'info master'<\/span>:<\/span>\r\n            print<\/span>(<\/span>sentinel<\/span>.<\/span>discover_master<\/span>(<\/span>'mymaster'<\/span>))<\/span>\r\n        elif<\/span> command<\/span> ==<\/span> 'info replicas'<\/span>:<\/span>\r\n            print<\/span>(<\/span>sentinel<\/span>.<\/span>discover_slaves<\/span>(<\/span>'mymaster'<\/span>))<\/span>\r\n        elif<\/span> command<\/span> ==<\/span> 'use master'<\/span>:<\/span>\r\n            redis<\/span> =<\/span> sentinel<\/span>.<\/span>master_for<\/span>(<\/span>'mymaster'<\/span>)<\/span>\r\n        elif<\/span> command<\/span> ==<\/span> 'use replica'<\/span>:<\/span>\r\n            redis<\/span> =<\/span> sentinel<\/span>.<\/span>slave_for<\/span>(<\/span>'mymaster'<\/span>)<\/span>\r\n        elif<\/span> command<\/span> ==<\/span> 'info'<\/span>:<\/span>\r\n            print<\/span>(<\/span>str<\/span>(<\/span>redis<\/span>.<\/span>info<\/span>()))<\/span>\r\n        elif<\/span> command<\/span>.<\/span>startswith<\/span>(<\/span>'set '<\/span>):<\/span>\r\n            tokens<\/span> =<\/span> re<\/span>.<\/span>split<\/span>(<\/span>'\\s+'<\/span>,<\/span> command<\/span>)<\/span>\r\n            key<\/span> =<\/span> tokens<\/span>[<\/span>1<\/span>]<\/span>\r\n            value<\/span> =<\/span> tokens<\/span>[<\/span>2<\/span>]<\/span>\r\n\r\n            try<\/span>:<\/span>\r\n                redis<\/span>.<\/span>set<\/span>(<\/span>key<\/span>,<\/span> value<\/span>)<\/span>\r\n                print<\/span>(<\/span>'set {} = {}'<\/span>.<\/span>format<\/span>(<\/span>key<\/span>,<\/span> value<\/span>))<\/span>\r\n            except<\/span> ReadOnlyError<\/span> as<\/span> e<\/span>:<\/span>\r\n                print<\/span>(<\/span>'{}: {}'<\/span>.<\/span>format<\/span>(<\/span>e<\/span>.<\/span>__class__<\/span>.<\/span>__name__<\/span>,<\/span> e<\/span>))<\/span>\r\n\r\n        elif<\/span> command<\/span>.<\/span>startswith<\/span>(<\/span>'get '<\/span>):<\/span>\r\n            tokens<\/span> =<\/span> re<\/span>.<\/span>split<\/span>(<\/span>'\\s+'<\/span>,<\/span> command<\/span>)<\/span>\r\n            key<\/span> =<\/span> tokens<\/span>[<\/span>1<\/span>]<\/span>\r\n            print<\/span>(<\/span>'get[{}] = {}'<\/span>.<\/span>format<\/span>(<\/span>key<\/span>,<\/span> redis<\/span>.<\/span>get<\/span>(<\/span>key<\/span>)))<\/span>\r\n        elif<\/span> command<\/span>.<\/span>startswith<\/span>(<\/span>'del '<\/span>):<\/span>\r\n            tokens<\/span> =<\/span> re<\/span>.<\/span>split<\/span>(<\/span>'\\s+'<\/span>,<\/span> command<\/span>)<\/span>\r\n            key<\/span> =<\/span> tokens<\/span>[<\/span>1<\/span>]<\/span>\r\n\r\n            try<\/span>:<\/span>\r\n                redis<\/span>.<\/span>delete<\/span>(<\/span>key<\/span>)<\/span>\r\n                print<\/span>(<\/span>'del, {}'<\/span>.<\/span>format<\/span>(<\/span>key<\/span>))<\/span>\r\n            except<\/span> ReadOnlyError<\/span> as<\/span> e<\/span>:<\/span>\r\n                print<\/span>(<\/span>'{}: {}'<\/span>.<\/span>format<\/span>(<\/span>e<\/span>.<\/span>__class__<\/span>.<\/span>__name__<\/span>,<\/span> e<\/span>))<\/span>\r\n        elif<\/span> command<\/span> ==<\/span> 'exit'<\/span>:<\/span>\r\n            print<\/span>(<\/span>'bye bye!!'<\/span>)<\/span>\r\n            break<\/span>\r\n        elif<\/span> not<\/span> command<\/span>:<\/span>\r\n            pass<\/span>\r\n        else<\/span>:<\/span>\r\n            print<\/span>(<\/span>'unknown command = {}'<\/span>.<\/span>format<\/span>(<\/span>command<\/span>))<\/span>\r\n\r\nexcept<\/span> KeyboardInterrupt<\/span>:<\/span>\r\n    print<\/span>(<\/span>'bye bye!!'<\/span>)<\/span>\r\n<\/code><\/pre>\n
      \u901a\u8fc7\u4f7f\u7528\u9488\u5bf9\u6bcf\u4e2a Sentinel \u8fdb\u7a0b\u7684\u8bbf\u95ee\u5730\u5740\uff0c\u6765\u521b\u5efa Sentinel \u5b9e\u4f8b\u4ee5\u8bbf\u95ee Sentinel\u3002<\/p>\n
          sentinels<\/span> =<\/span> [(<\/span>'192.168.33.12'<\/span>,<\/span> 26379<\/span>),<\/span> (<\/span>'192.168.33.13'<\/span>,<\/span> 26379<\/span>),<\/span> (<\/span>'192.168.33.14'<\/span>,<\/span> 26379<\/span>)]<\/span>\r\n    sentinel<\/span> =<\/span> Sentinel<\/span>(<\/span>sentinels<\/span>,<\/span> decode_responses<\/span> =<\/span> True<\/span>)<\/span>\r\n<\/code><\/pre>\n
      \u8bbf\u95ee\u4e3b\u8282\u70b9\u548c\u4ece\u8282\u70b9\u53ef\u4ee5\u4f7f\u7528Sentinel#master_for\u6216Sentinel#slave_for\u8fdb\u884c\u64cd\u4f5c\u3002<\/p>\n
                  redis =<\/span> sentinel.master_for(<\/span>'mymaster'<\/span>)<\/span>\r\n\r\n            redis =<\/span> sentinel.slave_for(<\/span>'mymaster'<\/span>)<\/span>\r\n<\/code><\/pre>\n
      \u6240\u6709\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u90fd\u662fSentinelConnectionPool\u7684\u5b9e\u4f8b\u3002<\/p>\n
      \u53ea\u9700\u8981\u5bf9SentinelConnectionPool\u6267\u884cRedis\u547d\u4ee4\u5373\u53ef\u3002<\/p>\n
              elif<\/span> command<\/span>.<\/span>startswith<\/span>(<\/span>'set '<\/span>):<\/span>\r\n            tokens<\/span> =<\/span> re<\/span>.<\/span>split<\/span>(<\/span>'\\s+'<\/span>,<\/span> command<\/span>)<\/span>\r\n            key<\/span> =<\/span> tokens<\/span>[<\/span>1<\/span>]<\/span>\r\n            value<\/span> =<\/span> tokens<\/span>[<\/span>2<\/span>]<\/span>\r\n\r\n            try<\/span>:<\/span>\r\n                redis<\/span>.<\/span>set<\/span>(<\/span>key<\/span>,<\/span> value<\/span>)<\/span>\r\n                print<\/span>(<\/span>'set {} = {}'<\/span>.<\/span>format<\/span>(<\/span>key<\/span>,<\/span> value<\/span>))<\/span>\r\n            except<\/span> ReadOnlyError<\/span> as<\/span> e<\/span>:<\/span>\r\n                print<\/span>(<\/span>'{}: {}'<\/span>.<\/span>format<\/span>(<\/span>e<\/span>.<\/span>__class__<\/span>.<\/span>__name__<\/span>,<\/span> e<\/span>))<\/span>\r\n\r\n        elif<\/span> command<\/span>.<\/span>startswith<\/span>(<\/span>'get '<\/span>):<\/span>\r\n            tokens<\/span> =<\/span> re<\/span>.<\/span>split<\/span>(<\/span>'\\s+'<\/span>,<\/span> command<\/span>)<\/span>\r\n            key<\/span> =<\/span> tokens<\/span>[<\/span>1<\/span>]<\/span>\r\n            print<\/span>(<\/span>'get[{}] = {}'<\/span>.<\/span>format<\/span>(<\/span>key<\/span>,<\/span> redis<\/span>.<\/span>get<\/span>(<\/span>key<\/span>)))<\/span>\r\n        elif<\/span> command<\/span>.<\/span>startswith<\/span>(<\/span>'del '<\/span>):<\/span>\r\n            tokens<\/span> =<\/span> re<\/span>.<\/span>split<\/span>(<\/span>'\\s+'<\/span>,<\/span> command<\/span>)<\/span>\r\n            key<\/span> =<\/span> tokens<\/span>[<\/span>1<\/span>]<\/span>\r\n\r\n            try<\/span>:<\/span>\r\n                redis<\/span>.<\/span>delete<\/span>(<\/span>key<\/span>)<\/span>\r\n                print<\/span>(<\/span>'del, {}'<\/span>.<\/span>format<\/span>(<\/span>key<\/span>))<\/span>\r\n            except<\/span> ReadOnlyError<\/span> as<\/span> e<\/span>:<\/span>\r\n                print<\/span>(<\/span>'{}: {}'<\/span>.<\/span>format<\/span>(<\/span>e<\/span>.<\/span>__class__<\/span>.<\/span>__name__<\/span>,<\/span> e<\/span>))<\/span>\r\n<\/code><\/pre>\n
      \u8fd8\u6709\uff0c\u8fd8\u9700\u8981\u83b7\u53d6\u4fe1\u606f\u7684\u547d\u4ee4…\u3002<\/p>\n
              if<\/span> command<\/span> ==<\/span> 'info master'<\/span>:<\/span>\r\n            print<\/span>(<\/span>sentinel<\/span>.<\/span>discover_master<\/span>(<\/span>'mymaster'<\/span>))<\/span>\r\n        elif<\/span> command<\/span> ==<\/span> 'info replicas'<\/span>:<\/span>\r\n            print<\/span>(<\/span>sentinel<\/span>.<\/span>discover_slaves<\/span>(<\/span>'mymaster'<\/span>))<\/span>\r\n\r\n\r\n        elif<\/span> command<\/span> ==<\/span> 'info'<\/span>:<\/span>\r\n            print<\/span>(<\/span>str<\/span>(<\/span>redis<\/span>.<\/span>info<\/span>()))<\/span>\r\n<\/code><\/pre>\n
      \u53d1\u73b0\uff08Discover\uff09\u662f\u5728Sentinel\u4e0a\u4e3b\u8282\u70b9\u548c\u526f\u672c\u7684\u4fe1\u606f\u4e2d\u83b7\u53d6\u7684\uff0cinfo\u662f\u8fde\u63a5\u7684Redis\u7684\u4fe1\u606f\u3002<\/p>\n
      \u90a3\u4e48\uff0c\u6211\u5c06\u5c1d\u8bd5\u6267\u884c\u3002<\/p>\n
      $ <\/span>python3 sentinel_client.py\r\nstart sentinel client\r\n><\/span> \r\n<\/code><\/pre>\n
      \u5e08\u5085\uff0c\u590d\u5236\u54c1\u7684\u4fe1\u606f\u3002<\/p>\n
      ><\/span> info master\r\n(<\/span>'192.168.33.10'<\/span>, 6379)<\/span>\r\n><\/span> info replicas\r\n[(<\/span>'192.168.33.11'<\/span>, 6379)]<\/span>\r\n<\/code><\/pre>\n
      \u8fde\u63a5\u5230\u4e3b\u670d\u52a1\u5668\u3002<\/p>\n
      ><\/span> use master\r\n<\/code><\/pre>\n
      \u8bbe\u7f6e\u3001\u83b7\u53d6\u3002<\/p>\n
      Redis<SentinelConnectionPool<service<\/span>=<\/span>mymaster(<\/span>master)><\/span>: ><\/span> set <\/span>key1 value1\r\nset <\/span>key1 =<\/span> value1\r\nRedis<SentinelConnectionPool<service<\/span>=<\/span>mymaster(<\/span>master)><\/span>: ><\/span> get key1\r\nget[key1] =<\/span> value1\r\n<\/code><\/pre>\n
      \u91cd\u65b0\u8fde\u63a5\u5230\u526f\u672c\u5e76\u83b7\u53d6\u6570\u636e\u3002<\/p>\n
      Redis<SentinelConnectionPool<service<\/span>=<\/span>mymaster(<\/span>master)><\/span>: ><\/span> use replica\r\nRedis<SentinelConnectionPool<service<\/span>=<\/span>mymaster(<\/span>slave)><\/span>: ><\/span> get key1\r\nget[key1] =<\/span> value1\r\n<\/code><\/pre>\n
      \u5728\u590d\u5236\u54c1\u4e00\u4fa7\uff0c\u65e0\u6cd5\u66f4\u65b0\u6570\u636e\u3002<\/p>\n
      Redis<SentinelConnectionPool<service<\/span>=<\/span>mymaster(<\/span>slave)><\/span>: ><\/span> set <\/span>key2 value2\r\nReadOnlyError: You can't write against a read only replica.\r\n<\/span><\/code><\/pre>\n
      \u5728\u8fd9\u91cc\u91cd\u65b0\u8fde\u63a5\u5230\u4e3b\u673a\u3002<\/p>\n
      Redis<SentinelConnectionPool<service<\/span>=<\/span>mymaster(<\/span>slave)><\/span>: ><\/span> use master\r\n<\/code><\/pre>\n
      \u6211\u5c1d\u8bd5\u505c\u6b62\u4e3b\u8282\u70b9\u4e0a\u7684Redis\u3002<\/p>\n
      $ <\/span>sudo <\/span>systemctl stop redis\r\n<\/code><\/pre>\n
      \u4f7f\u7528redis-cli\u547d\u4ee4\uff0c\u786e\u8ba4\u4e3b\u670d\u52a1\u5668\u5df2\u7ecf\u5207\u6362\u3002<\/p>\n
      $ <\/span>redis-cli -h<\/span> 192.168.33.12 -p<\/span> 26379\r\n192.168.33.12:26379> info sentinel\r\n# Sentinel<\/span>\r\nsentinel_masters:1\r\nsentinel_tilt:0\r\nsentinel_running_scripts:0\r\nsentinel_scripts_queue_length:0\r\nsentinel_simulate_failure_flags:0\r\nmaster0:name=<\/span>mymaster,status=<\/span>ok,address=<\/span>192.168.33.11:6379,slaves=<\/span>1,sentinels=<\/span>3\r\n<\/code><\/pre>\n
      \u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6211\u5c06\u5c1d\u8bd5\u4ece\u4e4b\u524d\u7684\u4e3b\u63a7\u53f0\u547d\u4ee4\u4e2d\u83b7\u53d6\u6570\u636e\u3002<\/p>\n
      Redis<SentinelConnectionPool<service<\/span>=<\/span>mymaster(<\/span>master)><\/span>: ><\/span> get key1\r\nget[key1] =<\/span> value1\r\n<\/code><\/pre>\n
      \u6709\u4e9b\u52a8\u9759\u4e86\u2026\u3002<\/p>\n
      \u8ba9\u6211\u770b\u4e00\u4e0b\u8fd9\u4e2aRedis\u7684\u4fe1\u606f\u3002<\/p>\n
      Redis<SentinelConnectionPool<service<\/span>=<\/span>mymaster(<\/span>master)><\/span>: ><\/span> info\r\n{<\/span>'redis_version'<\/span>: '5.0.6'<\/span>, 'redis_git_sha1'<\/span>: 0, 'redis_git_dirty'<\/span>: 0, 'redis_build_id'<\/span>: 'c3d7ebb6b1a2844b'<\/span>, 'redis_mode'<\/span>: 'standalone'<\/span>, 'os'<\/span>: 'Linux 3.10.0-957.12.2.el7.x86_64 x86_64'<\/span>, 'arch_bits'<\/span>: 64, 'multiplexing_api'<\/span>: 'epoll'<\/span>, 'atomicvar_api'<\/span>: 'atomic-builtin'<\/span>, 'gcc_version'<\/span>: '4.8.5'<\/span>, 'process_id'<\/span>: 24544, 'run_id'<\/span>: 'ad1e763f073c8fcce092a773f2bbd2c5933d2bf9'<\/span>, 'tcp_port'<\/span>: 6379, 'uptime_in_seconds'<\/span>: 440050, 'uptime_in_days'<\/span>: 5, 'hz'<\/span>: 10, 'configured_hz'<\/span>: 10, 'lru_clock'<\/span>: 9707634, 'executable'<\/span>: '\/usr\/bin\/redis-server'<\/span>, 'config_file'<\/span>: '\/etc\/redis.conf'<\/span>, 'connected_clients'<\/span>: 7, 'client_recent_max_input_buffer'<\/span>: 2, 'client_recent_max_output_buffer'<\/span>: 0, 'blocked_clients'<\/span>: 0, 'used_memory'<\/span>: 2070088, 'used_memory_human'<\/span>: '1.97M'<\/span>, 'used_memory_rss'<\/span>: 4554752, 'used_memory_rss_human'<\/span>: '4.34M'<\/span>, 'used_memory_peak'<\/span>: 2173256, 'used_memory_peak_human'<\/span>: '2.07M'<\/span>, 'used_memory_peak_perc'<\/span>: '95.25%'<\/span>, 'used_memory_overhead'<\/span>: 2024062, 'used_memory_startup'<\/span>: 791416, 'used_memory_dataset'<\/span>: 46026, 'used_memory_dataset_perc'<\/span>: '3.60%'<\/span>, 'allocator_allocated'<\/span>: 2637720, 'allocator_active'<\/span>: 3035136, 'allocator_resident'<\/span>: 7573504, 'total_system_memory'<\/span>: 510861312, 'total_system_memory_human'<\/span>: '487.20M'<\/span>, 'used_memory_lua'<\/span>: 37888, 'used_memory_lua_human'<\/span>: '37.00K'<\/span>, 'used_memory_scripts'<\/span>: 0, 'used_memory_scripts_human'<\/span>: '0B'<\/span>, 'number_of_cached_scripts'<\/span>: 0, 'maxmemory'<\/span>: 0, 'maxmemory_human'<\/span>: '0B'<\/span>, 'maxmemory_policy'<\/span>: 'noeviction'<\/span>, 'allocator_frag_ratio'<\/span>: 1.15, 'allocator_frag_bytes'<\/span>: 397416, 'allocator_rss_ratio'<\/span>: 2.5, 'allocator_rss_bytes'<\/span>: 4538368, 'rss_overhead_ratio'<\/span>: 0.6, 'rss_overhead_bytes'<\/span>: -3018752<\/span>, 'mem_fragmentation_ratio'<\/span>: 2.25, 'mem_fragmentation_bytes'<\/span>: 2526672, 'mem_not_counted_for_evict'<\/span>: 0, 'mem_replication_backlog'<\/span>: 1048576, 'mem_clients_slaves'<\/span>: 0, 'mem_clients_normal'<\/span>: 183998, 'mem_aof_buffer'<\/span>: 0, 'mem_allocator'<\/span>: 'jemalloc-5.1.0'<\/span>, 'active_defrag_running'<\/span>: 0, 'lazyfree_pending_objects'<\/span>: 0, 'loading'<\/span>: 0, 'rdb_changes_since_last_save'<\/span>: 0, 'rdb_bgsave_in_progress'<\/span>: 0, 'rdb_last_save_time'<\/span>: 1569988537, 'rdb_last_bgsave_status'<\/span>: 'ok'<\/span>, 'rdb_last_bgsave_time_sec'<\/span>: 0, 'rdb_current_bgsave_time_sec'<\/span>: -1<\/span>, 'rdb_last_cow_size'<\/span>: 221184, 'aof_enabled'<\/span>: 0, 'aof_rewrite_in_progress'<\/span>: 0, 'aof_rewrite_scheduled'<\/span>: 0, 'aof_last_rewrite_time_sec'<\/span>: -1<\/span>, 'aof_current_rewrite_time_sec'<\/span>: -1<\/span>, 'aof_last_bgrewrite_status'<\/span>: 'ok'<\/span>, 'aof_last_write_status'<\/span>: 'ok'<\/span>, 'aof_last_cow_size'<\/span>: 0, 'total_connections_received'<\/span>: 26, 'total_commands_processed'<\/span>: 2737329, 'instantaneous_ops_per_sec'<\/span>: 3, 'total_net_input_bytes'<\/span>: 202595677, 'total_net_output_bytes'<\/span>: 1041974292, 'instantaneous_input_kbps'<\/span>: 0.2, 'instantaneous_output_kbps'<\/span>: 0.54, 'rejected_connections'<\/span>: 0, 'sync_full'<\/span>: 0, 'sync_partial_ok'<\/span>: 0, 'sync_partial_err'<\/span>: 0, 'expired_keys'<\/span>: 0, 'expired_stale_perc'<\/span>: 0.0, 'expired_time_cap_reached_count'<\/span>: 0, 'evicted_keys'<\/span>: 0, 'keyspace_hits'<\/span>: 3, 'keyspace_misses'<\/span>: 2, 'pubsub_channels'<\/span>: 1, 'pubsub_patterns'<\/span>: 0, 'latest_fork_usec'<\/span>: 277, 'migrate_cached_sockets'<\/span>: 0, 'slave_expires_tracked_keys'<\/span>: 0, 'active_defrag_hits'<\/span>: 0, 'active_defrag_misses'<\/span>: 0, 'active_defrag_key_hits'<\/span>: 0, 'active_defrag_key_misses'<\/span>: 0, 'role'<\/span>: 'master'<\/span>, 'connected_slaves'<\/span>: 0, 'master_replid'<\/span>: '56d4bc022b7a089800bfe723201c821f570f2fe4'<\/span>, 'master_replid2'<\/span>: '54810ab6453ffdf12f21ff34157e2e0d655f8a81'<\/span>, 'master_repl_offset'<\/span>: 91797500, 'second_repl_offset'<\/span>: 91786762, 'repl_backlog_active'<\/span>: 1, 'repl_backlog_size'<\/span>: 1048576, 'repl_backlog_first_byte_offset'<\/span>: 90748925, 'repl_backlog_histlen'<\/span>: 1048576, 'used_cpu_sys'<\/span>: 1280.370212, 'used_cpu_user'<\/span>: 41.081586, 'used_cpu_sys_children'<\/span>: 0.004907, 'used_cpu_user_children'<\/span>: 0.0, 'cluster_enabled'<\/span>: 0, 'db0'<\/span>: {<\/span>'keys'<\/span>: 1, 'expires'<\/span>: 0, 'avg_ttl'<\/span>: 0}}<\/span>\r\n<\/code><\/pre>\n
      \u542c\u8bf4\u6ca1\u6709\u590d\u5236\u54c1\u4e86\u5462\u3002<\/p>\n
      'connected_slaves'<\/span>:<\/span> 0<\/span>\r\n<\/code><\/pre>\n
      \u90a3\u4e48\u53ef\u4ee5\u8fd9\u6837\u8bf4\uff0c\u5f53\u524d\u8fde\u63a5\u7684\u662f\u8fdb\u884c\u4e86\u6545\u969c\u8f6c\u79fb\u7684\u526f\u672c\u3002<\/p>\n
      \u5728\u6b64\u72b6\u6001\u4e0b\uff0c\u5f53\u8fde\u63a5\u5230\u590d\u5236\u54c1\u5e76\u5c1d\u8bd5\u83b7\u53d6\u6570\u636e\u65f6\uff0c\u5b83\u5c45\u7136\u80fd\u591f\u6b63\u5e38\u8fd0\u884c\u3002<\/p>\n
      Redis<SentinelConnectionPool<service<\/span>=<\/span>mymaster(<\/span>master)><\/span>: ><\/span> use replica\r\nRedis<SentinelConnectionPool<service<\/span>=<\/span>mymaster(<\/span>slave)><\/span>: ><\/span> get key1\r\nget[key1] =<\/span> value1\r\n<\/code><\/pre>\n
      \u5f53\u6211\u5728discover\u4e0a\u770b\u5230\u65f6\uff0c\u60c5\u51b5\u662f\u8fd9\u6837\u7684\u3002<\/p>\n
      Redis<SentinelConnectionPool<service<\/span>=<\/span>mymaster(<\/span>slave)><\/span>: ><\/span> info master\r\n(<\/span>'192.168.33.11'<\/span>, 6379)<\/span>\r\nRedis<SentinelConnectionPool<service<\/span>=<\/span>mymaster(<\/span>slave)><\/span>: ><\/span> info replicas\r\n[]<\/span>\r\n<\/code><\/pre>\n
      \u90a3\u4e48\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5373\u4f7f\u8fde\u63a5\u5230\u590d\u5236\u54c1\uff0c\u7531\u4e8e\u6ca1\u6709\u5408\u9002\u7684\u590d\u5236\u54c1\u53ef\u8fde\u63a5\uff0c\u5c06\u4f1a\u8fde\u63a5\u5230\u4e3b\u670d\u52a1\u5668\u3002<\/p>\n
      \u5b9e\u9645\u4e0a\uff0c\u4e5f\u53ef\u4ee5\u8fdb\u884c\u66f4\u65b0\u3002<\/p>\n
      Redis<SentinelConnectionPool<service<\/span>=<\/span>mymaster(<\/span>slave)><\/span>: ><\/span> use replica\r\nRedis<SentinelConnectionPool<service<\/span>=<\/span>mymaster(<\/span>slave)><\/span>: ><\/span> set <\/span>key2 value2\r\nset <\/span>key2 =<\/span> value2\r\n<\/code><\/pre>\n
      \u6240\u4ee5\uff0c\u5982\u679c\u5728\u4f7f\u7528\u4e3b\u673a\u65f6\u8fde\u63a5\u65ad\u5f00\u4e86\uff0c\u90a3\u4e48\u5b83\u4f1a\u8f6c\u79fb\u5230\u5907\u4efd\u4e2d\u7684\u65e7\u526f\u672c\u5e76\u4e0e\u4e4b\u8fde\u63a5\uff08\u5728 Sentinel \u68c0\u6d4b\u5230\u4e4b\u524d\u7684\u884c\u4e3a\u6211\u4eec\u6682\u65f6\u4e0d\u8003\u8651\uff09\u3002<\/p>\n
      \u603b\u7684\u6765\u8bf4\uff0c\u884c\u4e3a\u6a21\u5f0f\u6211\u5927\u81f4\u6709\u70b9\u660e\u767d\u4e86\u3002<\/p>\n
      \u9644\u5f55\uff1a\u6765\u81eaEPEL\u5b89\u88c5\u7684Redis\u548cRedis Sentinel\u7684\u9ed8\u8ba4\u503c<\/h1>\n
      EPEL\u5b89\u88c5\u7684\u9ed8\u8ba4\u503c\u4e3a\/etc\/redis.conf\u3002<\/p>\n
      $ <\/span>sudo grep<\/span> -v<\/span> '#'<\/span> \/etc\/redis.conf | grep<\/span> -v<\/span> '^$'<\/span>\r\nbind <\/span>127.0.0.1\r\nprotected-mode yes\r\n<\/span>port 6379\r\ntcp-backlog 511\r\ntimeout <\/span>0\r\ntcp-keepalive 300\r\ndaemonize no\r\nsupervised no\r\npidfile \/var\/run\/redis_6379.pid\r\nloglevel notice\r\nlogfile \/var\/log\/redis\/redis.log\r\ndatabases 16\r\nalways-show-logo yes\r\n<\/span>save 900 1\r\nsave 300 10\r\nsave 60 10000\r\nstop-writes-on-bgsave-error yes\r\n<\/span>rdbcompression yes\r\n<\/span>rdbchecksum yes\r\n<\/span>dbfilename dump.rdb\r\ndir<\/span> \/var\/lib\/redis\r\nreplica-serve-stale-data yes\r\n<\/span>replica-read-only yes\r\n<\/span>repl-diskless-sync no\r\nrepl-diskless-sync-delay 5\r\nrepl-disable-tcp-nodelay no\r\nreplica-priority 100\r\nlazyfree-lazy-eviction no\r\nlazyfree-lazy-expire no\r\nlazyfree-lazy-server-del no\r\nreplica-lazy-flush no\r\nappendonly no\r\nappendfilename \"appendonly.aof\"<\/span>\r\nappendfsync everysec\r\nno-appendfsync-on-rewrite no\r\nauto-aof-rewrite-percentage 100\r\nauto-aof-rewrite-min-size 64mb\r\naof-load-truncated yes\r\n<\/span>aof-use-rdb-preamble yes\r\n<\/span>lua-time-limit 5000\r\nslowlog-log-slower-than 10000\r\nslowlog-max-len 128\r\nlatency-monitor-threshold 0\r\nnotify-keyspace-events \"\"<\/span>\r\nhash-max-ziplist-entries 512\r\nhash-max-ziplist-value 64\r\nlist-max-ziplist-size -2<\/span>\r\nlist-compress-depth 0\r\nset-max-intset-entries 512\r\nzset-max-ziplist-entries 128\r\nzset-max-ziplist-value 64\r\nhll-sparse-max-bytes 3000\r\nstream-node-max-bytes 4096\r\nstream-node-max-entries 100\r\nactiverehashing yes\r\n<\/span>client-output-buffer-limit normal 0 0 0\r\nclient-output-buffer-limit replica 256mb 64mb 60\r\nclient-output-buffer-limit pubsub 32mb 8mb 60\r\nhz 10\r\ndynamic-hz yes\r\n<\/span>aof-rewrite-incremental-fsync yes\r\n<\/span>rdb-save-incremental-fsync yes<\/span>\r\n<\/code><\/pre>\n
      EPEL\u5b89\u88c5\u540e\u7684\u9ed8\u8ba4\u914d\u7f6e\u6587\u4ef6\/etc\/redis-sentinel.conf\u3002<\/p>\n
      $ <\/span>sudo grep<\/span> -v<\/span> '#'<\/span> \/etc\/redis-sentinel.conf | grep<\/span> -v<\/span> '^$'<\/span>\r\nport 26379\r\ndaemonize no\r\npidfile \"\/var\/run\/redis-sentinel.pid\"<\/span>\r\nlogfile \"\/var\/log\/redis\/sentinel.log\"<\/span>\r\ndir<\/span> \"\/tmp\"<\/span>\r\nsentinel myid 88cdee281108c92337965c782f60653f4f5d00fe\r\nsentinel deny-scripts-reconfig yes\r\n<\/span>sentinel monitor mymaster 127.0.0.1 6379 2\r\nsentinel config-epoch mymaster 0\r\nsentinel leader-epoch mymaster 0\r\nprotected-mode no\r\nsupervised systemd\r\nsentinel known-replica mymaster 192.168.33.11 6379\r\nsentinel known-sentinel mymaster 192.168.33.14 26379 4cdd5e38eccc965513db0d8be46b9eb6614418da\r\nsentinel known-sentinel mymaster 192.168.33.13 26379 22249d49a0b530709b7897cbbb88a2db6da6a1b1\r\nsentinel current-epoch 0\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
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