我正在按照本教程(https://github.com/drginm/docker-boilerplates/tree/master/mongodb-replicaset)进行操作，以便获得三个实例的mongodb复制集以在docker-compose中工作。
以下是我到目前为止采取的步骤：
1) 我已将setup和mongo-rs0-1文件夹复制到我的根目录中。
2)我已经将三个mongo实例和安装实例添加到我的docker-compose文件中。它现在看起来像这样：
version: '3'
services:
mongo-rs0-1:
image: "mongo-start"
build: ./mongo-rs0-1
ports:
- "27017:27017"
volumes:
- ./mongo-rs0-1/data:/data/db
networks:
- app-network
depends_on:
- "mongo-rs0-2"
- "mongo-rs0-3"
mongo-rs0-2:
image: "mongo"
command: --replSet rs0 --smallfiles --oplogSize 128
networks:
- app-network
ports:
- "27018:27017"
volumes:
- ./mongo-rs0-2/data:/data/db
mongo-rs0-3:
image: "mongo"
command: --replSet rs0 --smallfiles --oplogSize 128
networks:
- app-network
ports:
- "27019:27017"
volumes:
- ./mongo-rs0-3/data:/data/db
setup-rs:
image: "setup-rs"
build: ./setup
networks:
- app-network
depends_on:
- "mongo-rs0-1"
nodejs:
build:
context: .
dockerfile: Dockerfile
ports:
- "8000:8000"
container_name: nodejs
restart: unless-stopped
networks:
- app-network
depends_on:
- setup-rs
nextjs:
build:
context: ../.
dockerfile: Dockerfile
ports:
- "3000:3000"
container_name: nextjs
restart: unless-stopped
networks:
- app-network
depends_on:
- nodejs
webserver:
image: nginx:mainline-alpine
container_name: webserver
restart: unless-stopped
ports:
- "80:80"
volumes:
- ./picFolder:/picFolder
- web-root:/var/www/html
- ./nginx-conf:/etc/nginx/conf.d
- certbot-etc:/etc/letsencrypt
- certbot-var:/var/lib/letsencrypt
depends_on:
- nodejs
- nextjs
- setup-rs
networks:
- app-network
volumes:
certbot-etc:
certbot-var:
web-root:
driver: local
driver_opts:
type: none
device: /
o: bind
networks:
app-network:
driver: bridge
3)这不需要修改我的nginx.conf文件，但我在这里添加了它以节省开支：
server {
listen 80;
listen [::]:80;
add_header 'Access-Control-Allow-Origin' '*';
add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS' always;
root /var/www/html;
index index.html index.htm index.nginx-debian.html;
server_name example.com www.example.com localhost;
location /socket.io {
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "Upgrade";
proxy_set_header Host $host;
proxy_pass http://nodejs:8000/socket.io/;
}
location /back {
proxy_connect_timeout 75s;
proxy_read_timeout 75s;
proxy_send_timeout 75s;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection 'upgrade';
proxy_set_header Host $host;
proxy_cache_bypass $http_upgrade;
proxy_pass http://nodejs:8000/back/;
}
location /staticBack{
alias /picFolder;
expires 1y;
access_log off;
add_header Cache-Control "public";
}
location / {
proxy_pass http://nextjs:3000;
}
location ~ /.well-known/acme-challenge {
allow all;
root /var/www/html;
}
}
4)最后，我将连接字符串更改为'mongodb://mongo-rs0-1,mongo-rs0-2,mongo-rs0-3/test'，如下所示(https://github.com/drginm/docker-boilerplates/blob/master/mongodb-replicaset/web-site/database.js)
这一切似乎都是正确的，但是我的nodejs在尝试连接到猫鼬时会抛出以下错误
mongoose.connect("mongodb://mongo-rs0-1,mongo-rs0-2,mongo-rs0-3/test");
MongoDB connection error: { MongoError: no mongos proxy available
at Timeout.<anonymous> (/var/www/back/node_modules/mongodb-core/lib/topologies/mongos.js:757:28)
at ontimeout (timers.js:498:11)
at tryOnTimeout (timers.js:323:5)
at Timer.listOnTimeout (timers.js:290:5) name: 'MongoError', [Symbol(mongoErrorContextSymbol)]: {} }
有人看到发生了什么吗？我尝试搜索此问题，但看起来通用答案是 mongodb 只是不知何故没有"看到"实例。我有点迷茫，任何帮助将不胜感激。
编辑：
经过一番挖掘，我找到了这个SO(猫鼬与副本集的连接)，发现mongo.conf文件(https://github.com/drginm/docker-boilerplates/blob/master/mongodb-replicaset/mongo-rs0-1/mongo.conf)似乎说副本集名称是rs0。所以现在我连接：
mongoose.connect("mongodb://mongo-rs0-1,mongo-rs0-2,mongo-rs0-3/test?replicaSet=rs0");
但是，我仍然收到以下错误(至少不同！
MongoDB connection error: { MongoError: no primary found in replicaset or invalid replica set name
at /var/www/back/node_modules/mongodb-core/lib/topologies/replset.js:636:11
at Server.<anonymous> (/var/www/back/node_modules/mongodb-core/lib/topologies/replset.js:357:9)
at Object.onceWrapper (events.js:315:30)
at emitOne (events.js:116:13)
at Server.emit (events.js:211:7)
at /var/www/back/node_modules/mongodb-core/lib/topologies/server.js:508:16
at /var/www/back/node_modules/mongodb-core/lib/connection/pool.js:532:18
at _combinedTickCallback (internal/process/next_tick.js:132:7)
at process._tickCallback (internal/process/next_tick.js:181:9) name: 'MongoError', [Symbol(mongoErrorContextSymbol)]: {} }
我很确定副本集名称现在是正确的，但我想也许我必须指定哪个是主要的？然而，这个SO(https://dba.stackexchange.com/questions/136621/how-to-set-a-mongodb-node-to-return-as-the-primary-of-a-replication-set)似乎暗示这应该自动发生。任何帮助仍然不胜感激。
编辑编辑：
进一步的研究发现了这个SO帖子(猫鼬与副本集的连接)。鉴于较新的v5 mongodb，以下选项连接现在似乎是最好的选择：
var options = {
native_parser: true,
auto_reconnect: false,
poolSize: 10,
connectWithNoPrimary: true,
sslValidate: false,
socketOptions: {
keepAlive: 1000,
connectTimeoutMS: 30000
}
};
mongoose.connect("mongodb://mongo-rs0-1:27017,mongo-rs0-2:27017,mongo-rs0-3:27017/test?replicaSet=rs0", options);
connectWithNoPrimary: true似乎特别重要，因为如果nodejs与从Docker启动的mongo服务存在竞争条件，它们可能还没有选择主节点。
但是，我仍然收到以下错误(再次，微妙的不同)：
MongoDB connection error: { MongoError: no secondary found in replicaset or invalid replica set name
at /var/www/back/node_modules/mongodb-core/lib/topologies/replset.js:649:11
at Server.<anonymous> (/var/www/back/node_modules/mongodb-core/lib/topologies/replset.js:357:9)
at Object.onceWrapper (events.js:315:30)
at emitOne (events.js:116:13)
at Server.emit (events.js:211:7)
at /var/www/back/node_modules/mongodb-core/lib/topologies/server.js:508:16
at /var/www/back/node_modules/mongodb-core/lib/connection/pool.js:532:18
at _combinedTickCallback (internal/process/next_tick.js:132:7)
at process._tickCallback (internal/process/next_tick.js:181:9) name: 'MongoError', [Symbol(mongoErrorContextSymbol)]: {} }
所以现在它找不到辅助副本集。添加connectwithnosecondary不会执行任何操作并导致相同的错误 - 我认为这不是一个有效的选项。仍然卡住，任何帮助将不胜感激。
编辑：
我已经将我的 nodejs 连接函数更改为存在于错误时的回归回调中。我希望这只会继续尝试连接，直到 docker-compose 中的任何潜在竞争条件得到解决并且我可以成功连接。但是，我一直收到上述错误MongoError: no secondary found in replicaset or invalid replica set name.所以我不再认为问题是连接的竞争条件 - 至少这似乎不是当前的错误。
var options = {
native_parser: true,
auto_reconnect: false,
poolSize: 10,
connectWithNoPrimary: true,
sslValidate: false
};
// mongoose.connect("mongodb://mongo-rs0-1,mongo-rs0-2,mongo-rs0-3/?replicaSet=rs0", { useNewUrlParser: true, connectWithNoPrimary: true });
const connectFunc = () => {
mongoose.connect("mongodb://mongo-rs0-1:27017,mongo-rs0-2:27017,mongo-rs0-3:27017/test?replicaSet=rs0", options);
mongoose.Promise = global.Promise;
var db = mongoose.connection;
db.on('error', (error)=>{
console.log('MongoDB connection error:', error)
console.log('now calling connectFunc() again');
connectFunc()
});
db.once('open', function() {
// we're connected!
console.log('connected to mongoose db')
});
}
connectFunc()
编辑 x4：
这是另一个示例教程，我遇到了相同的错误：https://gist.github.com/patientplatypus/e48e6efdcc9f0f1aa551cc8342d0f2f3。我现在半信半疑地认为这可能是自动/猫鼬的错误，所以我打开了一个错误报告，可以在这里查看：https://github.com/Automattic/mongoose/issues/7705。这可能与2016年提出的这个长期存在的问题有关：https://github.com/Automattic/mongoose/issues/4596。
编辑 x5：
下面是其中一个 mongo 容器的日志输出：
patientplatypus:~/Documents/patientplatypus.com/forum/back:19:47:11$docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
d46cfb5e1927 nginx:mainline-alpine "nginx -g 'daemon of…" 3 minutes ago Up 3 minutes 0.0.0.0:80->80/tcp webserver
6798fe1f6093 back_nextjs "npm start" 3 minutes ago Up 3 minutes 0.0.0.0:3000->3000/tcp nextjs
ab6888f703c7 back_nodejs "/docker-entrypoint.…" 3 minutes ago Up 3 minutes 0.0.0.0:8000->8000/tcp nodejs
48131a82b34e mongo-start "docker-entrypoint.s…" 3 minutes ago Up 3 minutes 0.0.0.0:27017->27017/tcp mongo1
312772b1b0f1 mongo "docker-entrypoint.s…" 3 minutes ago Up 3 minutes 0.0.0.0:27019->27017/tcp mongo3
9fe9a16eb20e mongo "docker-entrypoint.s…" 3 minutes ago Up 3 minutes 0.0.0.0:27018->27017/tcp mongo2
patientplatypus:~/Documents/patientplatypus.com/forum/back:19:48:55$docker logs 9fe9a16eb20e
2019-04-12T00:45:29.689+0000 I CONTROL [main] Automatically disabling TLS 1.0, to force-enable TLS 1.0 specify --sslDisabledProtocols 'none'
2019-04-12T00:45:29.727+0000 I CONTROL [initandlisten] MongoDB starting : pid=1 port=27017 dbpath=/data/db 64-bit host=9fe9a16eb20e
2019-04-12T00:45:29.728+0000 I CONTROL [initandlisten] db version v4.0.8
2019-04-12T00:45:29.728+0000 I CONTROL [initandlisten] git version: 9b00696ed75f65e1ebc8d635593bed79b290cfbb
2019-04-12T00:45:29.728+0000 I CONTROL [initandlisten] OpenSSL version: OpenSSL 1.0.2g 1 Mar 2016
2019-04-12T00:45:29.728+0000 I CONTROL [initandlisten] allocator: tcmalloc
2019-04-12T00:45:29.728+0000 I CONTROL [initandlisten] modules: none
2019-04-12T00:45:29.729+0000 I CONTROL [initandlisten] build environment:
2019-04-12T00:45:29.729+0000 I CONTROL [initandlisten] distmod: ubuntu1604
2019-04-12T00:45:29.729+0000 I CONTROL [initandlisten] distarch: x86_64
2019-04-12T00:45:29.729+0000 I CONTROL [initandlisten] target_arch: x86_64
2019-04-12T00:45:29.729+0000 I CONTROL [initandlisten] options: { net: { bindIpAll: true }, replication: { oplogSizeMB: 128, replSet: "rs" }, storage: { mmapv1: { smallFiles: true } } }
2019-04-12T00:45:29.734+0000 W STORAGE [initandlisten] Detected unclean shutdown - /data/db/mongod.lock is not empty.
2019-04-12T00:45:29.738+0000 I STORAGE [initandlisten] Detected data files in /data/db created by the 'wiredTiger' storage engine, so setting the active storage engine to 'wiredTiger'.
2019-04-12T00:45:29.741+0000 W STORAGE [initandlisten] Recovering data from the last clean checkpoint.
2019-04-12T00:45:29.742+0000 I STORAGE [initandlisten] wiredtiger_open config: create,cache_size=1461M,session_max=20000,eviction=(threads_min=4,threads_max=4),config_base=false,statistics=(fast),log=(enabled=true,archive=true,path=journal,compressor=snappy),file_manager=(close_idle_time=100000),statistics_log=(wait=0),verbose=(recovery_progress),
2019-04-12T00:45:43.165+0000 I STORAGE [initandlisten] WiredTiger message [1555029943:165420][1:0x7f7051ca9a40], txn-recover: Main recovery loop: starting at 7/4608 to 8/256
2019-04-12T00:45:43.214+0000 I STORAGE [initandlisten] WiredTiger message [1555029943:214706][1:0x7f7051ca9a40], txn-recover: Recovering log 7 through 8
2019-04-12T00:45:43.787+0000 I STORAGE [initandlisten] WiredTiger message [1555029943:787329][1:0x7f7051ca9a40], txn-recover: Recovering log 8 through 8
2019-04-12T00:45:43.849+0000 I STORAGE [initandlisten] WiredTiger message [1555029943:849811][1:0x7f7051ca9a40], txn-recover: Set global recovery timestamp: 0
2019-04-12T00:45:43.892+0000 I RECOVERY [initandlisten] WiredTiger recoveryTimestamp. Ts: Timestamp(0, 0)
2019-04-12T00:45:43.972+0000 W STORAGE [initandlisten] Detected configuration for non-active storage engine mmapv1 when current storage engine is wiredTiger
2019-04-12T00:45:43.972+0000 I CONTROL [initandlisten]
2019-04-12T00:45:43.972+0000 I CONTROL [initandlisten] ** WARNING: Access control is not enabled for the database.
2019-04-12T00:45:43.972+0000 I CONTROL [initandlisten] ** Read and write access to data and configuration is unrestricted.
2019-04-12T00:45:43.973+0000 I CONTROL [initandlisten]
2019-04-12T00:45:44.035+0000 I FTDC [initandlisten] Initializing full-time diagnostic data capture with directory '/data/db/diagnostic.data'
2019-04-12T00:45:44.054+0000 I REPL [initandlisten] Did not find local voted for document at startup.
2019-04-12T00:45:44.064+0000 I REPL [initandlisten] Rollback ID is 1
2019-04-12T00:45:44.064+0000 I REPL [initandlisten] Did not find local replica set configuration document at startup; NoMatchingDocument: Did not find replica set configuration document in local.system.replset
2019-04-12T00:45:44.065+0000 I CONTROL [LogicalSessionCacheRefresh] Sessions collection is not set up; waiting until next sessions refresh interval: Replication has not yet been configured
2019-04-12T00:45:44.065+0000 I NETWORK [initandlisten] waiting for connections on port 27017
2019-04-12T00:45:44.069+0000 I CONTROL [LogicalSessionCacheReap] Sessions collection is not set up; waiting until next sessions reap interval: config.system.sessions does not exist
2019-04-12T00:45:45.080+0000 I FTDC [ftdc] Unclean full-time diagnostic data capture shutdown detected, found interim file, some metrics may have been lost. OK
特别是这条线
Did not find local replica set configuration document at startup; NoMatchingDocument: Did not find replica set configuration document in local.system.replset
看起来令人担忧，我必须继续调查它。如果有人看到任何东西，请告诉我。
编辑x6
所以我 docker exec'd to one mongo 副本并输出 rs.status()。 我使用了docker exec -it mongo1 mongo然后rs.status()并得到了以下输出：
{
"operationTime" : Timestamp(0, 0),
"ok" : 0,
"errmsg" : "no replset config has been received",
"code" : 94,
"codeName" : "NotYetInitialized",
"$clusterTime" : {
"clusterTime" : Timestamp(0, 0),
"signature" : {
"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
"keyId" : NumberLong(0)
}
}
}
这似乎与上面的 mongodb 副本日志中的错误非常相似 (2019-04-12T00:45:44.064+0000 I REPL [initandlisten] Did not find local replica set configuration document at startup; NoMatchingDocument: Did not find replica set configuration document in local.system.replset)。有谁知道它认为缺少什么？
您需要初始化副本集才能访问它。否则，应用程序将无法连接到本地实例。
理想情况下，您需要在副本集配置(setup-rs步骤)和下一个步骤之间添加一些时间，因为副本集配置可能需要比应用程序启动时间更长的时间。
或者修复脚本，如果脚本本身有问题。
您可能正在使用副本集，因此应调整连接字符串。 尝试在连接字符串的末尾添加参数replicaSet=rs0所以对于EX。
mongodb://<usr>:<pass>@<host1>:<port1>,<host2>:<port2>/<database_name>?replicaSet=rs0<&otherParams>
我也有类似的问题。我经常收到"MongoError：没有可用的mongos代理"错误。最后我设法以这种方式解决了它：
// The mongoose connection options
let options = {
ssl: true,
sslValidate: true,
poolSize: 1,
reconnectTries: 1,
useNewUrlParser: true,
dbName: 'myDb' // Specify the database here
}
我的连接字符串如下所示：
mongodb://<usr>:<pass>@host1.com:12345,host2.com:12346/adminDb?authSource=admin&ssl=true
我将默认的管理员数据库保留在连接字符串中，而是在选项中定义了要连接到的数据库。这解决了问题。
尝试使用Node.js 0.10/mongodb 2.2.36连接到副本集时出现此错误。该错误是由需要TLS 1.2的代理引起的。
要解决此问题，请将Node.js运行时升级到0.12或更高版本。