Store session in koa on multiple servers

Question

I have several koa servers with load balancer using passport login. I would like to keep the session on all servers.

My first attempt was to install the session store in the mysql database, but this caused the server to call mysql for each query, which caused performance problems.

I would like to save the session object in the RAM of each server, and if the user is redirected to another server using load balancing, and the server does not recognize the cookie, I would like it to step back to the database and load the data into its RAM too.
Is there any way to do this?

Thank.

Answer 1

, , redis, memcached mongodb. , , koa . redis, lib example.

Answer 2

, " " (. Session persistence), , IP- . , !

Answer 3

koa-session https://github.com/koajs/session.

http://www.zev23.com/2014/03/koajs-tutorial-authenticate-with_7.html

app.js, .

"use strict"

const
  Router = require('koa-router'),
  passport = require('./auth'),
  session = require('koa-sess'),
  redisStore = require('koa-redis'),
  koa = require('koa'),
  app = koa();

//Middleware: request logger
function *reqlogger(next){
  console.log('%s - %s %s',new Date().toISOString(), this.req.method, this.req.url);
  yield next;
}
app.use(reqlogger);

//Initialize session
app.keys=['koa-tutorial'];
app.use(session({
  cookie: {maxAge: 1000 * 60 * 5},
  store : redisStore()
}));

//Initialize passport with session
app.use(passport.initialize());
app.use(passport.session());

app.use(Router(app));

app.get('/', function *(){
  console.log('Express-style example');
  this.body = "This is root page ('/')";
});

const publicRouter = new Router();

//Configure /auth/github & /auth/github/callback
publicRouter.get('/auth/github', passport.authenticate('github', {scope: ['user','repo']}));
publicRouter.get('/auth/github/callback',
  passport.authenticate('github', {successReturnToOrRedirect: '/', failureRedirect: '/'})
);

app.use(publicRouter.middleware());

//Secures routes
const securedRouter = new Router();

//Middleware: authed
function *authed(next){
  if (this.req.isAuthenticated()){
    yield next;
  } else {
    //Set redirect path in session
    this.session.returnTo = this.session.returnTo || this.req.url;
    this.redirect('/auth/github');
  }
}

securedRouter.get('/app', authed, function *(){
  this.body = 'Secured Zone: koa-tutorial\n' + JSON.stringify(this.req.user, null, '\t');
});

securedRouter.get('/app2', authed, function *(){
  this.body = 'Secured Zone: koa-tutorial APP2\n'
});

app.use(securedRouter.middleware());

app.use(function *(){
  this.body = 'Hello World';
});

app.listen(3000);