Ignite Talk at DevOpsDays Jakarta

1. Migrating to Openshift
Our Challenge

2. Reyhan Fabianto
Software Engineer, DOKU

5. recommends only up to 3 instances

6. ROUTER
BROWSER
Create session
Retrieve session
SESSION NULL

7. ROUTER
BROWSER
Create session
Retrieve session
SESSION NULL

8. Performance
Scalability
Availability

9. 128 applications

10. Filters
public void doFilter(ServletRequest originalRequest,
ServletResponse originalResponse, FilterChain chain)
throws IOException, ServletException {
// Insert code here
}

11. <filter>
<filter-name>SessionFilter</filter-name>
<filter-class>com.amadeus.session.servlet.SessionFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>SessionFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

13. Javaagent

14. java.lang.instrument

15. JAVA_OPTS=“$JAVA_OPTS -javaagent:session-agent-0.4.7.jar=
provider=com.amadeus.session.repository.redis.JedisSessionRe
positoryFactory,timeout=1800,log=debug"

17. public class Hello {
public void run(String message) {
System.out.println("Hello " + message);
}
public class Hello {
public void run(String message) {
System.out.println("Hello " + message);
}
}
public static void main(String[] args) {
Hello hello = new Hello();
hello.run(args[0]);
}

18. ClassPool cp = ClassPool.getDefault();
cp.importPackage(“redis.clients.jedis.Jedis");
CtClass cc = cp.get("other.Hello");
cc.addField(CtField.make("Jedis jedis = new Jedis();", cc));
CtMethod cm = cc.getDeclaredMethod("run");
cm.insertAfter("jedis.set(message, message + ” saved in Redis”);");
byte[] byteCode = cc.toBytecode();
cc.detach();
ClassPool cp = ClassPool.getDefault();
cp.importPackage(“redis.clients.jedis.Jedis");
CtClass cc = cp.get("other.Hello");
cc.addField(CtField.make("Jedis jedis = new Jedis();", cc));
CtMethod cm = cc.getDeclaredMethod("run");
cm.insertAfter("jedis.set(message, message + ” saved in Redis”);");
byte[] byteCode = cc.toBytecode();
cc.detach();
return byteCode;

20. Thank you