Thanks for the response. But it still does not work. I am running the script from a git bash on my windows 7. adding some debug prints, this is what I am running ssh -i key.pem -N -f -D8123 ubuntu@ec2-*.amazonaws.com ssh pid = 11616 /c/PROGRA~2/Java/jdk1.7.0_02/bin/jconsole.exe -J-DsocksProxyHost=localhost -J-DsocksProxyPort=8123 service:jmx:rmi:///jndi/rmi://ec2-*. amazonaws.com:7199/jmxrmi
Still getting "channel 2: open failed: connect failed: Connection timed out" Any further idea? Where are you running the script. Thanks *Tamar Fraenkel * Senior Software Engineer, TOK Media [image: Inline image 1] ta...@tok-media.com Tel: +972 2 6409736 Mob: +972 54 8356490 Fax: +972 2 5612956 On Mon, May 21, 2012 at 11:00 PM, ramesh <dbgroup...@gmail.com> wrote: > On 05/21/2012 03:55 AM, Tamar Fraenkel wrote: > > Hi! > I am trying the tunnel and it fails. Will be gratefull for some hints: > > I defined > > - proxy_host = ubuntu@my_ec2_cassandra_node_public_ip > - proxy_port = 22 > > I do: > *ssh -N -f -i /c/Users/tamar/.ssh/Amazon/tokey.openssh -D22 > ubuntu@my_ec2_cassandra_node_public_ip* > > I put some debug prints and I can see that the ssh_pid is indeed the > correct one. > > I run > *jconsole -J-DsocksProxyHost=localhost -J-DsocksProxyPort=22 > service:jmx:rmi:///jndi/rmi://my_ec2_cassandra_node_public_ip:7199/jmxrmi* > > I get errors and it fails: > channel 2: open failed: connect failed: Connection timed out > > One note though, I can ssh to that vm using > ssh -i /c/Users/tamar/.ssh/Amazon/tokey.openssh -D22 > ubuntu@my_ec2_cassandra_node_public_ip > without being prompted for PW. > > Any help appreciated > > *Tamar Fraenkel * > Senior Software Engineer, TOK Media > > [image: Inline image 1] > > ta...@tok-media.com > Tel: +972 2 6409736 > Mob: +972 54 8356490 > Fax: +972 2 5612956 > > > > > > On Fri, May 18, 2012 at 9:49 PM, ramesh <dbgroup...@gmail.com> wrote: > > On 05/18/2012 01:35 PM, Tyler Hobbs wrote: > > Your firewall rules need to allow TCP traffic on any port >= 1024 for JMX > to work. It initially connects on port 7199, but then the client is asked > to reconnect on a randomly chosen port. > > You can open the firewall, SSH to the node first, or set up something like > this: http://simplygenius.com/2010/08/jconsole-via-socks-ssh-tunnel.html > > On Fri, May 18, 2012 at 1:31 PM, ramesh <dbgroup...@gmail.com> wrote: > > I updated the cassandra-env.sh > $JMX_HOST="10.20.30.40" > JVM_OPTS="$JVM_OPTS -Djava.rmi.server.hostname=$JMX_HOST" > > netstat -ltn shows port 7199 is listening. > > I tried both public and private IP for connecting but neither helps. > > However, I am able to connect locally from within server. > > I get this error when I remote: > > Error connection to remote JMX agent! java.rmi.ConnectException: > Connection refused to host: 10.20.30.40; nested exception is: > java.net.ConnectException: Connection timed out at > sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:601) at > sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:198) at > sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:184) at > sun.rmi.server.UnicastRef.invoke(UnicastRef.java:110) at > javax.management.remote.rmi.RMIServerImpl_Stub.newClient(Unknown Source) at > javax.management.remote.rmi.RMIConnector.getConnection(RMIConnector.java:2329) > at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:279) > at > javax.management.remote.JMXConnectorFactory.connect(JMXConnectorFactory.java:248) > at org.apache.cassandra.tools.NodeProbe.connect(NodeProbe.java:144) at > org.apache.cassandra.tools.NodeProbe. (NodeProbe.java:114) at > org.apache.cassandra.tools.NodeCmd.main(NodeCmd.java:623) Caused by: > java.net.ConnectException: Connection timed out at > java.net.PlainSocketImpl.socketConnect(Native Method) at > java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351) at > java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213) at > java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200) at > java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366) at > java.net.Socket.connect(Socket.java:529) at > java.net.Socket.connect(Socket.java:478) at java.net.Socket. (Socket.java:375) > at java.net.Socket. (Socket.java:189) at > sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:22) > at > sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:128) > at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:595) ... > 10 more > > Any help appreciated. > Regards > Ramesh > > > > > -- > Tyler Hobbs > DataStax <http://datastax.com/> > > > It helped. > Thanks Tyler for the info and the link to the post. > > Regards > Ramesh > > > Hello Tamar, > > In your bash file, where you ssh , pass the .pem as well : > > # start up a background ssh tunnel on the desired port > ssh -i mypem.pem -N -f -D$proxy_port $proxy_host > > Here is the entire code > > > --------------------------------------------------------------------------------------------------- > #!/bin/bash > > function jc { > # set this to the host you'll proxy through. > > proxy_host="ubu...@ec2-xx-xx-xx-xx.compute-1.amazonaws.com"<ubu...@ec2-xx-xx-xx-xx.compute-1.amazonaws.com> > host=$1 > > jmxport=7199 # as specified by JMX_PORT in cassandra-env.sh > proxy_port=${2:-8123} > > if [ "x$host" = "x" ]; then > echo "Usage: jc [proxy port]" > return 1 > fi > > # start up a background ssh tunnel on the desired port > ssh -i *mypem.pem* -N -f -D$proxy_port $proxy_host > > # if the tunnel failed to come up, fail gracefully. > if [ $? -ne 0 ]; then > echo "Ssh tunnel failed" > return 1 > fi > > ssh_pid=`ps awwwx | grep "[s]sh -N -f -D$proxy_port" | awk '{print > $1}'` > echo "ssh pid = $ssh_pid" > > # Fire up jconsole to your remote host > jconsole -J-DsocksProxyHost=localhost -J-DsocksProxyPort=$proxy_port \ > service:jmx:rmi:///jndi/rmi://${host}:${jmxport}/jmxrmi > > # tear down the tunnel > kill $ssh_pid > } >
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