/**
* Counts the number of instances in EC2 currently running that are using the specified image and
* a template.
*
* @param ami If AMI is left null, then all instances are counted and template description is
* ignored.
* <p>This includes those instances that may be started outside Jenkins.
* @param templateDesc
*/
public int countCurrentEC2Slaves(String ami, String templateDesc) throws AmazonClientException {
int n = 0;
for (Reservation r : connect().describeInstances().getReservations()) {
for (Instance i : r.getInstances()) {
if (isEc2ProvisionedAmiSlave(i, ami, templateDesc)) {
InstanceStateName stateName = InstanceStateName.fromValue(i.getState().getName());
if (stateName == InstanceStateName.Pending || stateName == InstanceStateName.Running) {
EC2AbstractSlave foundSlave = null;
for (EC2AbstractSlave ec2Node : NodeIterator.nodes(EC2AbstractSlave.class)) {
if (ec2Node.getInstanceId().equals(i.getInstanceId())) {
foundSlave = ec2Node;
break;
}
}
// Don't count disconnected slaves as being used, we will connected them later is
// required
if (foundSlave != null && foundSlave.toComputer().isOffline()) continue;
n++;
}
}
}
}
// Count pending spot requests too
for (SpotInstanceRequest sir :
connect().describeSpotInstanceRequests().getSpotInstanceRequests()) {
// Count Spot requests that are open and still have a
// chance to be active.
if (sir.getState().equals("open")) {
n++;
}
}
return n;
}
/** Debug command to attach to a running instance. */
public void doAttach(StaplerRequest req, StaplerResponse rsp, @QueryParameter String id)
throws ServletException, IOException, AmazonClientException {
checkPermission(PROVISION);
SlaveTemplate t = getTemplates().get(0);
StringWriter sw = new StringWriter();
StreamTaskListener listener = new StreamTaskListener(sw);
EC2AbstractSlave node = t.attach(id, listener);
Hudson.getInstance().addNode(node);
rsp.sendRedirect2(req.getContextPath() + "/computer/" + node.getNodeName());
}
public HttpResponse doProvision(@QueryParameter String template)
throws ServletException, IOException {
checkPermission(PROVISION);
if (template == null) {
throw HttpResponses.error(SC_BAD_REQUEST, "The 'template' query parameter is missing");
}
SlaveTemplate t = getTemplate(template);
if (t == null) {
throw HttpResponses.error(SC_BAD_REQUEST, "No such template: " + template);
}
StringWriter sw = new StringWriter();
StreamTaskListener listener = new StreamTaskListener(sw);
try {
EC2AbstractSlave node = t.provision(listener);
Hudson.getInstance().addNode(node);
return HttpResponses.redirectViaContextPath("/computer/" + node.getNodeName());
} catch (AmazonClientException e) {
throw HttpResponses.error(SC_INTERNAL_SERVER_ERROR, e);
}
}