/**
* Determines whether the AMI of the given instance matches the AMI of template and has the
* required label (if requiredLabel is non-null)
*/
private boolean checkInstance(
PrintStream logger,
Instance existingInstance,
Label requiredLabel,
EC2AbstractSlave[] returnNode) {
logProvision(logger, "checkInstance: " + existingInstance);
if (StringUtils.isNotBlank(getIamInstanceProfile())) {
if (existingInstance.getIamInstanceProfile() != null) {
if (!existingInstance.getIamInstanceProfile().getArn().equals(getIamInstanceProfile())) {
logProvision(logger, " false - IAM Instance profile does not match");
return false;
}
// Match, fall through
} else {
logProvision(logger, " false - Null IAM Instance profile");
return false;
}
}
if (existingInstance
.getState()
.getName()
.equalsIgnoreCase(InstanceStateName.Terminated.toString())
|| existingInstance
.getState()
.getName()
.equalsIgnoreCase(InstanceStateName.ShuttingDown.toString())) {
logProvision(logger, " false - Instance is terminated or shutting down");
return false;
}
// See if we know about this and it has capacity
for (EC2AbstractSlave node : NodeIterator.nodes(EC2AbstractSlave.class)) {
if (node.getInstanceId().equals(existingInstance.getInstanceId())) {
logProvision(logger, "Found existing corresponding Jenkins slave: " + node.getInstanceId());
if (!node.toComputer().isPartiallyIdle()) {
logProvision(logger, " false - Node is not partially idle");
return false;
}
// REMOVEME - this was added to force provision to work, but might not allow
// stopped instances to be found - need to investigate further
else if (false && node.toComputer().isOffline()) {
logProvision(logger, " false - Node is offline");
return false;
} else if (requiredLabel != null && !requiredLabel.matches(node.getAssignedLabels())) {
logProvision(logger, " false - we need a Node having label " + requiredLabel);
return false;
} else {
logProvision(logger, " true - Node has capacity - can use it");
returnNode[0] = node;
return true;
}
}
}
logProvision(logger, " true - Instance has no node, but can be used");
return true;
}
/**
* 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;
}