private void checkSecurityGroupCapacity(Reservation reservation, SecurityGroup securityGroup) {
LOG.debug(String.format("checking security group: %s", securityGroup));
int numberOfInstancesInSecurityGroup = securityGroup.getInstances().size();
if (numberOfInstancesInSecurityGroup == 0) {
LOG.debug(String.format("No instances in security group: %s", securityGroup));
return;
}
if (securityGroup.getNetmask() == null) {
LOG.debug(String.format("Unable to get the netmask for security group: %s", securityGroup));
return;
}
int availableNumberOfInstancesInSecurityGroup = getSecurityGroupCapacity(securityGroup);
LOG.debug(
String.format(
"SecurityGroup: %s - Number of Instances: %d - Capacity in SecurityGroup: %d",
securityGroup.getUrl(),
numberOfInstancesInSecurityGroup,
availableNumberOfInstancesInSecurityGroup));
if (numberOfInstancesInSecurityGroup + reservation.getMinCount()
> availableNumberOfInstancesInSecurityGroup
- NUMBER_OF_RESERVED_ADDRESSES_IN_SECURITY_GROUP)
throw new IllegalStateException(
"unable to run instances as no more capacity in security group");
}
private boolean validateSecurityGroup(SecurityGroup securityGroup) {
if (null == securityGroup.getNetmask() || null == securityGroup.getVlanId()) return false;
return true;
}
private int getSecurityGroupCapacity(SecurityGroup securityGroup) {
String netmask = securityGroup.getNetmask();
int addrsInSlashnet = IpAddressUtils.addrsInSlashnet(IpAddressUtils.netmaskToSlashnet(netmask));
return addrsInSlashnet;
}