private List<BlockDeviceMapping> getNewEphemeralDeviceMapping() {
final List<BlockDeviceMapping> oldDeviceMapping = getAmiBlockDeviceMappings();
final Set<String> occupiedDevices = new HashSet<String>();
for (final BlockDeviceMapping mapping : oldDeviceMapping) {
occupiedDevices.add(mapping.getDeviceName());
}
final List<String> available =
new ArrayList<String>(
Arrays.asList("ephemeral0", "ephemeral1", "ephemeral2", "ephemeral3"));
final List<BlockDeviceMapping> newDeviceMapping = new ArrayList<BlockDeviceMapping>(4);
for (char suffix = 'b'; suffix <= 'z' && !available.isEmpty(); suffix++) {
final String deviceName = String.format("/dev/xvd%s", suffix);
if (occupiedDevices.contains(deviceName)) continue;
final BlockDeviceMapping newMapping =
new BlockDeviceMapping().withDeviceName(deviceName).withVirtualName(available.get(0));
newDeviceMapping.add(newMapping);
available.remove(0);
}
return newDeviceMapping;
}
/** Get a list of security group ids for the slave */
private List<String> getEc2SecurityGroups(AmazonEC2 ec2) throws AmazonClientException {
List<String> groupIds = new ArrayList<String>();
DescribeSecurityGroupsResult groupResult =
getSecurityGroupsBy("group-name", securityGroupSet, ec2);
if (groupResult.getSecurityGroups().size() == 0) {
groupResult = getSecurityGroupsBy("group-id", securityGroupSet, ec2);
}
for (SecurityGroup group : groupResult.getSecurityGroups()) {
if (group.getVpcId() != null && !group.getVpcId().isEmpty()) {
List<Filter> filters = new ArrayList<Filter>();
filters.add(new Filter("vpc-id").withValues(group.getVpcId()));
filters.add(new Filter("state").withValues("available"));
filters.add(new Filter("subnet-id").withValues(getSubnetId()));
DescribeSubnetsRequest subnetReq = new DescribeSubnetsRequest();
subnetReq.withFilters(filters);
DescribeSubnetsResult subnetResult = ec2.describeSubnets(subnetReq);
List<Subnet> subnets = subnetResult.getSubnets();
if (subnets != null && !subnets.isEmpty()) {
groupIds.add(group.getGroupId());
}
}
}
if (securityGroupSet.size() != groupIds.size()) {
throw new AmazonClientException(
"Security groups must all be VPC security groups to work in a VPC context");
}
return groupIds;
}
@Inject
public AwsEc2UnicastHostsProvider(
Settings settings,
TransportService transportService,
AwsEc2Service awsEc2Service,
Version version) {
super(settings);
this.transportService = transportService;
this.client = awsEc2Service.client();
this.version = version;
this.hostType =
HostType.valueOf(
settings.get("discovery.ec2.host_type", "private_ip").toUpperCase(Locale.ROOT));
this.bindAnyGroup = settings.getAsBoolean("discovery.ec2.any_group", true);
this.groups = new HashSet<>();
groups.addAll(Arrays.asList(settings.getAsArray("discovery.ec2.groups")));
this.tags = settings.getByPrefix("discovery.ec2.tag.").getAsMap();
Set<String> availabilityZones = new HashSet();
availabilityZones.addAll(
Arrays.asList(settings.getAsArray("discovery.ec2.availability_zones")));
if (settings.get("discovery.ec2.availability_zones") != null) {
availabilityZones.addAll(
Strings.commaDelimitedListToSet(settings.get("discovery.ec2.availability_zones")));
}
this.availabilityZones = availabilityZones;
if (logger.isDebugEnabled()) {
logger.debug(
"using host_type [{}], tags [{}], groups [{}] with any_group [{}], availability_zones [{}]",
hostType,
tags,
groups,
bindAnyGroup,
availabilityZones);
}
}
private DescribeInstancesRequest buildDescribeInstancesRequest() {
DescribeInstancesRequest describeInstancesRequest =
new DescribeInstancesRequest()
.withFilters(new Filter("instance-state-name").withValues("running", "pending"));
for (Map.Entry<String, String> tagFilter : tags.entrySet()) {
// for a given tag key, OR relationship for multiple different values
describeInstancesRequest.withFilters(
new Filter("tag:" + tagFilter.getKey()).withValues(tagFilter.getValue()));
}
if (!availabilityZones.isEmpty()) {
// OR relationship amongst multiple values of the availability-zone filter
describeInstancesRequest.withFilters(
new Filter("availability-zone").withValues(availabilityZones));
}
return describeInstancesRequest;
}
/** Provision a new slave for an EC2 spot instance to call back to Jenkins */
private EC2AbstractSlave provisionSpot(TaskListener listener)
throws AmazonClientException, IOException {
PrintStream logger = listener.getLogger();
AmazonEC2 ec2 = getParent().connect();
try {
logger.println("Launching " + ami + " for template " + description);
LOGGER.info("Launching " + ami + " for template " + description);
KeyPair keyPair = getKeyPair(ec2);
RequestSpotInstancesRequest spotRequest = new RequestSpotInstancesRequest();
// Validate spot bid before making the request
if (getSpotMaxBidPrice() == null) {
// throw new FormException("Invalid Spot price specified: " +
// getSpotMaxBidPrice(), "spotMaxBidPrice");
throw new AmazonClientException("Invalid Spot price specified: " + getSpotMaxBidPrice());
}
spotRequest.setSpotPrice(getSpotMaxBidPrice());
spotRequest.setInstanceCount(1);
LaunchSpecification launchSpecification = new LaunchSpecification();
InstanceNetworkInterfaceSpecification net = new InstanceNetworkInterfaceSpecification();
launchSpecification.setImageId(ami);
launchSpecification.setInstanceType(type);
if (StringUtils.isNotBlank(getZone())) {
SpotPlacement placement = new SpotPlacement(getZone());
launchSpecification.setPlacement(placement);
}
if (StringUtils.isNotBlank(getSubnetId())) {
if (getAssociatePublicIp()) {
net.setSubnetId(getSubnetId());
} else {
launchSpecification.setSubnetId(getSubnetId());
}
/*
* If we have a subnet ID then we can only use VPC security groups
*/
if (!securityGroupSet.isEmpty()) {
List<String> groupIds = getEc2SecurityGroups(ec2);
if (!groupIds.isEmpty()) {
if (getAssociatePublicIp()) {
net.setGroups(groupIds);
} else {
ArrayList<GroupIdentifier> groups = new ArrayList<GroupIdentifier>();
for (String group_id : groupIds) {
GroupIdentifier group = new GroupIdentifier();
group.setGroupId(group_id);
groups.add(group);
}
if (!groups.isEmpty()) launchSpecification.setAllSecurityGroups(groups);
}
}
}
} else {
/* No subnet: we can use standard security groups by name */
if (!securityGroupSet.isEmpty()) {
launchSpecification.setSecurityGroups(securityGroupSet);
}
}
String userDataString = Base64.encodeBase64String(userData.getBytes(StandardCharsets.UTF_8));
launchSpecification.setUserData(userDataString);
launchSpecification.setKeyName(keyPair.getKeyName());
launchSpecification.setInstanceType(type.toString());
if (getAssociatePublicIp()) {
net.setAssociatePublicIpAddress(true);
net.setDeviceIndex(0);
launchSpecification.withNetworkInterfaces(net);
}
boolean hasCustomTypeTag = false;
HashSet<Tag> instTags = null;
if (tags != null && !tags.isEmpty()) {
instTags = new HashSet<Tag>();
for (EC2Tag t : tags) {
instTags.add(new Tag(t.getName(), t.getValue()));
if (StringUtils.equals(t.getName(), EC2Tag.TAG_NAME_JENKINS_SLAVE_TYPE)) {
hasCustomTypeTag = true;
}
}
}
if (!hasCustomTypeTag) {
if (instTags != null)
instTags.add(
new Tag(
EC2Tag.TAG_NAME_JENKINS_SLAVE_TYPE,
EC2Cloud.getSlaveTypeTagValue(EC2Cloud.EC2_SLAVE_TYPE_SPOT, description)));
}
if (StringUtils.isNotBlank(getIamInstanceProfile())) {
launchSpecification.setIamInstanceProfile(
new IamInstanceProfileSpecification().withArn(getIamInstanceProfile()));
}
if (useEphemeralDevices) {
setupEphemeralDeviceMapping(launchSpecification);
} else {
setupCustomDeviceMapping(launchSpecification);
}
spotRequest.setLaunchSpecification(launchSpecification);
// Make the request for a new Spot instance
RequestSpotInstancesResult reqResult = ec2.requestSpotInstances(spotRequest);
List<SpotInstanceRequest> reqInstances = reqResult.getSpotInstanceRequests();
if (reqInstances.isEmpty()) {
throw new AmazonClientException("No spot instances found");
}
SpotInstanceRequest spotInstReq = reqInstances.get(0);
if (spotInstReq == null) {
throw new AmazonClientException("Spot instance request is null");
}
String slaveName = spotInstReq.getSpotInstanceRequestId();
/* Now that we have our Spot request, we can set tags on it */
if (instTags != null) {
updateRemoteTags(
ec2,
instTags,
"InvalidSpotInstanceRequestID.NotFound",
spotInstReq.getSpotInstanceRequestId());
// That was a remote request - we should also update our local
// instance data.
spotInstReq.setTags(instTags);
}
logger.println("Spot instance id in provision: " + spotInstReq.getSpotInstanceRequestId());
LOGGER.info("Spot instance id in provision: " + spotInstReq.getSpotInstanceRequestId());
return newSpotSlave(spotInstReq, slaveName);
} catch (FormException e) {
throw new AssertionError(); // we should have discovered all
// configuration issues upfront
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
/**
* Provisions an On-demand EC2 slave by launching a new instance or starting a previously-stopped
* instance.
*/
private EC2AbstractSlave provisionOndemand(
TaskListener listener, Label requiredLabel, EnumSet<ProvisionOptions> provisionOptions)
throws AmazonClientException, IOException {
PrintStream logger = listener.getLogger();
AmazonEC2 ec2 = getParent().connect();
try {
logProvisionInfo(logger, "Considering launching " + ami + " for template " + description);
KeyPair keyPair = getKeyPair(ec2);
RunInstancesRequest riRequest = new RunInstancesRequest(ami, 1, 1);
InstanceNetworkInterfaceSpecification net = new InstanceNetworkInterfaceSpecification();
riRequest.setEbsOptimized(ebsOptimized);
if (useEphemeralDevices) {
setupEphemeralDeviceMapping(riRequest);
} else {
setupCustomDeviceMapping(riRequest);
}
if (stopOnTerminate) {
riRequest.setInstanceInitiatedShutdownBehavior(ShutdownBehavior.Stop);
logProvisionInfo(
logger, "Setting Instance Initiated Shutdown Behavior : ShutdownBehavior.Stop");
} else {
riRequest.setInstanceInitiatedShutdownBehavior(ShutdownBehavior.Terminate);
logProvisionInfo(
logger, "Setting Instance Initiated Shutdown Behavior : ShutdownBehavior.Terminate");
}
List<Filter> diFilters = new ArrayList<Filter>();
diFilters.add(new Filter("image-id").withValues(ami));
if (StringUtils.isNotBlank(getZone())) {
Placement placement = new Placement(getZone());
if (getUseDedicatedTenancy()) {
placement.setTenancy("dedicated");
}
riRequest.setPlacement(placement);
diFilters.add(new Filter("availability-zone").withValues(getZone()));
}
if (StringUtils.isNotBlank(getSubnetId())) {
if (getAssociatePublicIp()) {
net.setSubnetId(getSubnetId());
} else {
riRequest.setSubnetId(getSubnetId());
}
diFilters.add(new Filter("subnet-id").withValues(getSubnetId()));
/*
* If we have a subnet ID then we can only use VPC security groups
*/
if (!securityGroupSet.isEmpty()) {
List<String> groupIds = getEc2SecurityGroups(ec2);
if (!groupIds.isEmpty()) {
if (getAssociatePublicIp()) {
net.setGroups(groupIds);
} else {
riRequest.setSecurityGroupIds(groupIds);
}
diFilters.add(new Filter("instance.group-id").withValues(groupIds));
}
}
} else {
/* No subnet: we can use standard security groups by name */
riRequest.setSecurityGroups(securityGroupSet);
if (!securityGroupSet.isEmpty()) {
diFilters.add(new Filter("instance.group-name").withValues(securityGroupSet));
}
}
String userDataString = Base64.encodeBase64String(userData.getBytes(StandardCharsets.UTF_8));
riRequest.setUserData(userDataString);
riRequest.setKeyName(keyPair.getKeyName());
diFilters.add(new Filter("key-name").withValues(keyPair.getKeyName()));
riRequest.setInstanceType(type.toString());
diFilters.add(new Filter("instance-type").withValues(type.toString()));
if (getAssociatePublicIp()) {
net.setAssociatePublicIpAddress(true);
net.setDeviceIndex(0);
riRequest.withNetworkInterfaces(net);
}
boolean hasCustomTypeTag = false;
HashSet<Tag> instTags = null;
if (tags != null && !tags.isEmpty()) {
instTags = new HashSet<Tag>();
for (EC2Tag t : tags) {
instTags.add(new Tag(t.getName(), t.getValue()));
diFilters.add(new Filter("tag:" + t.getName()).withValues(t.getValue()));
if (StringUtils.equals(t.getName(), EC2Tag.TAG_NAME_JENKINS_SLAVE_TYPE)) {
hasCustomTypeTag = true;
}
}
}
if (!hasCustomTypeTag) {
if (instTags == null) {
instTags = new HashSet<Tag>();
}
// Append template description as well to identify slaves provisioned per template
instTags.add(
new Tag(
EC2Tag.TAG_NAME_JENKINS_SLAVE_TYPE,
EC2Cloud.getSlaveTypeTagValue(EC2Cloud.EC2_SLAVE_TYPE_DEMAND, description)));
}
DescribeInstancesRequest diRequest = new DescribeInstancesRequest();
diRequest.setFilters(diFilters);
logProvision(logger, "Looking for existing instances with describe-instance: " + diRequest);
DescribeInstancesResult diResult = ec2.describeInstances(diRequest);
EC2AbstractSlave[] ec2Node = new EC2AbstractSlave[1];
Instance existingInstance = null;
if (!provisionOptions.contains(ProvisionOptions.FORCE_CREATE)) {
reservationLoop:
for (Reservation reservation : diResult.getReservations()) {
for (Instance instance : reservation.getInstances()) {
if (checkInstance(logger, instance, requiredLabel, ec2Node)) {
existingInstance = instance;
logProvision(
logger,
"Found existing instance: "
+ existingInstance
+ ((ec2Node[0] != null) ? (" node: " + ec2Node[0].getInstanceId()) : ""));
break reservationLoop;
}
}
}
}
if (existingInstance == null) {
if (!provisionOptions.contains(ProvisionOptions.FORCE_CREATE)
&& !provisionOptions.contains(ProvisionOptions.ALLOW_CREATE)) {
logProvision(logger, "No existing instance found - but cannot create new instance");
return null;
}
if (StringUtils.isNotBlank(getIamInstanceProfile())) {
riRequest.setIamInstanceProfile(
new IamInstanceProfileSpecification().withArn(getIamInstanceProfile()));
}
// Have to create a new instance
Instance inst = ec2.runInstances(riRequest).getReservation().getInstances().get(0);
/* Now that we have our instance, we can set tags on it */
if (instTags != null) {
updateRemoteTags(ec2, instTags, "InvalidInstanceID.NotFound", inst.getInstanceId());
// That was a remote request - we should also update our
// local instance data.
inst.setTags(instTags);
}
logProvisionInfo(logger, "No existing instance found - created new instance: " + inst);
return newOndemandSlave(inst);
}
if (existingInstance
.getState()
.getName()
.equalsIgnoreCase(InstanceStateName.Stopping.toString())
|| existingInstance
.getState()
.getName()
.equalsIgnoreCase(InstanceStateName.Stopped.toString())) {
List<String> instances = new ArrayList<String>();
instances.add(existingInstance.getInstanceId());
StartInstancesRequest siRequest = new StartInstancesRequest(instances);
StartInstancesResult siResult = ec2.startInstances(siRequest);
logProvisionInfo(
logger,
"Found stopped instance - starting it: " + existingInstance + " result:" + siResult);
} else {
// Should be pending or running at this point, just let it come up
logProvisionInfo(
logger,
"Found existing pending or running: "
+ existingInstance.getState().getName()
+ " instance: "
+ existingInstance);
}
if (ec2Node[0] != null) {
logProvisionInfo(logger, "Using existing slave: " + ec2Node[0].getInstanceId());
return ec2Node[0];
}
// Existing slave not found
logProvision(logger, "Creating new slave for existing instance: " + existingInstance);
return newOndemandSlave(existingInstance);
} catch (FormException e) {
throw new AssertionError(e); // we should have discovered all
// configuration issues upfront
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
@Override
public List<DiscoveryNode> buildDynamicNodes() {
List<DiscoveryNode> discoNodes = new ArrayList<>();
DescribeInstancesResult descInstances;
try {
// Query EC2 API based on AZ, instance state, and tag.
// NOTE: we don't filter by security group during the describe instances request for two
// reasons:
// 1. differences in VPCs require different parameters during query (ID vs Name)
// 2. We want to use two different strategies: (all security groups vs. any security groups)
descInstances = client.describeInstances(buildDescribeInstancesRequest());
} catch (AmazonClientException e) {
logger.info("Exception while retrieving instance list from AWS API: {}", e.getMessage());
logger.debug("Full exception:", e);
return discoNodes;
}
logger.trace("building dynamic unicast discovery nodes...");
for (Reservation reservation : descInstances.getReservations()) {
for (Instance instance : reservation.getInstances()) {
// lets see if we can filter based on groups
if (!groups.isEmpty()) {
List<GroupIdentifier> instanceSecurityGroups = instance.getSecurityGroups();
ArrayList<String> securityGroupNames = new ArrayList<String>();
ArrayList<String> securityGroupIds = new ArrayList<String>();
for (GroupIdentifier sg : instanceSecurityGroups) {
securityGroupNames.add(sg.getGroupName());
securityGroupIds.add(sg.getGroupId());
}
if (bindAnyGroup) {
// We check if we can find at least one group name or one group id in groups.
if (Collections.disjoint(securityGroupNames, groups)
&& Collections.disjoint(securityGroupIds, groups)) {
logger.trace(
"filtering out instance {} based on groups {}, not part of {}",
instance.getInstanceId(),
instanceSecurityGroups,
groups);
// continue to the next instance
continue;
}
} else {
// We need tp match all group names or group ids, otherwise we ignore this instance
if (!(securityGroupNames.containsAll(groups) || securityGroupIds.containsAll(groups))) {
logger.trace(
"filtering out instance {} based on groups {}, does not include all of {}",
instance.getInstanceId(),
instanceSecurityGroups,
groups);
// continue to the next instance
continue;
}
}
}
String address = null;
switch (hostType) {
case PRIVATE_DNS:
address = instance.getPrivateDnsName();
break;
case PRIVATE_IP:
address = instance.getPrivateIpAddress();
break;
case PUBLIC_DNS:
address = instance.getPublicDnsName();
break;
case PUBLIC_IP:
address = instance.getPublicIpAddress();
break;
}
if (address != null) {
try {
TransportAddress[] addresses = transportService.addressesFromString(address);
// we only limit to 1 addresses, makes no sense to ping 100 ports
for (int i = 0; (i < addresses.length && i < UnicastZenPing.LIMIT_PORTS_COUNT); i++) {
logger.trace(
"adding {}, address {}, transport_address {}",
instance.getInstanceId(),
address,
addresses[i]);
discoNodes.add(
new DiscoveryNode(
"#cloud-" + instance.getInstanceId() + "-" + i,
addresses[i],
version.minimumCompatibilityVersion()));
}
} catch (Exception e) {
logger.warn("failed ot add {}, address {}", e, instance.getInstanceId(), address);
}
} else {
logger.trace(
"not adding {}, address is null, host_type {}", instance.getInstanceId(), hostType);
}
}
}
logger.debug("using dynamic discovery nodes {}", discoNodes);
return discoNodes;
}