/**
* Remove given flag from current db config in zk
*
* @param flagName
*/
void removeFlag(String flagName) {
config.removeConfig(flagName);
coordinator.persistServiceConfiguration(config);
}
/**
* We select seeds based on the following rules - For DR standby sites, use all nodes in active
* site as seeds For DR active site, use local nodes as seeds. The rule to select local seed is -
* first boot node(AUTOBOOT = false) uses itself as seed nodes so that it could boot and
* initialize schema - subsquent node(AUTOBOOT = true) uses other successfully booted(JOINED =
* true) nodes as seeds
*/
@Override
public List<InetAddress> getSeeds() {
try {
CoordinatorClientInetAddressMap nodeMap = _client.getInetAddessLookupMap();
List<Configuration> configs =
_client.queryAllConfiguration(_client.getSiteId(), Constants.DB_CONFIG);
List<InetAddress> seeds = new ArrayList<>();
// If we are upgrading from pre-2.5 releases, dbconfig exists in zk global area
List<Configuration> leftoverConfig = _client.queryAllConfiguration(Constants.DB_CONFIG);
configs.addAll(leftoverConfig);
// Add extra seeds - seeds from remote sites
for (String seed : extraSeeds) {
if (StringUtils.isNotEmpty(seed)) {
seeds.add(InetAddress.getByName(seed));
}
}
// On DR standby site, only use seeds from active site. On active site
// we use local seeds
if (isDrActiveSite) {
for (int i = 0; i < configs.size(); i++) {
Configuration config = configs.get(i);
// Bypasses item of "global" and folders of "version", just check db configurations.
if (config.getId() == null || config.getId().equals(Constants.GLOBAL_ID)) {
continue;
}
String nodeIndex = config.getId().split("-")[1];
String nodeId = config.getConfig(DbConfigConstants.NODE_ID);
if (nodeId == null) {
// suppose that they are existing znodes from a previous version
// set the NODE_ID config, id is like db-x
nodeId = "vipr" + nodeIndex;
config.setConfig(DbConfigConstants.NODE_ID, nodeId);
config.removeConfig(DbConfigConstants.DB_IP);
_client.persistServiceConfiguration(_client.getSiteId(), config);
}
if (!Boolean.parseBoolean(config.getConfig(DbConfigConstants.AUTOBOOT))
|| (!config.getId().equals(_id)
&& Boolean.parseBoolean(config.getConfig(DbConfigConstants.JOINED)))) {
// all non autobootstrap nodes + other nodes are used as seeds
InetAddress ip = null;
if (nodeMap != null) {
String ipAddress = nodeMap.getConnectableInternalAddress(nodeId);
_logger.debug("ip[" + i + "]: " + ipAddress);
ip = InetAddress.getByName(ipAddress);
} else {
ip = InetAddress.getByName(nodeId);
}
seeds.add(ip);
_logger.info("Seed {}", ip);
}
}
}
_logger.info("Seeds list {}", StringUtils.join(seeds.toArray(), ","));
return seeds;
} catch (Exception e) {
throw new IllegalStateException(e);
}
}