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etcd config source implementation.
syntax = "proto3";
import "kv.proto";
import "auth.proto";
package etcdserverpb;
option java_multiple_files = true;
option java_package = "io.helidon.config.etcd.internal.client.proto";
option java_outer_classname = "EtcdProto";
option objc_class_prefix = "Etcd";
service KV {
// Range gets the keys in the range from the key-value store.
rpc Range(RangeRequest) returns (RangeResponse) {}
// Put puts the given key into the key-value store.
// A put request increments the revision of the key-value store
// and generates one event in the event history.
rpc Put(PutRequest) returns (PutResponse) {}
// DeleteRange deletes the given range from the key-value store.
// A delete request increments the revision of the key-value store
// and generates a delete event in the event history for every deleted key.
rpc DeleteRange(DeleteRangeRequest) returns (DeleteRangeResponse) {}
// Txn processes multiple requests in a single transaction.
// A txn request increments the revision of the key-value store
// and generates events with the same revision for every completed request.
// It is not allowed to modify the same key several times within one txn.
rpc Txn(TxnRequest) returns (TxnResponse) {}
// Compact compacts the event history in the etcd key-value store. The key-value
// store should be periodically compacted or the event history will continue to grow
// indefinitely.
rpc Compact(CompactionRequest) returns (CompactionResponse) {}
}
service Watch {
// Watch watches for events happening or that have happened. Both input and output
// are streams; the input stream is for creating and canceling watchers and the output
// stream sends events. One watch RPC can watch on multiple key ranges, streaming events
// for several watches at once. The entire event history can be watched starting from the
// last compaction revision.
rpc Watch(stream WatchRequest) returns (stream WatchResponse) {}
}
service Lease {
// LeaseGrant creates a lease which expires if the server does not receive a keepAlive
// within a given time to live period. All keys attached to the lease will be expired and
// deleted if the lease expires. Each expired key generates a delete event in the event history.
rpc LeaseGrant(LeaseGrantRequest) returns (LeaseGrantResponse) {}
// LeaseRevoke revokes a lease. All keys attached to the lease will expire and be deleted.
rpc LeaseRevoke(LeaseRevokeRequest) returns (LeaseRevokeResponse) {}
// LeaseKeepAlive keeps the lease alive by streaming keep alive requests from the client
// to the server and streaming keep alive responses from the server to the client.
rpc LeaseKeepAlive(stream LeaseKeepAliveRequest) returns (stream LeaseKeepAliveResponse) {}
// LeaseTimeToLive retrieves lease information.
rpc LeaseTimeToLive(LeaseTimeToLiveRequest) returns (LeaseTimeToLiveResponse) {}
// TODO(xiangli) List all existing Leases?
}
service Cluster {
// MemberAdd adds a member into the cluster.
rpc MemberAdd(MemberAddRequest) returns (MemberAddResponse) {}
// MemberRemove removes an existing member from the cluster.
rpc MemberRemove(MemberRemoveRequest) returns (MemberRemoveResponse) {}
// MemberUpdate updates the member configuration.
rpc MemberUpdate(MemberUpdateRequest) returns (MemberUpdateResponse) {}
// MemberList lists all the members in the cluster.
rpc MemberList(MemberListRequest) returns (MemberListResponse) {}
}
service Maintenance {
// Alarm activates, deactivates, and queries alarms regarding cluster health.
rpc Alarm(AlarmRequest) returns (AlarmResponse) {}
// Status gets the status of the member.
rpc Status(StatusRequest) returns (StatusResponse) {}
// Defragment defragments a member's backend database to recover storage space.
rpc Defragment(DefragmentRequest) returns (DefragmentResponse) {}
// Hash returns the hash of the local KV state for consistency checking purpose.
// This is designed for testing; do not use this in production when there
// are ongoing transactions.
rpc Hash(HashRequest) returns (HashResponse) {}
// Snapshot sends a snapshot of the entire backend from a member over a stream to a client.
rpc Snapshot(SnapshotRequest) returns (stream SnapshotResponse) {}
}
service Auth {
// AuthEnable enables authentication.
rpc AuthEnable(AuthEnableRequest) returns (AuthEnableResponse) {}
// AuthDisable disables authentication.
rpc AuthDisable(AuthDisableRequest) returns (AuthDisableResponse) {}
// Authenticate processes an authenticate request.
rpc Authenticate(AuthenticateRequest) returns (AuthenticateResponse) {}
// UserAdd adds a new user.
rpc UserAdd(AuthUserAddRequest) returns (AuthUserAddResponse) {}
// UserGet gets detailed user information.
rpc UserGet(AuthUserGetRequest) returns (AuthUserGetResponse) {}
// UserList gets a list of all users.
rpc UserList(AuthUserListRequest) returns (AuthUserListResponse) {}
// UserDelete deletes a specified user.
rpc UserDelete(AuthUserDeleteRequest) returns (AuthUserDeleteResponse) {}
// UserChangePassword changes the password of a specified user.
rpc UserChangePassword(AuthUserChangePasswordRequest) returns (AuthUserChangePasswordResponse) {}
// UserGrant grants a role to a specified user.
rpc UserGrantRole(AuthUserGrantRoleRequest) returns (AuthUserGrantRoleResponse) {}
// UserRevokeRole revokes a role of specified user.
rpc UserRevokeRole(AuthUserRevokeRoleRequest) returns (AuthUserRevokeRoleResponse) {}
// RoleAdd adds a new role.
rpc RoleAdd(AuthRoleAddRequest) returns (AuthRoleAddResponse) {}
// RoleGet gets detailed role information.
rpc RoleGet(AuthRoleGetRequest) returns (AuthRoleGetResponse) {}
// RoleList gets lists of all roles.
rpc RoleList(AuthRoleListRequest) returns (AuthRoleListResponse) {}
// RoleDelete deletes a specified role.
rpc RoleDelete(AuthRoleDeleteRequest) returns (AuthRoleDeleteResponse) {}
// RoleGrantPermission grants a permission of a specified key or range to a specified role.
rpc RoleGrantPermission(AuthRoleGrantPermissionRequest) returns (AuthRoleGrantPermissionResponse) {}
// RoleRevokePermission revokes a key or range permission of a specified role.
rpc RoleRevokePermission(AuthRoleRevokePermissionRequest) returns (AuthRoleRevokePermissionResponse) {}
}
message ResponseHeader {
// cluster_id is the ID of the cluster which sent the response.
uint64 cluster_id = 1;
// member_id is the ID of the member which sent the response.
uint64 member_id = 2;
// revision is the key-value store revision when the request was applied.
int64 revision = 3;
// raft_term is the raft term when the request was applied.
uint64 raft_term = 4;
}
message RangeRequest {
enum SortOrder {
NONE = 0; // default, no sorting
ASCEND = 1; // lowest target value first
DESCEND = 2; // highest target value first
}
enum SortTarget {
KEY = 0;
VERSION = 1;
CREATE = 2;
MOD = 3;
VALUE = 4;
}
// key is the first key for the range. If range_end is not given, the request only looks up key.
bytes key = 1;
// range_end is the upper bound on the requested range [key, range_end).
// If range_end is '\0', the range is all keys >= key.
// If range_end is key plus one (e.g., "aa"+1 == "ab", "a\xff"+1 == "b"),
// then the range request gets all keys prefixed with key.
// If both key and range_end are '\0', then the range request returns all keys.
bytes range_end = 2;
// limit is a limit on the number of keys returned for the request.
int64 limit = 3;
// revision is the point-in-time of the key-value store to use for the range.
// If revision is less or equal to zero, the range is over the newest key-value store.
// If the revision has been compacted, ErrCompacted is returned as a response.
int64 revision = 4;
// sort_order is the order for returned sorted results.
SortOrder sort_order = 5;
// sort_target is the key-value field to use for sorting.
SortTarget sort_target = 6;
// serializable sets the range request to use serializable member-local reads.
// Range requests are linearizable by default; linearizable requests have higher
// latency and lower throughput than serializable requests but reflect the current
// consensus of the cluster. For better performance, in exchange for possible stale reads,
// a serializable range request is served locally without needing to reach consensus
// with other nodes in the cluster.
bool serializable = 7;
// keys_only when set returns only the keys and not the values.
bool keys_only = 8;
// count_only when set returns only the count of the keys in the range.
bool count_only = 9;
// min_mod_revision is the lower bound for returned key mod revisions; all keys with
// lesser mod revisions will be filtered away.
int64 min_mod_revision = 10;
// max_mod_revision is the upper bound for returned key mod revisions; all keys with
// greater mod revisions will be filtered away.
int64 max_mod_revision = 11;
// min_create_revision is the lower bound for returned key create revisions; all keys with
// lesser create trevisions will be filtered away.
int64 min_create_revision = 12;
// max_create_revision is the upper bound for returned key create revisions; all keys with
// greater create revisions will be filtered away.
int64 max_create_revision = 13;
}
message RangeResponse {
ResponseHeader header = 1;
// kvs is the list of key-value pairs matched by the range request.
// kvs is empty when count is requested.
repeated mvccpb.KeyValue kvs = 2;
// more indicates if there are more keys to return in the requested range.
bool more = 3;
// count is set to the number of keys within the range when requested.
int64 count = 4;
}
message PutRequest {
// key is the key, in bytes, to put into the key-value store.
bytes key = 1;
// value is the value, in bytes, to associate with the key in the key-value store.
bytes value = 2;
// lease is the lease ID to associate with the key in the key-value store. A lease
// value of 0 indicates no lease.
int64 lease = 3;
// If prev_kv is set, etcd gets the previous key-value pair before changing it.
// The previous key-value pair will be returned in the put response.
bool prev_kv = 4;
// If ignore_value is set, etcd updates the key using its current value.
// Returns an error if the key does not exist.
bool ignore_value = 5;
// If ignore_lease is set, etcd updates the key using its current lease.
// Returns an error if the key does not exist.
bool ignore_lease = 6;
}
message PutResponse {
ResponseHeader header = 1;
// if prev_kv is set in the request, the previous key-value pair will be returned.
mvccpb.KeyValue prev_kv = 2;
}
message DeleteRangeRequest {
// key is the first key to delete in the range.
bytes key = 1;
// range_end is the key following the last key to delete for the range [key, range_end).
// If range_end is not given, the range is defined to contain only the key argument.
// If range_end is one bit larger than the given key, then the range is all
// the all keys with the prefix (the given key).
// If range_end is '\0', the range is all keys greater than or equal to the key argument.
bytes range_end = 2;
// If prev_kv is set, etcd gets the previous key-value pairs before deleting it.
// The previous key-value pairs will be returned in the delte response.
bool prev_kv = 3;
}
message DeleteRangeResponse {
ResponseHeader header = 1;
// deleted is the number of keys deleted by the delete range request.
int64 deleted = 2;
// if prev_kv is set in the request, the previous key-value pairs will be returned.
repeated mvccpb.KeyValue prev_kvs = 3;
}
message RequestOp {
// request is a union of request types accepted by a transaction.
oneof request {
RangeRequest request_range = 1;
PutRequest request_put = 2;
DeleteRangeRequest request_delete_range = 3;
}
}
message ResponseOp {
// response is a union of response types returned by a transaction.
oneof response {
RangeResponse response_range = 1;
PutResponse response_put = 2;
DeleteRangeResponse response_delete_range = 3;
}
}
message Compare {
enum CompareResult {
EQUAL = 0;
GREATER = 1;
LESS = 2;
NOT_EQUAL = 3;
}
enum CompareTarget {
VERSION = 0;
CREATE = 1;
MOD = 2;
VALUE= 3;
}
// result is logical comparison operation for this comparison.
CompareResult result = 1;
// target is the key-value field to inspect for the comparison.
CompareTarget target = 2;
// key is the subject key for the comparison operation.
bytes key = 3;
oneof target_union {
// version is the version of the given key
int64 version = 4;
// create_revision is the creation revision of the given key
int64 create_revision = 5;
// mod_revision is the last modified revision of the given key.
int64 mod_revision = 6;
// value is the value of the given key, in bytes.
bytes value = 7;
}
}
// From google paxosdb paper:
// Our implementation hinges around a powerful primitive which we call MultiOp. All other database
// operations except for iteration are implemented as a single call to MultiOp. A MultiOp is applied atomically
// and consists of three components:
// 1. A list of tests called guard. Each test in guard checks a single entry in the database. It may check
// for the absence or presence of a value, or compare with a given value. Two different tests in the guard
// may apply to the same or different entries in the database. All tests in the guard are applied and
// MultiOp returns the results. If all tests are true, MultiOp executes t op (see item 2 below), otherwise
// it executes f op (see item 3 below).
// 2. A list of database operations called t op. Each operation in the list is either an insert, delete, or
// lookup operation, and applies to a single database entry. Two different operations in the list may apply
// to the same or different entries in the database. These operations are executed
// if guard evaluates to
// true.
// 3. A list of database operations called f op. Like t op, but executed if guard evaluates to false.
message TxnRequest {
// compare is a list of predicates representing a conjunction of terms.
// If the comparisons succeed, then the success requests will be processed in order,
// and the response will contain their respective responses in order.
// If the comparisons fail, then the failure requests will be processed in order,
// and the response will contain their respective responses in order.
repeated Compare compare = 1;
// success is a list of requests which will be applied when compare evaluates to true.
repeated RequestOp success = 2;
// failure is a list of requests which will be applied when compare evaluates to false.
repeated RequestOp failure = 3;
}
message TxnResponse {
ResponseHeader header = 1;
// succeeded is set to true if the compare evaluated to true or false otherwise.
bool succeeded = 2;
// responses is a list of responses corresponding to the results from applying
// success if succeeded is true or failure if succeeded is false.
repeated ResponseOp responses = 3;
}
// CompactionRequest compacts the key-value store up to a given revision. All superseded keys
// with a revision less than the compaction revision will be removed.
message CompactionRequest {
// revision is the key-value store revision for the compaction operation.
int64 revision = 1;
// physical is set so the RPC will wait until the compaction is physically
// applied to the local database such that compacted entries are totally
// removed from the backend database.
bool physical = 2;
}
message CompactionResponse {
ResponseHeader header = 1;
}
message HashRequest {
}
message HashResponse {
ResponseHeader header = 1;
// hash is the hash value computed from the responding member's key-value store.
uint32 hash = 2;
}
message SnapshotRequest {
}
message SnapshotResponse {
// header has the current key-value store information. The first header in the snapshot
// stream indicates the point in time of the snapshot.
ResponseHeader header = 1;
// remaining_bytes is the number of blob bytes to be sent after this message
uint64 remaining_bytes = 2;
// blob contains the next chunk of the snapshot in the snapshot stream.
bytes blob = 3;
}
message WatchRequest {
// request_union is a request to either create a new watcher or cancel an existing watcher.
oneof request_union {
WatchCreateRequest create_request = 1;
WatchCancelRequest cancel_request = 2;
}
}
message WatchCreateRequest {
// key is the key to register for watching.
bytes key = 1;
// range_end is the end of the range [key, range_end) to watch. If range_end is not given,
// only the key argument is watched. If range_end is equal to '\0', all keys greater than
// or equal to the key argument are watched.
// If the range_end is one bit larger than the given key,
// then all keys with the prefix (the given key) will be watched.
bytes range_end = 2;
// start_revision is an optional revision to watch from (inclusive). No start_revision is "now".
int64 start_revision = 3;
// progress_notify is set so that the etcd server will periodically send a WatchResponse with
// no events to the new watcher if there are no recent events. It is useful when clients
// wish to recover a disconnected watcher starting from a recent known revision.
// The etcd server may decide how often it will send notifications based on current load.
bool progress_notify = 4;
enum FilterType {
// filter out put event.
NOPUT = 0;
// filter out delete event.
NODELETE = 1;
}
// filters filter the events at server side before it sends back to the watcher.
repeated FilterType filters = 5;
// If prev_kv is set, created watcher gets the previous KV before the event happens.
// If the previous KV is already compacted, nothing will be returned.
bool prev_kv = 6;
}
message WatchCancelRequest {
// watch_id is the watcher id to cancel so that no more events are transmitted.
int64 watch_id = 1;
}
message WatchResponse {
ResponseHeader header = 1;
// watch_id is the ID of the watcher that corresponds to the response.
int64 watch_id = 2;
// created is set to true if the response is for a create watch request.
// The client should record the watch_id and expect to receive events for
// the created watcher from the same stream.
// All events sent to the created watcher will attach with the same watch_id.
bool created = 3;
// canceled is set to true if the response is for a cancel watch request.
// No further events will be sent to the canceled watcher.
bool canceled = 4;
// compact_revision is set to the minimum index if a watcher tries to watch
// at a compacted index.
//
// This happens when creating a watcher at a compacted revision or the watcher cannot
// catch up with the progress of the key-value store.
//
// The client should treat the watcher as canceled and should not try to create any
// watcher with the same start_revision again.
int64 compact_revision = 5;
repeated mvccpb.Event events = 11;
}
message LeaseGrantRequest {
// TTL is the advisory time-to-live in seconds.
int64 TTL = 1;
// ID is the requested ID for the lease. If ID is set to 0, the lessor chooses an ID.
int64 ID = 2;
}
message LeaseGrantResponse {
ResponseHeader header = 1;
// ID is the lease ID for the granted lease.
int64 ID = 2;
// TTL is the server chosen lease time-to-live in seconds.
int64 TTL = 3;
string error = 4;
}
message LeaseRevokeRequest {
// ID is the lease ID to revoke. When the ID is revoked, all associated keys will be deleted.
int64 ID = 1;
}
message LeaseRevokeResponse {
ResponseHeader header = 1;
}
message LeaseKeepAliveRequest {
// ID is the lease ID for the lease to keep alive.
int64 ID = 1;
}
message LeaseKeepAliveResponse {
ResponseHeader header = 1;
// ID is the lease ID from the keep alive request.
int64 ID = 2;
// TTL is the new time-to-live for the lease.
int64 TTL = 3;
}
message LeaseTimeToLiveRequest {
// ID is the lease ID for the lease.
int64 ID = 1;
// keys is true to query all the keys attached to this lease.
bool keys = 2;
}
message LeaseTimeToLiveResponse {
ResponseHeader header = 1;
// ID is the lease ID from the keep alive request.
int64 ID = 2;
// TTL is the remaining TTL in seconds for the lease; the lease will expire in under TTL+1 seconds.
int64 TTL = 3;
// GrantedTTL is the initial granted time in seconds upon lease creation/renewal.
int64 grantedTTL = 4;
// Keys is the list of keys attached to this lease.
repeated bytes keys = 5;
}
message Member {
// ID is the member ID for this member.
uint64 ID = 1;
// name is the human-readable name of the member. If the member is not started, the name will be an empty string.
string name = 2;
// peerURLs is the list of URLs the member exposes to the cluster for communication.
repeated string peerURLs = 3;
// clientURLs is the list of URLs the member exposes to clients for communication. If the member is not started, clientURLs will be empty.
repeated string clientURLs = 4;
}
message MemberAddRequest {
// peerURLs is the list of URLs the added member will use to communicate with the cluster.
repeated string peerURLs = 1;
}
message MemberAddResponse {
ResponseHeader header = 1;
// member is the member information for the added member.
Member member = 2;
}
message MemberRemoveRequest {
// ID is the member ID of the member to remove.
uint64 ID = 1;
}
message MemberRemoveResponse {
ResponseHeader header = 1;
}
message MemberUpdateRequest {
// ID is the member ID of the member to update.
uint64 ID = 1;
// peerURLs is the new list of URLs the member will use to communicate with the cluster.
repeated string peerURLs = 2;
}
message MemberUpdateResponse{
ResponseHeader header = 1;
}
message MemberListRequest {
}
message MemberListResponse {
ResponseHeader header = 1;
// members is a list of all members associated with the cluster.
repeated Member members = 2;
}
message DefragmentRequest {
}
message DefragmentResponse {
ResponseHeader header = 1;
}
enum AlarmType {
NONE = 0; // default, used to query if any alarm is active
NOSPACE = 1; // space quota is exhausted
}
message AlarmRequest {
enum AlarmAction {
GET = 0;
ACTIVATE = 1;
DEACTIVATE = 2;
}
// action is the kind of alarm request to issue. The action
// may GET alarm statuses, ACTIVATE an alarm, or DEACTIVATE a
// raised alarm.
AlarmAction action = 1;
// memberID is the ID of the member associated with the alarm. If memberID is 0, the
// alarm request covers all members.
uint64 memberID = 2;
// alarm is the type of alarm to consider for this request.
AlarmType alarm = 3;
}
message AlarmMember {
// memberID is the ID of the member associated with the raised alarm.
uint64 memberID = 1;
// alarm is the type of alarm which has been raised.
AlarmType alarm = 2;
}
message AlarmResponse {
ResponseHeader header = 1;
// alarms is a list of alarms associated with the alarm request.
repeated AlarmMember alarms = 2;
}
message StatusRequest {
}
message StatusResponse {
ResponseHeader header = 1;
// version is the cluster protocol version used by the responding member.
string version = 2;
// dbSize is the size of the backend database, in bytes, of the responding member.
int64 dbSize = 3;
// leader is the member ID which the responding member believes is the current leader.
uint64 leader = 4;
// raftIndex is the current raft index of the responding member.
uint64 raftIndex = 5;
// raftTerm is the current raft term of the responding member.
uint64 raftTerm = 6;
}
message AuthEnableRequest {
}
message AuthDisableRequest {
}
message AuthenticateRequest {
string name = 1;
string password = 2;
}
message AuthUserAddRequest {
string name = 1;
string password = 2;
}
message AuthUserGetRequest {
string name = 1;
}
message AuthUserDeleteRequest {
// name is the name of the user to delete.
string name = 1;
}
message AuthUserChangePasswordRequest {
// name is the name of the user whose password is being changed.
string name = 1;
// password is the new password for the user.
string password = 2;
}
message AuthUserGrantRoleRequest {
// user is the name of the user which should be granted a given role.
string user = 1;
// role is the name of the role to grant to the user.
string role = 2;
}
message AuthUserRevokeRoleRequest {
string name = 1;
string role = 2;
}
message AuthRoleAddRequest {
// name is the name of the role to add to the authentication system.
string name = 1;
}
message AuthRoleGetRequest {
string role = 1;
}
message AuthUserListRequest {
}
message AuthRoleListRequest {
}
message AuthRoleDeleteRequest {
string role = 1;
}
message AuthRoleGrantPermissionRequest {
// name is the name of the role which will be granted the permission.
string name = 1;
// perm is the permission to grant to the role.
authpb.Permission perm = 2;
}
message AuthRoleRevokePermissionRequest {
string role = 1;
string key = 2;
string range_end = 3;
}
message AuthEnableResponse {
ResponseHeader header = 1;
}
message AuthDisableResponse {
ResponseHeader header = 1;
}
message AuthenticateResponse {
ResponseHeader header = 1;
// token is an authorized token that can be used in succeeding RPCs
string token = 2;
}
message AuthUserAddResponse {
ResponseHeader header = 1;
}
message AuthUserGetResponse {
ResponseHeader header = 1;
repeated string roles = 2;
}
message AuthUserDeleteResponse {
ResponseHeader header = 1;
}
message AuthUserChangePasswordResponse {
ResponseHeader header = 1;
}
message AuthUserGrantRoleResponse {
ResponseHeader header = 1;
}
message AuthUserRevokeRoleResponse {
ResponseHeader header = 1;
}
message AuthRoleAddResponse {
ResponseHeader header = 1;
}
message AuthRoleGetResponse {
ResponseHeader header = 1;
repeated authpb.Permission perm = 2;
}
message AuthRoleListResponse {
ResponseHeader header = 1;
repeated string roles = 2;
}
message AuthUserListResponse {
ResponseHeader header = 1;
repeated string users = 2;
}
message AuthRoleDeleteResponse {
ResponseHeader header = 1;
}
message AuthRoleGrantPermissionResponse {
ResponseHeader header = 1;
}
message AuthRoleRevokePermissionResponse {
ResponseHeader header = 1;
}