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The following commit(s) were added to refs/heads/master by this push:
new 53f22e1 ZOOKEEPER-3395: Document individual admin commands in markdown
53f22e1 is described below
commit 53f22e19f977016dc53fffa17180bd025dc50802
Author: Brian Nixon <[email protected]>
AuthorDate: Mon Aug 5 16:43:18 2019 -0700
ZOOKEEPER-3395: Document individual admin commands in markdown
Author: Brian Nixon <[email protected]>
Reviewers: Dinesh Appavoo <[email protected]>, Michael Han
<[email protected]>
Closes #1032 from enixon/admin-docs
---
.../src/main/resources/markdown/zookeeperAdmin.md | 141 ++++++++++++++++++++-
.../apache/zookeeper/server/admin/Commands.java | 2 +-
2 files changed, 140 insertions(+), 3 deletions(-)
diff --git a/zookeeper-docs/src/main/resources/markdown/zookeeperAdmin.md
b/zookeeper-docs/src/main/resources/markdown/zookeeperAdmin.md
index 7a4773f..6154eb7 100644
--- a/zookeeper-docs/src/main/resources/markdown/zookeeperAdmin.md
+++ b/zookeeper-docs/src/main/resources/markdown/zookeeperAdmin.md
@@ -1724,8 +1724,7 @@ Moving forward, Four Letter Words will be deprecated,
please use
connection/session statistics for all connections.
* *dump* :
- Lists the outstanding sessions and ephemeral nodes. This
- only works on the leader.
+ Lists the outstanding sessions and ephemeral nodes.
* *envi* :
Print details about serving environment
@@ -1899,6 +1898,144 @@ The AdminServer is enabled by default, but can be
disabled by either:
Note that the TCP four letter word interface is still available if
the AdminServer is disabled.
+Available commands include:
+
+* *connection_stat_reset/crst*:
+ Reset all client connection statistics.
+ No new fields returned.
+
+* *configuration/conf/config* :
+ Print basic details about serving configuration, e.g.
+ client port, absolute path to data directory.
+
+* *connections/cons* :
+ Information on client connections to server.
+ Note, depending on the number of client connections this operation may be
expensive
+ (i.e. impact server performance).
+ Returns "connections", a list of connection info objects.
+
+* *hash*:
+ Txn digests in the historical digest list.
+ One is recorded every 128 transactions.
+ Returns "digests", a list to transaction digest objects.
+
+* *dirs* :
+ Information on logfile directory and snapshot directory
+ size in bytes.
+ Returns "datadir_size" and "logdir_size".
+
+* *dump* :
+ Information on session expirations and ephemerals.
+ Note, depending on the number of global sessions and ephemerals
+ this operation may be expensive (i.e. impact server performance).
+ Returns "expiry_time_to_session_ids" and "session_id_to_ephemeral_paths"
as maps.
+
+* *environment/env/envi* :
+ All defined environment variables.
+ Returns each as its own field.
+
+* *get_trace_mask/gtmk* :
+ The current trace mask. Read-only version of *set_trace_mask*.
+ See the description of the four letter command *stmk* for
+ more details.
+ Returns "tracemask".
+
+* *initial_configuration/icfg* :
+ Print the text of the configuration file used to start the peer.
+ Returns "initial_configuration".
+
+* *is_read_only/isro* :
+ A true/false if this server is in read-only mode.
+ Returns "read_only".
+
+* *last_snapshot/lsnp* :
+ Information of the last snapshot that zookeeper server has finished saving
to disk.
+ If called during the initial time period between the server starting up
+ and the server finishing saving its first snapshot, the command returns the
+ information of the snapshot read when starting up the server.
+ Returns "zxid" and "timestamp", the latter using a time unit of seconds.
+
+* *leader/lead* :
+ If the ensemble is configured in quorum mode then emits the current leader
+ status of the peer and the current leader location.
+ Returns "is_leader", "leader_id", and "leader_ip".
+
+* *monitor/mntr* :
+ Emits a wide variety of useful info for monitoring.
+ Includes performance stats, information about internal queues, and
+ summaries of the data tree (among other things).
+ Returns each as its own field.
+
+* *observer_connection_stat_reset/orst* :
+ Reset all observer connection statistics. Companion command to *observers*.
+ No new fields returned.
+
+* *ruok* :
+ No-op command, check if the server is running.
+ A response does not necessarily indicate that the
+ server has joined the quorum, just that the admin server
+ is active and bound to the specified port.
+ No new fields returned.
+
+* *set_trace_mask/stmk* :
+ Sets the trace mask (as such, it requires a parameter).
+ Write version of *get_trace_mask*.
+ See the description of the four letter command *stmk* for
+ more details.
+ Returns "tracemask".
+
+* *server_stats/srvr* :
+ Server information.
+ Returns multiple fields giving a brief overview of server state.
+
+* *stats/stat* :
+ Same as *server_stats* but also returns the "connections" field (see
*connections*
+ for details).
+ Note, depending on the number of client connections this operation may be
expensive
+ (i.e. impact server performance).
+
+* *stat_reset/srst* :
+ Resets server statistics. This is a subset of the information returned
+ by *server_stats* and *stats*.
+ No new fields returned.
+
+* *observers/obsr* :
+ Information on observer connections to server.
+ Always available on a Leader, available on a Follower if its
+ acting as a learner master.
+ Returns "synced_observers" (int) and "observers" (list of per-observer
properties).
+
+* *system_properties/sysp* :
+ All defined system properties.
+ Returns each as its own field.
+
+* *voting_view* :
+ Provides the current voting members in the ensemble.
+ Returns "current_config" as a map.
+
+* *watches/wchc* :
+ Watch information aggregated by session.
+ Note, depending on the number of watches this operation may be expensive
+ (i.e. impact server performance).
+ Returns "session_id_to_watched_paths" as a map.
+
+* *watches_by_path/wchp* :
+ Watch information aggregated by path.
+ Note, depending on the number of watches this operation may be expensive
+ (i.e. impact server performance).
+ Returns "path_to_session_ids" as a map.
+
+* *watch_summary/wchs* :
+ Summarized watch information.
+ Returns "num_total_watches", "num_paths", and "num_connections".
+
+* *zabstate* :
+ The current phase of Zab protocol that peer is running and whether it is a
+ voting member.
+ Peers can be in one of these phases: ELECTION, DISCOVERY, SYNCHRONIZATION,
BROADCAST.
+ Returns fields "voting" and "zabstate".
+
+
<a name="sc_dataFileManagement"></a>
### Data File Management
diff --git
a/zookeeper-server/src/main/java/org/apache/zookeeper/server/admin/Commands.java
b/zookeeper-server/src/main/java/org/apache/zookeeper/server/admin/Commands.java
index 725a476..2e2ae37 100644
---
a/zookeeper-server/src/main/java/org/apache/zookeeper/server/admin/Commands.java
+++
b/zookeeper-server/src/main/java/org/apache/zookeeper/server/admin/Commands.java
@@ -123,12 +123,12 @@ public class Commands {
registerCommand(new CnxnStatResetCommand());
registerCommand(new ConfCommand());
registerCommand(new ConsCommand());
+ registerCommand(new DigestCommand());
registerCommand(new DirsCommand());
registerCommand(new DumpCommand());
registerCommand(new EnvCommand());
registerCommand(new GetTraceMaskCommand());
registerCommand(new InitialConfigurationCommand());
- registerCommand(new DigestCommand());
registerCommand(new IsroCommand());
registerCommand(new LastSnapshotCommand());
registerCommand(new LeaderCommand());
