Commit Graph

1138 Commits

Author SHA1 Message Date
Sean Chittenden e230b3a3b7 Nuke unnecessary comment
See above function comments for details
2016-03-28 13:57:36 -07:00
Sean Chittenden 34a29a2107 Move FIXME comment to the right call site 2016-03-28 13:49:55 -07:00
Sean Chittenden b38d3d71c8 Rename the ConnPoolPinger interface to Pinger 2016-03-28 13:46:01 -07:00
Sean Chittenden d6b4345375 Return error from PingConsulServer
In order to report why a Ping failed, change the signature of PingConsulServers to include an error message.
2016-03-28 13:38:58 -07:00
Sean Chittenden 6c9fb06511 Change the definition of the ServerDetails struct key
Use only the serf Name for now.  Leaving the plumbing for now.
2016-03-28 12:53:19 -07:00
Sean Chittenden 2bcff6bac4 Correct the comment to match reality 2016-03-28 12:32:30 -07:00
Sean Chittenden fc1edea1ef Rename serverCfg to sc for consistency 2016-03-28 12:06:26 -07:00
Sean Chittenden 988b05700d Add a quick length check
Verify that AddServer behaved as expected
2016-03-28 11:38:12 -07:00
Sean Chittenden 7181e42ba8 Switch the order of ServerDetails.String()
It's more natrual to have the network first.  I think I flipped the order accidentally.
2016-03-28 11:37:25 -07:00
Sean Chittenden dca8fd2643 Move rebalance log statement from INFO to DEBUG 2016-03-27 01:32:04 -07:00
Sean Chittenden 180edd8e7b Chase the API bump re: refreshServerRebalanceTimer
If it works in prod, why shouldn't it work in the tests?
2016-03-27 00:04:52 -07:00
Sean Chittenden 9b5dd7a785 Move initialization of the rebalanceTimer to New() 2016-03-27 00:03:48 -07:00
Sean Chittenden 86d1bad541 Add a test for ConnPool.PingConsulServer
Spin up 5x servers, join and ping each server
2016-03-26 23:52:06 -07:00
Sean Chittenden f903005080 Expose ServerManager.ResetRebalanceTimer
Move the rebalance timer from ServerManager.Start's stack to struct ServerManager.  This makes it possible to shuffle during tests without actually waiting >120s.
2016-03-26 23:41:01 -07:00
Sean Chittenden 2ba281bc5a Logging improvements
Comment out noisly loggers for the time being.

Improve the final logging statement to be useful and hint what the next active server for the client is going to be.
2016-03-26 22:41:08 -07:00
Sean Chittenden fab3981b1d Standardize the log message based on the package
This log statement used to belong in the consul package but has since moved to the server manager package.
2016-03-26 22:29:00 -07:00
Sean Chittenden c6d9c42d9f Reduce the error level from Fatal when unit testing 2016-03-26 22:07:09 -07:00
Sean Chittenden 4747cf3cab Start server rebalance task after init'ing Serf
Now that there is no longer an event loop driven directly by Serf, start the ServerManager task after Serf has been setup.  When testing and adjusting timers and timeouts to unreasonably low values, it's possible to tickle a race condition where Serf's NumNodes() would fail because Serf had not been initialized.
2016-03-26 22:04:41 -07:00
Sean Chittenden 2ddf82d9d8 Catch up to a few renames 2016-03-26 19:32:11 -07:00
Sean Chittenden 640ced7c11 Use empty string for addr in ServerDetails.String() 2016-03-26 19:30:04 -07:00
Sean Chittenden e0f29c17cd Guard against a nil ServerDetails.Addr
It's not clear how or why this would ever be nil, but some of the unit tests produce a nil addr.  Be defensive.
2016-03-26 19:29:31 -07:00
Sean Chittenden 2d9982eb27 Proactively ping server before rotation
Before shuffling the server list, proactively ping the next server in the list to establish the connection and verify the remote endpoint is healthy.
2016-03-26 19:28:13 -07:00
Sean Chittenden b3a8e2f115 Factor out the shuffle server 2016-03-26 19:19:04 -07:00
Sean Chittenden 766ddae165 Revise comments re: cycleServer
Improve the comments to discuss what happens presently.  Add a note to consider possibly calling to TestConsulServer proactively.
2016-03-26 18:53:13 -07:00
Sean Chittenden ac1d42e9d8 Comment why the interface is needed: cyclic import 2016-03-26 18:38:35 -07:00
Sean Chittenden a9b3dba05f Add a struct key type for server_details 2016-03-26 17:58:12 -07:00
Sean Chittenden 496f05b561 Add additional checks 2016-03-25 14:40:46 -07:00
Sean Chittenden c18158aac3 Delete the right tag
"role" != "consul"
2016-03-25 14:31:48 -07:00
Sean Chittenden b44554f882 Don't pass in sm, server manager is already in scope
Go closures are implicitly capturing lambdas.
2016-03-25 14:10:09 -07:00
Sean Chittenden 2713899a5b Trim residual complexity from server join notifications
Now that serf node join events are decoupled from rebalancing activities completely, remove the complixity of draining the channel and ensuring only one go routine was rebalancing the server list.

Now that we're no longer initializing a notification channel, we can remove the config load/save from `Start()`
2016-03-25 14:06:35 -07:00
Sean Chittenden b3298ce4c3 Only log in FindServers
In FindServer this is a useful warning hinting why its call failed. RPC returns error and leaves it to the higher level caller to do whatever it wants. As an operator, I'd have the detail necessary to know why the RPC call(s) failed.
2016-03-25 13:58:50 -07:00
Sean Chittenden f024272ab2 Initialize the rebalancce to clientRPCMinReuseDuration
In an earlier version there was a channel to notify when a new server was added, however this has long since been removed.  Just default to the sane value of 2min before the first rebalance calc takes place.

Pointed out by: slackpad
2016-03-25 13:46:18 -07:00
Sean Chittenden 89311a5859 Use range vs for
Returning a new array vs mutating an array in place so we can use range now.
2016-03-25 13:08:08 -07:00
Sean Chittenden 643997623e Comment updates 2016-03-25 13:06:59 -07:00
Sean Chittenden 072f34cf02 Only rotate server list with more than one server
Fantastic observation by slackpad.  This was left over from when there was a boolean for health in the server struct (vs current strategy where we use server position in the list and rely on serf to cleanup the stale members).

Pointed out by: slackpad
2016-03-25 12:54:36 -07:00
Sean Chittenden aadd274a13 Relocate saveServerConfig next to getServerConfig
Requested by: slackpad
2016-03-25 12:41:22 -07:00
Sean Chittenden cf271e7f65 Clarify that ConsulClusterInfo is an interface over serf
An interface was used to break a cyclic import dependency.
2016-03-25 12:38:40 -07:00
Sean Chittenden 973d924ab4 Reword comment after moving code into new packages 2016-03-25 12:34:46 -07:00
Sean Chittenden 78ec9f241d Change initialReblaanaceTimeout to a time.Duration
Pointed out by: @slackpad
2016-03-25 12:34:12 -07:00
Sean Chittenden 328728c88a Negative check: test an invalid condition 2016-03-25 12:22:33 -07:00
Sean Chittenden 22e546ff32 Test to make sure bootstrap is missing 2016-03-25 12:20:12 -07:00
Sean Chittenden 5f035da4f1 Be more Go idiomatic w/ variable names: s/valid/ok/g
Cargo culting is bad, m'kay?

Pointy Hat: sean-
2016-03-25 12:14:24 -07:00
Sean Chittenden e041c3905d Fix stale comment
Pointed out by: @slackpad
2016-03-25 12:00:40 -07:00
Sean Chittenden 45fc7c362e Add a comment for Client serverMgr 2016-03-25 11:59:27 -07:00
Sean Chittenden 5873b7e28e Correct a bogus goimport rewrite for tests 2016-03-23 22:35:49 -07:00
Sean Chittenden dcc64d91c6 Test ServerManager.refreshServerRebalanceTimer
Change the signature so it returns a value so that this can be tested externally with mock data.  See the sample table in TestServerManagerInternal_refreshServerRebalanceTimer() for the rate at which it will back off.  This function is mostly used to not cripple large clusters in the event of a partition.
2016-03-23 22:10:50 -07:00
Sean Chittenden 8e3b3d766d Add a handful more unit tests to the public interface 2016-03-23 22:10:50 -07:00
Sean Chittenden d5f72e8c07 Rename GetNumServers to NumServers()
Matches the style of the rest of the repo
2016-03-23 22:10:50 -07:00
Sean Chittenden 9de9cf90f1 Rename NewServerManger to just New
Follow go style recommendations now that this has been refactored out of the consul package and doesn't need the qualifier in the name.
2016-03-23 22:10:50 -07:00
Sean Chittenden 7faea986a0 Rename FindHealthyServer() to FindServer()
There is no guarantee the server coming back is healthy.  It's apt to be healthy by virtue of its place in the server list, but it's not guaranteed.
2016-03-23 22:10:50 -07:00
Sean Chittenden 18885e3214 cycleServer is a pure function, save the result 2016-03-23 22:10:50 -07:00
Sean Chittenden 4ec9ed4de2 Missed unit test cruft 2016-03-23 22:10:50 -07:00
Sean Chittenden b906e40811 Update comments to reflect reality 2016-03-23 22:10:50 -07:00
Sean Chittenden 1a09a5b2cf Remove additional cruft from ServerManager's channels
No longer needed code.
2016-03-23 22:10:50 -07:00
Sean Chittenden c980d492c6 Emulate a TryLock using atomic.CompareAndSwap
Prevent possible queueing behind serverConfigLock in the event that a server fails on a busy host.
2016-03-23 22:10:50 -07:00
Sean Chittenden 102dcafe76 Make use of interfaces
Use an interface instead of serf.Serf as arg to NewServerManager.  Bonus points for improved testability.

Pointed out by: @slackpad
2016-03-23 22:10:50 -07:00
Sean Chittenden 231768faea Simplify error handling
Rely on Serf for liveliness.  In the event of a failure, simply cycle the server to the end of the list.  If the server is unhealthy, Serf will reap the dead server.

Additional simplifications:

*) Only rebalance servers based on timers, not when a new server is readded to the cluster.
*) Back out the failure count in server_details.ServerDetails
2016-03-23 22:10:50 -07:00
Sean Chittenden 0c519aa90d Unbreak client tests by reverting to original test
Debugging code crept into the actual test and hung out for much longer than it should have.
2016-03-23 22:10:50 -07:00
Sean Chittenden 26e51376d9 Introduce asynchronous management of consul server lists
Instead of blocking the RPC call path and performing a potentially expensive calculation (including a call to `c.LANMembers()`), introduce a channel to request a rebalance.  Some events don't force a reshuffle, instead the extend the duration of the current rebalance window because the environment thrashed enough to redistribute a client's load.
2016-03-23 22:10:50 -07:00
Sean Chittenden 6ed37d1d8d Comment nits 2016-03-23 22:10:50 -07:00
Sean Chittenden c8ab3ae4cb Use saveServerConfig vs atomic.Value.Store(config) 2016-03-23 22:10:50 -07:00
Sean Chittenden 12377e80e6 Commit a handful of refactoring && copy/paste-o fixes 2016-03-23 22:10:50 -07:00
Sean Chittenden c1c17f158b Mutate copies of serverCfg.servers, not original
Removing any ambiguity re: ownership of the mutated server lists is a win for maintenance and debugging.
2016-03-23 22:10:50 -07:00
Sean Chittenden 753766cc5d rebalanceTimer may be nil during initialization
When first starting the server manager, it's possible that the rebalanceTimer in serverConfig will be nil, test accordingly.
2016-03-23 22:10:50 -07:00
Sean Chittenden d0e2792d5c Properly retain a pointer to the rebalanceTimer 2016-03-23 22:10:50 -07:00
Sean Chittenden 62785de865 Cosmetic and various other wordsmithing cleanups 2016-03-23 22:10:50 -07:00
Sean Chittenden 31de4290cf Document the various functions and their locking 2016-03-23 22:10:50 -07:00
Sean Chittenden ffcd939feb Use config convenience method to get config
'cause ELETTHECOMPILERSDOTHEWORK.  I don't need that cluttering up the subconscious with more complexity.
2016-03-23 22:10:50 -07:00
Sean Chittenden ed7fee7a3c Move consul.serverConfig out of the consul package
Relocated to its own package, server_manager.  This now greatly simplifies the RPC() call path and appropriately hides the locking behind the package boundary.  More work is needed to be done here
2016-03-23 22:10:50 -07:00
Sean Chittenden ab80393198 Rename serverConfigMtx to serverConfigLock
Pointed out by: @slackpad
2016-03-23 22:10:50 -07:00
Sean Chittenden 1866d94285 Refactor out the management of Consul servers
Move the management of c.consulServers (fka c.consuls) into consul/server_manager.go.

This commit brings in a background task that proactively manages the server list and:

*) reshuffles the list
*) manages the timer out of the RPC() path
*) uses atomics to detect a server has failed

This is a WIP, more work in testing needs to be completed.
2016-03-23 22:10:50 -07:00
Sean Chittenden 73497f7915 Move consul.serverConfig out of the consul package
Relocated to its own package, server_manager.  This now greatly simplifies the RPC() call path and appropriately hides the locking behind the package boundary.  More work is needed to be done here
2016-03-23 22:10:50 -07:00
Sean Chittenden 2a52d3eb80 Rename serverConfigMtx to serverConfigLock
Pointed out by: @slackpad
2016-03-23 22:10:32 -07:00
Sean Chittenden 49425c5371 Refactor out the management of Consul servers
Move the management of c.consulServers (fka c.consuls) into consul/server_manager.go.

This commit brings in a background task that proactively manages the server list and:

*) reshuffles the list
*) manages the timer out of the RPC() path
*) uses atomics to detect a server has failed

This is a WIP, more work in testing needs to be completed.
2016-03-23 22:09:46 -07:00
Sean Chittenden ebdccf0f35 Move consul.serverConfig out of the consul package
Relocated to its own package, server_manager.  This now greatly simplifies the RPC() call path and appropriately hides the locking behind the package boundary.  More work is needed to be done here
2016-03-23 22:05:29 -07:00
Sean Chittenden b7213d9daa Rename serverConfigMtx to serverConfigLock
Pointed out by: @slackpad
2016-03-23 22:05:05 -07:00
Sean Chittenden e29b8de0a6 Refactor out the management of Consul servers
Move the management of c.consulServers (fka c.consuls) into consul/server_manager.go.

This commit brings in a background task that proactively manages the server list and:

*) reshuffles the list
*) manages the timer out of the RPC() path
*) uses atomics to detect a server has failed

This is a WIP, more work in testing needs to be completed.
2016-03-23 22:03:20 -07:00
Sean Chittenden 3730eaf6df Commit miss re: consuls variable rename 2016-03-23 16:24:29 -07:00
Sean Chittenden b33648ca5c Move consul.serverConfig out of the consul package
Relocated to its own package, server_manager.  This now greatly simplifies the RPC() call path and appropriately hides the locking behind the package boundary.  More work is needed to be done here
2016-03-23 16:16:22 -07:00
Sean Chittenden f3a69c939d Refactor consul.serverParts into server_details.ServerDetails
This may be short-lived, but it also seems like this is going to lead us down a path where ServerDetails is going to evolve into a more powerful package that will encapsulate more behavior behind a coherent API.
2016-03-23 16:15:47 -07:00
Sean Chittenden b3192ca410 Rename serverConfigMtx to serverConfigLock
Pointed out by: @slackpad
2016-03-23 16:15:47 -07:00
Sean Chittenden 82458fa9e8 Handle the case where there are no healthy servers
Pointed out by: @slackpad
2016-03-23 16:15:47 -07:00
Sean Chittenden 09d4c6439c Refactor out the management of Consul servers
Move the management of c.consulServers (fka c.consuls) into consul/server_manager.go.

This commit brings in a background task that proactively manages the server list and:

*) reshuffles the list
*) manages the timer out of the RPC() path
*) uses atomics to detect a server has failed

This is a WIP, more work in testing needs to be completed.
2016-03-23 16:15:47 -07:00
Sean Chittenden 6bda2c007c Add a flag to denote that a server is disabled
A server is not normally disabled, but in the event of an RPC error, we want to mark a server as down to allow for fast failover to a different server.  This value must be an int in order to support atomic operations.

Additionally, this is the preliminary work required to bring up a server in a disabled state.  RPC health checks in the future could mark the server as alive, thereby creating an organic "slow start" feature for Consul.
2016-03-23 16:14:59 -07:00
Sean Chittenden 7de85906c1 Rename `lastServer` to `preferredServer`
Expanding the domain of lastServer beyond RPC() changes the meaning of this variable.  Rename accordingly to match the intent coming in a subsequent commit: a background thread will be in charge of rotating preferredServer.
2016-03-23 16:14:59 -07:00
Sean Chittenden 2949980a64 Warn if serf events have queued up past 80% of the limit
It is theoretically possible that the number of queued serf events can back up.  If this happens, emit a warning message if there are more than 200 events in queue.

Most notably, this can happen if `c.consulServerLock` is held for an "extended period of time".  The probability of anyone ever seeing this log message is hopefully low to nonexistent, but if it happens, the warning message indicating a large number of serf events fired while a lock was held is likely to be helpful (vs serf mysteriously blocking when attempting to add an event to a channel).
2016-03-23 16:14:11 -07:00
Sean Chittenden 2a0c12460d Commit miss re: consuls variable rename 2016-03-23 16:13:49 -07:00
Sean Chittenden 3ac1bcc799 Remove lastRPCTime
This mechanism isn't going to provide much value in the future.  Preemptively reduce the complexity of future work.
2016-03-23 16:13:49 -07:00
Sean Chittenden 72b7856045 Rename c.consuls to c.consulServers
Prep for breaking out maintenance of consuls into a new goroutine.
2016-03-23 16:10:27 -07:00
Sean Chittenden d1ef4ec7e2 Use `rand.Int31n()` to get power of two optimization
In cases where i+1 is a power of two, skip one modulo operation.
2016-03-23 16:00:39 -07:00
James Phillips 92e947dcc3 Gets rid of flaky sort check.
If we get a coordinate then this test will fail, so we only check the
first item in the list, which is deterministic.
2016-03-21 17:30:05 -07:00
James Phillips 265a8d4053 Increases timeouts for coordinate tests.
We take the interval and add the random stagger to it, so 2X is cutting it
too close and the unit tests are often flaky.
2016-03-21 16:44:35 -07:00
James Phillips 13b8ce0adc Merge pull request #1851 from hashicorp/f-ipv6-bind
Allow [::] as a bind address (binds to first public IPv6 address)
2016-03-19 16:16:19 -07:00
James Phillips 18e12aa886 Adds more specific checks for ipv6 addresses. 2016-03-19 16:14:45 -07:00
James Phillips e4ca18089f Removes leader from members and changes name since it's an address. 2016-03-18 17:07:11 -07:00
Sergey Romanov 11b73bb1a5 #735 add information about leader to consul members 2016-03-18 17:05:40 -07:00
Wim 508bc796a8 Allow [::] as a bind address (binds to first public IPv6 address) 2016-03-18 23:59:44 +01:00
Calvin Leung Huang 7215d9bdef Obfuscate token for lookupACL error 2016-03-15 17:16:25 -04:00
James Phillips a9d640c024 Hardens the match interoplator against negative arguments. 2016-03-07 13:32:32 -08:00
James Phillips 63c826c2c0 Adds a comment about the embedded struct. 2016-03-07 10:45:39 -08:00
James Phillips 275c84a0cc Renames "debug" endpoint and structures to "explain". 2016-03-07 10:45:39 -08:00
James Phillips 8493640b09 Adds a prepared query debug endpoint. 2016-03-07 10:45:39 -08:00
James Phillips 918b1ace47 Applies prefix ACL to a catch-all template as a special case. 2016-03-07 10:45:39 -08:00
James Phillips 3c512fc089 Adds a test for the custom prepared query template indexer. 2016-03-07 10:45:39 -08:00
James Phillips 39d3094d50 Adds core query template tests to the state store. 2016-03-07 10:45:39 -08:00
James Phillips 06087633f0 Adds in basic query template lookups and vendors newly-updated memdb as well as improved iradix tree. 2016-03-07 10:45:39 -08:00
James Phillips 142e69befe Adds tests for the low-level template functions. 2016-03-07 10:45:39 -08:00
James Phillips b578fbbfc4 Adds tests for the string visitor. 2016-03-07 10:45:39 -08:00
James Phillips 2a9a5f823e Factors rendering down into the resolve function. 2016-03-07 10:45:39 -08:00
James Phillips 8e25451232 Splits walk functions out from the rest of the template code. 2016-03-07 10:45:39 -08:00
James Phillips fa60d575bf Integrates templates into state store and endpoint (sans tests). 2016-03-07 10:45:39 -08:00
James Phillips 62405110dc Wraps the prepared query to also store the compiled template. 2016-03-07 10:45:39 -08:00
James Phillips 98281be7df Adds basic query template compiler and renderer. 2016-03-07 10:45:39 -08:00
Mike Cowgill 25613895e3 one line schema change to not allow missing for sessions Table node index, Fixes #1774 2016-03-02 21:19:53 -08:00
James Phillips f0150ff5ce Adds missing token redact in the GET path. 2016-02-26 15:59:00 -08:00
James Phillips 48f2089d7f Merge pull request #1757 from hashicorp/f-revert-1667
Reverts server connection rebalancing changes from #1667
2016-02-24 18:07:13 -08:00
James Phillips c75256ac8b Adds a check for users re-submitting the redacted token. 2016-02-24 17:35:26 -08:00
James Phillips 2f7eac8b86 Renames "prepared_query" ACL policy to "query". 2016-02-24 17:02:06 -08:00
James Phillips 3b91618d7d Changes to more idiomatic "ok" pattern for prefix getter. 2016-02-24 16:26:43 -08:00
James Phillips 1c7ee582f9 Renames a unit test. 2016-02-24 16:17:20 -08:00
James Phillips d660311fbb Revert "Merge pull request #1667 from hashicorp/b-redistribute-clients"
This reverts commit 8f30dea4209491ebbe4ef9ab94dd8052d17bdbe9, reversing
changes made to eb27a02956e7e052c0bec6f96a0c0f7f6675f6a6.
2016-02-24 15:38:03 -08:00
James Phillips 54f0b7bbb6 Completes switch of prepared_query ACLs to govern query names. 2016-02-24 01:26:16 -08:00
James Phillips 633c231d67 Creates new "prepared-query" ACL type and new token capture behavior.
Prior to this change, prepared queries had the following behavior for
ACLs, which will need to change to support templates:

1. A management token, or a token with read access to the service being
   queried needed to be provided in order to create a prepared query.

2. The token used to create the prepared query was stored with the query
   in the state store and used to execute the query.

3. A management token, or the token used to create the query needed to be
   supplied to perform and CRUD operations on an existing prepared query.

This was pretty subtle and complicated behavior, and won't work for
templates since the service name is computed at execution time. To solve
this, we introduce a new "prepared-query" ACL type, where the prefix
applies to the query name for static prepared query types and to the
prefix for template prepared query types.

With this change, the new behavior is:

1. A management token, or a token with "prepared-query" write access to
   the query name or (soon) the given template prefix is required to do
   any CRUD operations on a prepared query, or to list prepared queries
   (the list is filtered by this ACL).

2. You will no longer need a management token to list prepared queries,
   but you will only be able to see prepared queries that you have access
   to (you get an empty list instead of permission denied).

3. When listing or getting a query, because it was easy to capture
   management tokens given the past behavior, this will always blank out
   the "Token" field (replacing the contents as <hidden>) for all tokens
   unless a management token is supplied. Going forward, we should
   discourage people from binding tokens for execution unless strictly
   necessary.

4. No token will be captured by default when a prepared query is created.
   If the user wishes to supply an execution token then can pass it in via
   the "Token" field in the prepared query definition. Otherwise, this
   field will default to empty.

5. At execution time, we will use the captured token if it exists with the
   prepared query definition, otherwise we will use the token that's passed
   in with the request, just like we do for other RPCs (or you can use the
   agent's configured token for DNS).

6. Prepared queries with no name (accessible only by ID) will not require
   ACLs to create or modify (execution time will depend on the service ACL
   configuration). Our argument here is that these are designed to be
   ephemeral and the IDs are as good as an ACL. Management tokens will be
   able to list all of these.

These changes enable templates, but also enable delegation of authority to
manage the prepared query namespace.
2016-02-23 17:12:43 -08:00
James Phillips f398e1880e Adds a test for node registration and tagged addresses. 2016-02-07 13:15:22 -08:00
James Phillips f163522f0c Moves tagged wan address to be managed by anti-entropy, not serf. 2016-02-07 13:12:42 -08:00
James Phillips 3f50d2ae7e Adds an FSM persist and restore test for tagged addresses. 2016-02-07 11:36:39 -08:00
James Phillips 79bd1fd4bb Sets up config for more address tags down the road, renames struct members. 2016-02-07 10:37:34 -08:00
Evan Gilman 71cf39b5f8 Use a map for additional node addresses 2016-02-06 23:01:45 -08:00
Evan Gilman e166d2a4c7 Use idiomatic name for wan_addr serf tag 2016-02-06 23:01:45 -08:00
James Phillips 1a828e3927 Store WanAddress during Service/Check sync 2016-02-06 23:01:45 -08:00
Evan Gilman fc61143b46 Store WanAddress during node registration 2016-02-06 23:01:45 -08:00
Evan Gilman 369e501dd5 Store WanAddress on Node 2016-02-06 23:01:45 -08:00
Sean Chittenden fc82b351b8 Use the server's address in debug logging, not the c.lastServer, which may be nil 2016-02-02 15:51:28 -08:00
Sean Chittenden 58225e0ee3 Remove unnecessary check, test was moved further up in scope 2016-02-02 11:13:58 -08:00
Sean Chittenden 6452b498e1 Use panic instead of returning a sentinel UUID values in unit tests 2016-02-01 23:15:19 -08:00
Sean Chittenden ef8bbca48f Continually rebalance client connections
Introduce a low-level background connection expiration mechanism wherein connections will be recycled periodically based on the size and health of the cluster.

For the vast majority of consul users, this will mean an average connection age of 150s.  For 10K node clusters it will take ~3min for clusters to rebalance their connections.  In the pathological case for a 100K cluster where 99K clients are in the minority talking to 1x server it will take ~26min to rebalance all connections.

It's possibe for clients recovering from a parititon to become fixated on a single server until the server or agent is restarted.  This is of particular interest to long-running environments with stable agents, where `allow_stale` is true, and partitions occur periodically.
2016-01-30 17:13:50 -08:00
Sean Chittenden 8a37e76cb0 Use rand.Int31n() vs unconditionally using modulus 2016-01-30 15:47:58 -08:00
Sean Chittenden 727bb42b1d Merge branch 'f-consul-lib' of ssh://github.com/hashicorp/consul into b-redistribute-clients 2016-01-30 15:40:54 -08:00
Sean Chittenden b216d4c11f Rename clientRPCCache to clientRPCConnMaxIdle, change value
Increase the max idle time for agents talking to servers from 30s to 127s in order to allow for the reuse of connections that are being initiated by cron.

127s was chosen as the first prime above 120s (arbitrarily chose to use a prime) with the intent of reusing connections who are used by once-a-minute cron(8) jobs *and* who use a 60s jitter window (e.g. in vixie cron job execution can drift by up to 59s per job, or 119s for a once-a-minute cron job).
2016-01-30 15:27:46 -08:00
Sean Chittenden e83a5b7a70 Reuse the results from gettimeofday(2)...
Inside of a single RPC call, reuse time.Now().
2016-01-30 14:39:17 -08:00
Sean Chittenden c470553b6b Factor out duplicate functions into a lib package
Consolidate code duplication and tests into a single lib package.  Most of these functions were from various **/util.go functions that couldn't be imported due to cyclic imports.  The consul/lib package is intended to be a terminal node in an import DAG and a place to stash various consul-only helper functions.  Pulled in hashicorp/go-uuid instead of consolidating UUID access.
2016-01-29 16:57:45 -08:00
James Phillips 0010b788ed Prevents watches from being orphaned when KVS blocking queries loop. 2016-01-20 07:18:47 -08:00
James Phillips e0ae4878f6 Merge pull request #948 from hashicorp/iface-down-fix
Don't try to bind on address from inactive interface
2016-01-14 17:00:54 -08:00
Ryan Uber e3ac96679e consul: address comments 2016-01-05 09:45:36 -08:00
Ryan Uber 689698eefa consul: disable serf snapshots in dev mode 2015-12-26 20:39:49 -05:00
Ryan Uber ce4cf8a542 consul: dev mode works 2015-12-26 20:19:36 -05:00
James Phillips 533c79bd2b Cleans up some small `go vet` findings. 2015-12-18 22:14:48 -08:00
James Phillips 92531812b6 Adds source address logging on RPC errors. 2015-12-16 14:03:03 -08:00
James Phillips 38bdcc9907 Adds a check to make sure query names can't be registered twice. 2015-12-02 09:04:51 -08:00
Armon Dadgar a033d7aed2 consul: shrink yamux recv buffer on idle streams 2015-11-27 17:20:57 -08:00
James Phillips 0e3f4af4ac Makes all the query ops the correct type. 2015-11-17 09:27:10 -08:00
James Phillips 86bc3db7b3 Returns a zero index for a lookup error case. 2015-11-17 09:25:20 -08:00
James Phillips bc60491890 Removes a useless empty import and fixes some stale comments. 2015-11-17 08:29:20 -08:00
James Phillips f4943c1613 Makes UUID regex case-insensitive. 2015-11-16 22:57:47 -08:00
James Phillips a1e02996e5 Moves conversion of nil slices up to HTTP layer for prepared queries. 2015-11-15 17:06:00 -08:00
James Phillips c032dee945 Adds a paranoia set of the nodes slice to nil. 2015-11-15 17:06:00 -08:00
James Phillips a0211db3b9 Adds a test to ensure we don't return a nil slice. 2015-11-15 17:06:00 -08:00
James Phillips 375312f07a Gets rid of some unused constants. 2015-11-15 17:06:00 -08:00
James Phillips e6ccf5b9ed Returns a 404 from a get or execute of a nonexistent query. 2015-11-15 17:06:00 -08:00
James Phillips c9ef552385 Plumbs the service name back and uses agent-specific TTL settings as a fallback. 2015-11-15 17:06:00 -08:00
James Phillips cad6938474 Adds unit tests for prepared queries and DNS, using existing tests for equivalence. 2015-11-15 17:06:00 -08:00
James Phillips 7762a828d3 Adds query metadata to prepared query execute response. 2015-11-15 17:06:00 -08:00
James Phillips 0c02365bf2 Makes an empty prepared query list an empty slice, not a nil one. 2015-11-15 17:06:00 -08:00
James Phillips 3029906254 Adds a unit test for the new RTT getDatacentersByDistance fn. 2015-11-15 17:06:00 -08:00
James Phillips 697e2f4e71 Completes FSM support for prepared queries. 2015-11-15 17:06:00 -08:00
James Phillips 124410b66c Adds an HTTP endpoint for prepared queries. 2015-11-15 17:06:00 -08:00
James Phillips b209c2afe2 Adds an RPC endpoint injection method for testing. 2015-11-15 17:06:00 -08:00
James Phillips 4051db4e88 Changes Lookup to Get since we don't need it (only Execute does). 2015-11-15 17:06:00 -08:00
James Phillips 095806584d Always increments the failovers counter, even for error-ed DCs. 2015-11-15 17:06:00 -08:00
James Phillips 07361d3e96 Adds test for remote datacenter selection and query logic. 2015-11-15 17:06:00 -08:00
James Phillips 6a1c571a38 Adds a test for the server wrapper. 2015-11-15 17:06:00 -08:00
James Phillips 9428f025f9 Adds tag filter tests. 2015-11-15 17:06:00 -08:00
James Phillips da5cf9cdf2 Adds execute tests for prepared queries. 2015-11-15 17:06:00 -08:00
James Phillips 7c8404df4c Adds status information about failovers to query results. 2015-11-15 17:06:00 -08:00
James Phillips dc517aa288 Removes unused ACL filter. 2015-11-15 17:06:00 -08:00
James Phillips 00ea015770 Adds execute leader forward test for prepared queries. 2015-11-15 17:06:00 -08:00
James Phillips 264e86e533 Adds a leader forwarding case for prepared queries. 2015-11-15 17:06:00 -08:00
James Phillips bb0f136412 Adds tests for query lookup and list endpoints. 2015-11-15 17:06:00 -08:00
James Phillips 495d00c0b8 Adds query parsing unit tests. 2015-11-15 17:06:00 -08:00
James Phillips 72f6c8a261 Adds ACL cases for apply. 2015-11-15 17:06:00 -08:00
James Phillips 76a55eed53 Completes non-ACL version of apply test. 2015-11-15 17:06:00 -08:00
James Phillips bc0fba43d8 Adds lookup and list endpoints and basic end-to-end apply test. 2015-11-15 17:06:00 -08:00
James Phillips 3b3c7c02e4 Checks for valid UUIDs before calling in to index function. 2015-11-15 17:06:00 -08:00
James Phillips ec5249357e Clarifies comment about name vs. ID. 2015-11-15 17:06:00 -08:00
James Phillips 61e6cbc560 Skips unknown DCs during queries and chugs along in the face of errors. 2015-11-15 17:06:00 -08:00
James Phillips 0141438e6c Moves sort to a query-time decision and adds back the limit. 2015-11-15 17:06:00 -08:00
James Phillips 25fac70924 Adds an explicit ACL check that will fail vs. trying other DCs. 2015-11-15 17:06:00 -08:00
James Phillips 347bb847c2 Changes "not" prefix from "~" to "!". 2015-11-15 17:06:00 -08:00
James Phillips 09034a84bd Adds prefix "prepared" to everything prepared query-related. 2015-11-15 17:06:00 -08:00
James Phillips 2183565d83 Adds basic structure for prepared queries (needs tests). 2015-11-15 17:06:00 -08:00
James Phillips 6e7faa6239 Factors code for pulling the sorted list of DCs into a common place. 2015-11-15 17:06:00 -08:00
James Phillips 6a70cb9885 Adds a better shuffle test (similar to DNS). 2015-11-15 17:06:00 -08:00
James Phillips 781f9611e8 Changes structs and state store for prepared queries. 2015-11-15 17:06:00 -08:00
James Phillips 55f49d6e73 Merge pull request #1413 from hashicorp/b-coord-raft-errors
Adds a check for in-band error returns in the coordinate RaftApply.
2015-11-15 17:05:19 -08:00
James Phillips 26cf0a2974 Extends the session TTL max to 24 hours, and adds a warning to the docs. 2015-11-15 16:51:00 -08:00
James Phillips 04dffd7c46 Adds a check for in-band error returns in the coordinate RaftApply. 2015-11-15 16:50:46 -08:00
James Phillips 5b0697fc67 Changes batch update failure to a WARN since it's nbd. 2015-10-29 09:26:24 -07:00
James Phillips eb4bfa3411 Prevents agents from considering Raft information when doing sync checks. 2015-10-28 14:32:00 -07:00
James Phillips 7c44a9b6c9 Fixes a bad error message. 2015-10-28 12:40:47 -07:00
James Phillips 5449096bc2 Adds a check for the minimum version as well. 2015-10-27 15:56:36 -07:00