Commit graph

586 commits

Author SHA1 Message Date
Julio Pintos 3b05e175d7 fix link to let's encrypt doc (#8294) 2019-09-23 23:53:11 +05:30
Praveen raj Mani ad75683bde Authorize prometheus endpoint with bearer token (#7640) 2019-09-22 20:27:12 +05:30
Minio Trusted 8dc897b5f5 Update yaml files to latest version RELEASE.2019-09-18T21-55-05Z 2019-09-18 22:02:41 +00:00
Aditya Manthramurthy 696f4ceee2 Add notes on configuring LDAP STS with Microsoft Active Directory (#8260) 2019-09-17 17:21:37 -07:00
Aditya Manthramurthy dfa1b417a8 Update comments in ldap example client code (#8257) 2019-09-18 01:59:31 +05:30
poornas 76df027264 Allow caching only in gateway mode. (#8232)
This PR changes cache on PUT behavior to background fill the cache
after PutObject completes. This will avoid concurrency issues as in #8219.

Added cleanup of partially filled cache to prevent cache corruption
- Fixes #8208
2019-09-17 02:54:04 +05:30
k-tipp 208efb843b Update Kafka notification example doc (#8212) 2019-09-16 19:24:55 +05:30
Klaus Post ddea0bdf11 Concurrent CSV parsing and reduce S3 select allocations (#8200)
```
CSV parsing, BEFORE:
BenchmarkReaderBasic-12         	    2842	    407533 ns/op	  397860 B/op	     957 allocs/op
BenchmarkReaderReplace-12       	    2718	    429914 ns/op	  397844 B/op	     957 allocs/op
BenchmarkReaderReplaceTwo-12    	    2718	    435556 ns/op	  397855 B/op	     957 allocs/op
BenchmarkAggregateCount_100K-12    	     171	   6798974 ns/op	16667102 B/op	  308077 allocs/op
BenchmarkAggregateCount_1M-12    	      19	  65657411 ns/op	168057743 B/op	 3146610 allocs/op
BenchmarkSelectAll_10M-12    	       1	20882119900 ns/op	2758799896 B/op	41978762 allocs/op

CSV parsing, AFTER:
BenchmarkReaderBasic-12         	    3721	    312549 ns/op	  101920 B/op	     338 allocs/op
BenchmarkReaderReplace-12       	    3776	    318810 ns/op	  101993 B/op	     340 allocs/op
BenchmarkReaderReplaceTwo-12    	    3610	    330967 ns/op	  102012 B/op	     341 allocs/op
BenchmarkAggregateCount_100K-12    	     295	   4149588 ns/op	 3553623 B/op	  103261 allocs/op
BenchmarkAggregateCount_1M-12    	      30	  37746503 ns/op	33827931 B/op	 1049435 allocs/op
BenchmarkSelectAll_10M-12    	       1	17608495800 ns/op	1416504040 B/op	21007082 allocs/op

~ benchcmp old.txt new.txt
benchmark                           old ns/op       new ns/op       delta
BenchmarkReaderBasic-12             407533          312549          -23.31%
BenchmarkReaderReplace-12           429914          318810          -25.84%
BenchmarkReaderReplaceTwo-12        435556          330967          -24.01%
BenchmarkAggregateCount_100K-12     6798974         4149588         -38.97%
BenchmarkAggregateCount_1M-12       65657411        37746503        -42.51%
BenchmarkSelectAll_10M-12           20882119900     17608495800     -15.68%

benchmark                           old allocs     new allocs     delta
BenchmarkReaderBasic-12             957            338            -64.68%
BenchmarkReaderReplace-12           957            340            -64.47%
BenchmarkReaderReplaceTwo-12        957            341            -64.37%
BenchmarkAggregateCount_100K-12     308077         103261         -66.48%
BenchmarkAggregateCount_1M-12       3146610        1049435        -66.65%
BenchmarkSelectAll_10M-12           41978762       21007082       -49.96%

benchmark                           old bytes      new bytes      delta
BenchmarkReaderBasic-12             397860         101920         -74.38%
BenchmarkReaderReplace-12           397844         101993         -74.36%
BenchmarkReaderReplaceTwo-12        397855         102012         -74.36%
BenchmarkAggregateCount_100K-12     16667102       3553623        -78.68%
BenchmarkAggregateCount_1M-12       168057743      33827931       -79.87%
BenchmarkSelectAll_10M-12           2758799896     1416504040     -48.66%
```

```
BenchmarkReaderHuge/97K-12         	    2200	    540840 ns/op	 184.32 MB/s	 1604450 B/op	     687 allocs/op
BenchmarkReaderHuge/194K-12        	    1522	    752257 ns/op	 265.04 MB/s	 2143135 B/op	    1335 allocs/op
BenchmarkReaderHuge/389K-12        	    1190	    947858 ns/op	 420.69 MB/s	 3221831 B/op	    2630 allocs/op
BenchmarkReaderHuge/778K-12        	     806	   1472486 ns/op	 541.61 MB/s	 5201856 B/op	    5187 allocs/op
BenchmarkReaderHuge/1557K-12       	     426	   2575269 ns/op	 619.36 MB/s	 9101330 B/op	   10233 allocs/op
BenchmarkReaderHuge/3115K-12       	     286	   4034656 ns/op	 790.66 MB/s	12397968 B/op	   16099 allocs/op
BenchmarkReaderHuge/6230K-12       	     172	   6830563 ns/op	 934.05 MB/s	16008416 B/op	   26844 allocs/op
BenchmarkReaderHuge/12461K-12      	     100	  11409467 ns/op	1118.39 MB/s	22655163 B/op	   48107 allocs/op
BenchmarkReaderHuge/24922K-12      	      66	  19780395 ns/op	1290.19 MB/s	35158559 B/op	   90216 allocs/op
BenchmarkReaderHuge/49844K-12      	      34	  37282559 ns/op	1369.03 MB/s	60528624 B/op	  174497 allocs/op
```
2019-09-13 14:18:35 -07:00
Minio Trusted 3d65dc8d94 Update yaml files to latest version RELEASE.2019-09-11T19-53-16Z 2019-09-11 19:59:05 +00:00
Nitish Tiwari 432cb38dbd Add reference to MinIO operator in Kubernetes docs (#8098) 2019-09-10 11:37:31 -07:00
Aditya Manthramurthy a0456ce940 LDAP STS API (#8091)
Add LDAP based users-groups system

This change adds support to integrate an LDAP server for user
authentication. This works via a custom STS API for LDAP. Each user
accessing the MinIO who can be authenticated via LDAP receives
temporary credentials to access the MinIO server.

LDAP is enabled only over TLS.

User groups are also supported via LDAP. The administrator may
configure an LDAP search query to find the group attribute of a user -
this may correspond to any attribute in the LDAP tree (that the user
has access to view). One or more groups may be returned by such a
query.

A group is mapped to an IAM policy in the usual way, and the server
enforces a policy corresponding to all the groups and the user's own
mapped policy.

When LDAP is configured, the internal MinIO users system is disabled.
2019-09-10 04:42:29 +05:30
Minio Trusted 5bde31d021 Update yaml files to latest version RELEASE.2019-09-05T23-24-38Z 2019-09-05 23:30:40 +00:00
Nitish Tiwari 496fba3e9a
Return 200 OK for liveness checks while distributed cluster starts (#8176)
With this PR, liveness check responds with 200 OK with "server-not-
initialized" header while objectLayer gets initialized. The header
is removed as objectLayer is initialized. This is to allow
MinIO distributed cluster to get started when running on an
orchestration platforms like Docker Swarm.

This PR also updates sample Swarm yaml files to use correct values
for healthcheck fields.

Fixes #8140
2019-09-05 14:50:56 +05:30
Harshavardhana 0772438125
Update orchestration docs to use ellipses syntax (#8153) 2019-09-01 10:02:15 -07:00
Minio Trusted daa57e8e5a Update yaml files to latest version RELEASE.2019-08-29T00-25-01Z 2019-08-29 00:30:50 +00:00
poornas 48bc3f1d53 Allow cached content to be encrypted (#8001)
If MINIO_CACHE_ENCRYPTION_MASTER_KEY is set,
automatically encrypt all cached content on disk.
2019-08-23 10:13:22 -07:00
Dee Koder 4f3c9d7677
Update doc with Object Tagging not supported (#8116) 2019-08-21 16:10:59 -07:00
Minio Trusted de736f2864 Update yaml files to latest version RELEASE.2019-08-21T19-40-07Z 2019-08-21 19:46:01 +00:00
Nitish Tiwari e5fb6294a7 Remove healthcheck script for Docker image (#8095)
There are multiple possibilities for running MinIO within
a container e.g. configurable address, non-root user etc.
This makes it difficult to identify actual IP / Port to
use to check healthcheck status from within a container.

It is simpler to use external healthcheck mechanisms
like healthcheck command in docker-compose to check
for MinIO health status. This is similar to how checks
work in Kubernetes as well.

This PR removes the healthcheck script used inside
Docker container and ad documentation on how to
use docker-compose based healthcheck mechanism.
2019-08-17 12:44:04 -07:00
Harshavardhana cebeca3075 Fix multi-user doc to reflect the latest change 2019-08-14 14:12:23 -07:00
Minio Trusted 26640033b0 Update yaml files to latest version RELEASE.2019-08-14T20-37-41Z 2019-08-14 20:42:16 +00:00
kannappanr bc79b435a2 Doc: Fix PutObject API known limitations text (#7704) 2019-08-13 08:50:43 -07:00
Harshavardhana 8ce424bacd Enhance audit logging to capture responseTimes (#8067)
Audit logging requires to have

- timeToFirstByte
- timeToResponse

timing information
2019-08-12 20:32:34 -07:00
Cary FitzHugh a0715f3b59 Adding Notes on Swarm Network Aliases (#8054) 2019-08-10 21:25:01 +05:30
Harshavardhana 5a28ef0d47 Bump readiness check upto 10000 go-routines (#8057)
Most of our current workloads reach this value
regularly, it doesn't make sense to keep 1000
go-routine limit.
2019-08-10 18:13:14 +05:30
poornas 3385bf3da8 Rewrite cache implementation to cache only on GET (#7694)
Fixes #7458
Fixes #7573 
Fixes #7938 
Fixes #6934
Fixes #6265 
Fixes #6630 

This will allow the cache to consistently work for
server and gateways. Range GET requests will
be cached in the background after the request
is served from the backend.

- All cached content is automatically bitrot protected.

- Avoid ETag verification if a cache-control header
is set and the cached content is still valid.

- This PR changes the cache backend format, and all existing
content will be migrated to the new format. Until the data is
migrated completely, all content will be served from the backend.
2019-08-09 17:09:08 -07:00
Anis Elleuch 1ce8d2c476 Add bucket lifecycle expiry feature (#7834) 2019-08-09 10:02:41 -07:00
Harshavardhana d759a7ce99
Fix time formatting of Expiration field in STS (#8043)
Without explicit conversion to UTC() from Unix
time the zone information is lost, this leads
to XML marshallers marshaling the time into
a wrong format.

This PR fixes the compatibility issue with AWS STS
API by keeping Expiration format close to ISO8601
or RFC3339

Fixes #8041
2019-08-08 15:44:57 -07:00
Harshavardhana 9ee619ea14 Remove deprecated ENVs 2019-08-07 18:57:38 -07:00
Minio Trusted 55b385beee Update yaml files to latest version RELEASE.2019-08-07T01-59-21Z 2019-08-07 02:05:41 +00:00
Andreas Auernhammer a6f4cf61f2 add UpdateKey method to KMS interface (#7974)
This commit adds a new method `UpdateKey` to the KMS
interface.

The purpose of `UpdateKey` is to re-wrap an encrypted
data key (the key generated & encrypted with a master key by e.g.
Vault).
For example, consider Vault with a master key ID: `master-key-1`
and an encrypted data key `E(dk)` for a particular object. The
data key `dk` has been generated randomly when the object was created.
Now, the KMS operator may "rotate" the master key `master-key-1`.
However, the KMS cannot forget the "old" value of that master key
since there is still an object that requires `dk`, and therefore,
the `D(E(dk))`.
With the `UpdateKey` method call MinIO can ask the KMS to decrypt
`E(dk)` with the old key (internally) and re-encrypted `dk` with
the new master key value: `E'(dk)`.

However, this operation only works for the same master key ID.
When rotating the data key (replacing it with a new one) then
we perform a `UnsealKey` operation with the 1st master key ID
and then a `GenerateKey` operation with the 2nd master key ID.

This commit also updates the KMS documentation and removes
the `encrypt` policy entry (we don't use `encrypt`) and
add a policy entry for `rewarp`.
2019-08-01 15:47:47 -07:00
Minio Trusted dfa8835720 Update yaml files to latest version RELEASE.2019-08-01T22-18-54Z 2019-08-01 22:27:41 +00:00
Minio Trusted c301f5882d Update yaml files to latest version RELEASE.2019-07-31T18-57-56Z 2019-07-31 19:06:20 +00:00
Praveen raj Mani b0cea1c0f3 Enable event persistence in AMQP (#7565) 2019-07-25 11:20:24 -07:00
Harshavardhana 6f2b4675fa
Add krb5 support for HDFS gateway (#7933) 2019-07-24 18:05:48 -07:00
Harshavardhana a4ce1daf99 docs: Use --user to start container in non-root (#7966) 2019-07-24 17:35:52 -07:00
Praveen raj Mani 55d4eee6f1 Enable event persistence in MySQL and PostgreSQL (#7629) 2019-07-24 10:18:29 -07:00
Minio Trusted 5b71c21330 Update yaml files to latest version RELEASE.2019-07-24T02-02-23Z 2019-07-24 02:09:19 +00:00
Praveen raj Mani c9349747ca Enable event-persistence in NATS and NATS-Streaming (#7612) 2019-07-23 10:37:25 -07:00
Praveen raj Mani 2b9b907f9c Enable event persistence in Redis (#7601) 2019-07-23 10:22:08 -07:00
Harshavardhana 87e6533cf3 Add some design docs for distributed setup (#7950) 2019-07-23 07:48:10 +05:30
Minio Trusted b058e32348 Update yaml files to latest version RELEASE.2019-07-17T22-54-12Z 2019-07-17 22:59:33 +00:00
Lucas ea66a52ed1 Add KMS master key from Docker secret (#7825) 2019-07-17 20:55:26 +01:00
Harshavardhana 55dd017e62 Deprecate auto detection of container user (#7930)
There is no reliable way to handle fallbacks for
MinIO deployments, due to various command line
options and multiple locations which require
access inside container.

Parsing command line options is tricky to figure
out which is the backend disk etc, we did try
to fix this in implementations of check-user.go
but it wasn't complete and introduced more bugs.

This PR simplifies the entire approach to rather
than running Docker container as non-root by default
always, it allows users to opt-in. Such that they
are aware that that is what they are planning to do.

In-fact there are other ways docker containers can
be run as regular users, without modifying our
internal behavior and adding more complexities.
2019-07-17 19:20:55 +01:00
Harshavardhana a57c747667 Document vault in prod mode instead of dev mode (#7928) 2019-07-16 01:32:15 +01:00
Praveen raj Mani bf278ca36f Enable event persistence in NSQ (#7579) 2019-07-12 10:41:57 +01:00
Praveen raj Mani bba562235b Enable persistent event store in elasticsearch (#7564) 2019-07-12 08:23:20 +05:30
Minio Trusted 2d96745156 Update yaml files to latest version RELEASE.2019-07-10T00-34-56Z 2019-07-10 00:39:45 +00:00
Minio Trusted 22bc15d89b Update yaml files to latest version RELEASE.2019-07-05T21-20-21Z 2019-07-05 21:24:43 +00:00
Praveen raj Mani bb871a7c31 Enable event persistence in webhook (#7614) 2019-07-05 15:21:41 +05:30
iliul a39e810965 docs: Fix dead link of HighwayHash (#7847)
Signed-off-by: Lei Liu <liul.stone@gmail.com>
2019-07-03 14:32:58 -07:00
mizuno-keyence 09103991ea [Bugfix] duplicating flag registration (#7853) 2019-07-03 14:31:19 -07:00
Matthew Wegner 0bcd8abc5c doc: "admin user policy" command typo (#7865)
Under "change user policy", the `mc admin set-policy` command is wrong.  It should be `mc admin user set-policy`.
2019-07-02 11:48:26 -07:00
Minio Trusted 5db60a6c59 Update yaml files to latest version RELEASE.2019-06-27T21-13-50Z 2019-06-27 21:18:52 +00:00
Klaus Post 61229b38f7 Update compression README.md (#7823)
- Snappy is not and RLE compressor, it is LZ77 based.
- Add `xz` as a common file type.
- Add most common media container types.
- Never heard of `application/x-spoon`. Google turns up a blank as well.
- Change link to minio blog post on compression & encryption.
2019-06-23 13:52:58 +05:30
Andreas Auernhammer 219d841496 remove encryption key section for certtool docs (#7820)
This commit removes the encryption key section from
the certool.exe docs because:
 - MinIO does not support any TLS cipher that encrypts
   something with the private key. We only support PFS
   ciphers.
 - The doc comment is not really accurate anyway.
2019-06-21 10:39:02 -07:00
poornas 680fdf6f90 Update doc link (#7814) 2019-06-20 16:49:21 -07:00
Harshavardhana 1af6e8cb72
Add support for session policies in STS APIs (#7747)
This PR adds support for adding session policies
for further restrictions on STS credentials, useful
in situations when applications want to generate
creds for multiple interested parties with different
set of policy restrictions.

This session policy is not mandatory, but optional.

Fixes #7732
2019-06-20 15:28:33 -07:00
Harshavardhana 35c38e4bd8 Add docs regarding trace (#7808) 2019-06-19 14:28:03 -07:00
Minio Trusted e43d3a075c Update yaml files to latest version RELEASE.2019-06-19T18-24-42Z 2019-06-19 18:31:37 +00:00
Harshavardhana 43e0ef4248 Update docs with new settings (#7803) 2019-06-18 17:52:27 -07:00
Minio Trusted 59f7266081 Update yaml files to latest version RELEASE.2019-06-15T23-07-18Z 2019-06-15 23:17:28 +00:00
Harshavardhana 4a4048fe27 Migrate minio etcd config to backend config (#7751)
etcd when used in federated setups, currently
mandates that all clusters should have same
config.json, which is too restrictive and makes
federation a restrictive environment.

This change makes it apparent that each cluster
needs to be independently managed if necessary
from `mc admin info` command line.

Each cluster with in federation can have their
own root credentials and as well as separate
regions. This way buckets get further restrictions
and allows for root creds to be not common
across clusters/data centers.

Existing data in etcd gets migrated to backend
on each clusters, upon start. Once done
users can change their config entries
independently.
2019-06-15 03:07:54 -07:00
Minio Trusted da2887f914 Update yaml files to latest version RELEASE.2019-06-13T01-41-13Z 2019-06-13 01:46:00 +00:00
Harshavardhana a075015293 doc: Merge large bucket with distributed docs (#7761) 2019-06-11 13:44:33 -07:00
Minio Trusted d3a2efbf91 Update yaml files to latest version RELEASE.2019-06-11T00-44-33Z 2019-06-11 00:50:31 +00:00
Harshavardhana 002a205c9c Fix OPA result response handling (#7763)
Also update the document with updated rego policy
and updated OPA agent REST API.

This PR is to fix a regression caused by PR #7637
2019-06-10 17:06:32 -07:00
Harshavardhana 91ceae23d0 Add support for customizable user (#7569) 2019-06-10 20:27:42 +05:30
Harshavardhana cb1566c6e6 S3 Gateway: Handle restricted access credentials (#7757) 2019-06-07 15:49:13 -07:00
Waldemar Quevedo 8b0c86298d Update import for NATS clients (#7743)
Signed-off-by: Waldemar Quevedo <wally@synadia.com>
2019-06-04 11:16:07 +05:30
Minio Trusted df19546cc8 Update yaml files to latest version RELEASE.2019-06-04T01-15-58Z 2019-06-04 01:22:32 +00:00
Minio Trusted 48ffb7731a Update yaml files to latest version RELEASE.2019-06-01T03-46-14Z 2019-06-01 03:52:47 +00:00
Harshavardhana 0c16b1c9a7 Fix docs.min.io linking issues (#7710) 2019-05-30 17:19:25 -07:00
Harshavardhana 2c0b3cadfc Update go mod with sem versions of our libraries (#7687) 2019-05-29 16:35:12 -07:00
Praveen raj Mani 763fce909b Enable event persistence in kafka (#7633) 2019-05-29 13:19:48 -07:00
Harshavardhana cb7f9ba286 Add disaggregated architecture document (#7691)
This document describes how to configure Spark,
Hive to use MinIO as replacement for HDFS.
2019-05-29 08:04:51 +05:30
Scott Edlund f6fd407e47 Add limitation to b2.md (#7680)
The B2 gateway does not implement reporting md5sum as an etag response from PutObject.  Add to Known Limitations.
2019-05-27 21:04:43 -07:00
Minio Trusted 7a02faab72 Update yaml files to latest version RELEASE.2019-05-23T00-29-34Z 2019-05-23 00:35:13 +00:00
Dee Koder e252114f06 Revert "cache: Rewrite to cache only on download (#7575)" (#7684)
This reverts commit a13b58f630.
2019-05-22 14:54:15 -07:00
poornas a13b58f630 cache: Rewrite to cache only on download (#7575)
This will allow cache to consistently work for
server and gateways. Range GET requests will
be cached in the background after the request
is served from the backend.

Fixes: #7458, #7573, #6265, #6630
2019-05-22 08:30:27 +05:30
ebozduman 78be3f8947 Removes the incorrect coverage badge from the docs (#7651) 2019-05-16 12:11:49 +05:30
Praveen raj Mani 998f01fadc Support IPv6 hosts for postgres connections (#7168)
Fixes #7145
2019-05-03 17:31:33 +05:30
Eco 3517f64d20 Clarify server maximums via Federation (#7608)
To eliminate confusion about 32 server limit, clarify that the limit is only per cluster, but that unlimited clusters can be Federated
2019-05-01 16:20:25 -07:00
parnigot ba76cd3268 Minor TLS documentation improvements (#7592)
Added the explicit name for private.key and public.crt
2019-04-29 12:56:34 -07:00
Minio Trusted ab711fe1a2 Update yaml files to latest version RELEASE.2019-04-23T23-50-36Z 2019-04-23 23:55:31 +00:00
Minio Trusted d42496cc74 Update yaml files to latest version RELEASE.2019-04-18T21-44-59Z 2019-04-18 21:52:22 +00:00
Minio Trusted 7686340621 Update yaml files to latest version RELEASE.2019-04-18T01-15-57Z 2019-04-18 01:22:00 +00:00
Harshavardhana 620e462413 Implement S3-HDFS gateway (#7440)
- [x] Support bucket and regular object operations
- [x] Supports Select API on HDFS
- [x] Implement multipart API support
- [x] Completion of ListObjects support
2019-04-17 09:52:08 -07:00
kannappanr 5ecac91a55
Replace Minio refs in docs with MinIO and links (#7494) 2019-04-09 11:39:42 -07:00
Minio Trusted ea052a2a00 Update yaml files to latest version RELEASE.2019-04-09T01-22-30Z 2019-04-09 01:30:27 +00:00
Minio Trusted 082bd5f31f Update yaml files to latest version RELEASE.2019-04-04T18-31-46Z 2019-04-04 18:39:37 +00:00
Harshavardhana 619611933a
Remove policy nesting errors (#7449)
Policy nesting has been supported for a while
now, we should remove references of code and
docs indicating nesting is not allowed anymore.
2019-03-31 08:42:43 -07:00
Minio Trusted 8cf707779c Update yaml files to latest version RELEASE.2019-03-27T22-35-21Z 2019-03-27 22:41:57 +00:00
Minio Trusted 8af45f0135 Update yaml files to latest version RELEASE.2019-03-20T22-38-47Z 2019-03-20 22:49:06 +00:00
poornas a0ee7be050 update link on README (#7361) 2019-03-14 15:18:12 +05:30
Minio Trusted 8377d00574 Update yaml files to latest version RELEASE.2019-03-13T21-59-47Z 2019-03-13 22:06:26 +00:00
Minio Trusted 6387407e79 Update yaml files to latest version RELEASE.2019-03-06T22-47-10Z 2019-03-06 22:56:46 +00:00
Harshavardhana c3ca954684 Implement AssumeRole API for Minio users (#7267)
For actual API reference read here

https://docs.aws.amazon.com/STS/latest/APIReference/API_AssumeRole.html

Documentation is added and updated as well at docs/sts/assume-role.md

Fixes #6381
2019-02-27 17:46:55 -08:00
Minio Trusted d3125857a8 Update yaml files to latest version RELEASE.2019-02-26T19-51-46Z 2019-02-26 19:58:09 +00:00
Praveen raj Mani 78d116c487 Event persistence for MQTT (#7268)
- The events will be persisted in queueStore if `queueDir` is set.
- Else, if queueDir is not set events persist in memory.

The events are replayed back when the mqtt broker is back online.
2019-02-25 18:01:13 -08:00