我正在使用此库 ( https://github.com/odelot/aws-mqtt-websockets ) 设置 IoT 设备以连接到 AWS IoT 服务。我让它工作并且运行良好，但是，我对设备使用 AWS 用户的密钥有一些疑问。
为了设置库，您创建一个仅具有 IoT 权限的 IAM 用户，然后生成密钥和密钥并将其加载到 IoT 设备上。然后，IoT 设备使用该信息通过库连接到 AWS IoT MQTT 服务。
我总是被教导永远不要将密钥放在面向客户端的设备上。所以，我想知道
当我更新我的实例时，我使用 EB 命令行工具。我将我的实例推送到我的 CodeCommit git，然后使用该eb deploy命令部署我的代码。几乎每次我这样做时，我的环境状态都会随着正在运行的实例更改为降级/严重，并给出错误Following services are not running: proxy.它将根据我的自动扩展策略（与运行状况相关）启动更多实例，有时在 2-3 个新实例之后, 我会得到一个“OK”的
我的环境配置为64bit Amazon Linux 2016.09 v2.2.0 running PHP 7.0. 它是平均网络输出的自动负载平衡和自动缩放。t1.micro在Any可用区运行，软件配置如下：日志发布：开启；
允许 URL fopen：开；
显示错误：关闭；
文件根目录：/http/；
最大执行时间：60；
内存限制：256M；
Zlib 输出压缩：关闭；
什么可能导致这种情况？
我一直在 drupal 7.14 和 MediaTemple 之间遇到间歇性问题。具体来说，我收到此错误：
PDOException: SQLSTATE[HY000]: 一般错误: 1205 超出锁定等待超时；尝试重新启动事务：SELECT revision.order_number AS order_number, revision.revision_id AS revision_id, revision.revision_uid AS revision_uid, revision.mail AS mail, revision.status AS status, revision.log AS log, revision.revision_timestamp AS revision_timestamp, revision.revision_hostname AS revision_hostname, revision.data AS data, base.order_id AS order_id, base.type AS type, base.uid AS uid, base.created AS created, base.changed AS changed, base.hostname AS hostname FROM {commerce_order} base INNER加入 {commerce_order_revision} revision ON revision.revision_id = base.revision_id WHERE (base.order_id IN (:db_condition_placeholder_0)) 进行更新；DrupalDefaultEntityController 中的数组（[:db_condition_placeholder_0] => 75）->
我被告知我的 MT 将表的类型更改为 MyISAM，并且他们和 drupal 之间存在问题。（请参阅此处的评论 #23 ）。这并没有解决我的问题。我有一个网格容器，报告和配置如下。具体来说，我担心 MySQL 报告的第 39 行。我该怎么做才能解决这个问题？
MySQL 报告
1 MySQL 5.1.26-rc-5.1.26r uptime 0 0:9:1 Tue May 8 14:50:04 2012
2
3 __ Key _________________________________________________________________
4 Buffer used 0 of 24.00M %Used: 0.00
5 Current 4.49M %Usage: 18.71
6 Write hit 0.00%
7 Read hit 0.00%
8
9 __ Questions ___________________________________________________________
10 Total 23 0.0/s
11 Com_ 17 0.0/s %Total: 73.91
12 COM_QUIT 12 0.0/s 52.17
13 -Unknown 9 0.0/s 39.13
14 DMS 3 0.0/s 13.04
15 Slow 0 0/s 0.00 %DMS: 0.00
16 DMS 3 0.0/s 13.04
17 SELECT 3 0.0/s 13.04 100.00
18 REPLACE 0 0/s 0.00 0.00
19 DELETE 0 0/s 0.00 0.00
20 INSERT 0 0/s 0.00 0.00
21 UPDATE 0 0/s 0.00 0.00
22 Com_ 17 0.0/s 73.91
23 show_status 9 0.0/s 39.13
24 show_variab 3 0.0/s 13.04
25 admin_comma 2 0.0/s 8.70
26
27 __ SELECT and Sort _____________________________________________________
28 Scan 6 0.0/s %SELECT: 200.00
29 Range 0 0/s 0.00
30 Full join 0 0/s 0.00
31 Range check 0 0/s 0.00
32 Full rng join 0 0/s 0.00
33 Sort scan 0 0/s
34 Sort range 0 0/s
35 Sort mrg pass 0 0/s
36
37 __ Query Cache _________________________________________________________
38 Memory usage 17.07k of 12.00M %Used: 0.14
39 Block Fragmnt 100.00%
40 Hits 0 0/s
41 Inserts 1 0.0/s
42 Insrt:Prune 1:1 0/s
43 Hit:Insert 0.00:1
44
45 __ Table Locks _________________________________________________________
46 Waited 0 0/s %Total: 0.00
47 Immediate 19 0.0/s
48
49 __ Tables ______________________________________________________________
50 Open 8 of 1024 %Cache: 0.78
51 Opened 15 0.0/s
52
53 __ Connections _________________________________________________________
54 Max used 1 of 60 %Max: 1.67
55 Total 14 0.0/s
56
57 __ Created Temp ________________________________________________________
58 Disk table 2 0.0/s
59 Table 5 0.0/s
60 File 5 0.0/s
61
62 __ Threads _____________________________________________________________
63 Running 1 of 1
64 Cached 0 of 4 %Hit: 92.86
65 Created 1 0.0/s
66 Slow 0 0/s
67
68 __ Aborted _____________________________________________________________
69 Clients 0 0/s
70 Connects 0 0/s
71
72 __ Bytes _______________________________________________________________
73 Sent 18.31k 33.8/s
74 Received 1.49k 2.8/s
我的 SQL 配置
#
# Base Container
#
[mysqld_safe]
socket = /var/run/mysqld/mysqld.sock
nice = 0
[mysqld]
max_heap_table_size = 8M
skip-name-resolve
open_files_limit = 8000
#
# * Basic Settings
#
user = mysql
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
port = 3306
basedir = /usr
datadir = /var/lib/mysql
tmpdir = /tmp
language = /usr/share/mysql/english
skip-external-locking
bind-address = 0.0.0.0
# For compatibility
old_passwords = 1
back_log=20
max_connections=60
# due to mysql internally considering connections from 'user@host1' as a separate user from 'user@host2', max_user_connections is largely irrelevant in a clustered situation
max_user_connections=16
max_connect_errors=100000
key_buffer_size=24M
max_heap_table_size=4M
read_buffer_size=128K
read_rnd_buffer_size=128K
sort_buffer_size=256K
table_cache=1024
thread_cache_size=4
tmp_table_size=4M
join_buffer_size=4M
wait_timeout=60
thread_concurrency=4
innodb_file_per_table
max_allowed_packet = 16M
thread_stack = 128K
# query cache
query_cache_limit = 1048576
query_cache_size = 12M
query_cache_type = 1
# slow query log
log-slow-queries = /var/log/mysql/mysql-slow.log
long_query_time = 1
[mysqldump]
quick
quote-names
max_allowed_packet = 16M
[mysql]
no-auto-rehash
[isamchk]
key_buffer = 16M
[client]
port = 3306
socket = /var/run/mysqld/mysqld.sock