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awslogs日志驱动程序发送集装箱日志亚马逊 CloudWatch 的日志。可以通过 AWS 管理控制台或 AWS 开发工具包和命令行工具检索日志条目。
用法
要将awslogs驱动程序用作默认日志记录驱动程序，请将log-driver和log-opt键设置为daemon.json位于 Linux 主机/etc/docker/或 Windows Server 上C:\ProgramData\docker\config\daemon.json的文件中的适当值。有关使用Docker 配置的更多信息daemon.json，请参阅 daemon.json 。以下示例将日志驱动程序awslogs设置为并设置该awslogs-region选项。
{ "log-driver": "awslogs", "log-opts": { "awslogs-region": "us-east-1" }}重新启动 Docker 以使更改生效。
您可以使用以下--log-driver选项来设置特定容器的日志记录驱动程序docker run：
docker run --log-driver=awslogs ...
Amazon CloudWatch Logs 选项
您可以添加日志记录选项以daemon.json设置 Docker 范围的默认值，或者在启动容器时使用--log-opt NAME=VALUE标志指定 Amazon CloudWatch Logs 日志记录驱动程序选项。
awslog-区域
awslogs日志驱动程序发送您的 Docke 日志的特定区域。使用awslogs-region日志选项或AWS_REGION环境变量来设置区域。默认情况下，如果Docker守护进程在 EC2 实例上运行，并且没有设置区域，则驱动程序使用实例的区域。
docker run --log-driver=awslogs --log-opt awslogs-region=us-east-1 ...
awslog-组
您必须指定一个日志组为awslogs日志驱动程序。您可以使用awslogs-group日志选项指定日志组：
docker run --log-driver=awslogs --log-opt awslogs-region=us-east-1 --log-opt awslogs-group=myLogGroup ...
awslog-流
要配置应该使用哪个日志流，您可以指定awslogs-stream日志选项。如果未指定，则将容器标识 ID 用作日志流。
注意：给定日志组内的日志流一次只能由一个容器使用。同时为多个容器使用相同的日志流可能会导致日志记录性能下降。
awslogs-创建-组
如果日志组不存在，日志驱动程序将默认返回错误。但是，您可以将根据awslogs-create-group需要设置true为自动创建日志组。awslogs-create-group选项默认为false。
$ docker run --log-driver=awslogs \ --log-opt awslogs-region=us-east-1 \ --log-opt awslogs-group=myLogGroup \ --log-opt awslogs-create-group=true \ ...
注意：在尝试使用
awslogs-create-group之前，您的 AWS IAM 策略必须包含logs:CreateLogGroup权限。
awslogs-日期时间-格式
awslogs-datetime-format选项定义了Python strftime格式的多行起始模式。日志消息由与模式匹配的行和与模式不匹配的任何后续行组成。因此匹配的行是日志消息之间的分隔符。
使用此格式的用例的一个示例是解析输出，如堆栈转储，否则可能会记录在多个条目中。正确的模式允许它在一个条目中被捕获。
如果awslogs-datetime-format和awslogs-multiline-pattern两者都配置，则此选项始终优先。
注意：多行日志记录会执行所有日志消息的正则表达式解析和匹配，这可能会对日志记录性能产生负面影响。
考虑以下日志流，其中新的日志消息以时间戳开始：
[May 01, 2017 19:00:01] A message was logged[May 01, 2017 19:00:04] Another multiline message was logged Some random messagewith some random words[May 01, 2017 19:01:32] Another message was logged
格式可以表达为一个strftime表达式[%b %d, %Y %H:%M:%S]，并且awslogs-datetime-format可以将该值设置为该表达式：
$ docker run --log-driver=awslogs \ --log-opt awslogs-region=us-east-1 \ --log-opt awslogs-group=myLogGroup \ --log-opt awslogs-datetime-format='[%b %d, %Y %H:%M:%S]' \ ...
这会将日志解析到以下 CloudWatch 日志事件中：
# First event[May 01, 2017 19:00:01] A message was logged # Second event[May 01, 2017 19:00:04] Another multiline message was logged Some random messagewith some random words # Third event[May 01, 2017 19:01:32] Another message was logged
支持以下strftime代码：
代码 | 含义 | 示例 |
|---|---|---|
%a | 平日缩写名称。 | Mon |
％A | 平日全名。 | Monday |
％w | 平日为十进制数字，其中0表示星期日，6表示星期六。 | 0 |
％d | 一个月中的一天作为零填充的十进制数字。 | 08 |
％b | 月缩写名称。 | Feb |
％B | 月份全名。 | February |
％M | 月份作为零填充十进制数字。 | 02 |
％Y | 世纪作为十进制数字。 | 2008 |
％y | 没有世纪的一年是一个零填充的十进制数。 | 08 |
％H | 小时（24小时制）作为零填充十进制数字。 | 19 |
％I | 小时（12小时制）作为零填充的十进制数字。 | 07 |
％p | 上午或下午。 | AM |
％M | 分钟作为零填充的十进制数字。 | 57 |
％S | 其次作为零填充十进制数。 | 04 |
%L | 毫秒为零填充的十进制数字。 | 123 |
％f | 微秒作为零填充的十进制数字。 | 000345 |
%z | UTC偏移量格式为+ HHMM或-HHMM。 | +1300 |
%Z | 时区名称。 | PST |
％j | 一年中的一天为零填充的十进制数字。 | 363 |
awslogs-多-模式
awslogs-multiline-pattern选项使用正则表达式定义多行开始模式。日志消息由与模式匹配的行和与模式不匹配的任何后续行组成。因此匹配的行是日志消息之间的分隔符。
如果awslogs-datetime-format还配置了此选项，则忽略此选项。
注意：多行日志记录对所有日志消息执行正则表达式解析和匹配。这可能会对记录性能产生负面影响。
例如，要处理以下日志流，新的日志消息从模式开始INFO*
考虑以下日志流，其中每条日志消息应以 pattherINFO开头：
INFO A message was logged INFO Another multiline message was logged Some random message INFO Another message was logged
你可以使用^INFO正则表达式：
$ docker run --log-driver=awslogs \ --log-opt awslogs-region=us-east-1 \ --log-opt awslogs-group=myLogGroup \ --log-opt awslogs-multiline-pattern='^INFO' \ ...
这会将日志解析到以下 CloudWatch 日志事件中：
# First event INFO A message was logged # Second event INFO Another multiline message was logged Some random message # Third event INFO Another message was logged
标签
指定tag为选项的替代awslogs-stream选项。tag解释模板标记（例如{{.ID}}，{{.FullID}}或{{.Name}} docker.{{.ID}}）。有关所有支持的模板替换的详细信息，请参阅标记选项文档。
当两个awslogs-stream和tag被指定，提供的awslogs-stream值将覆盖与指定的tag模板。
如果未指定，则将容器标识 ID 用作日志流。
注意：CloudWatch 日志 API 不支持
:日志名称。这可能会导致一些问题时使用{{ .ImageName }}作为标记，因为泊坞窗图像具有格式IMAGE:TAG，如alpine:latest。模板标记可用于获取正确的格式。要获取图像名称和容器ID的前12个字符，可以使用：--log-opt tag='{{ with split .ImageName ":" }}{{join . "_"}}{{end}}-{{.ID}}'输出结果如下所示：alpine_latest-bf0072049c76
证书
您必须向 Docker 守护程序（daemon）提供 AWS 凭证才能使用awslogs日志记录驱动程序。您可以提供这些凭证用AWS_ACCESS_KEY_ID，AWS_SECRET_ACCESS_KEY以及AWS_SESSION_TOKEN环境变量，默认的 AWS 共享的凭证文件（~/.aws/credentials根用户），或（如果正在运行在 Amazon EC2 实例泊坞窗守护进程）的 Amazon EC2 实例配置文件。
凭证必须应用允许logs:CreateLogStream和logs:PutLogEvents采取的操作，如以下示例所示。
{ "Version": "2012-10-17", "Statement": [ { "Action": [ "logs:CreateLogStream", "logs:PutLogEvents" ], "Effect": "Allow", "Resource": "*" } ]}