模拟磁盘故障
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本文档介绍如何使用 Chaosd 模拟磁盘故障。该功能支持通过 dd 工具模拟磁盘读写负载，或通过 dd/fallocate 工具模拟磁盘填充。
使用命令行模式创建实验
本节介绍如何通过命令行模式创建磁盘故障实验。
创建实验前，可运行以下命令查看 Chaosd 支持的磁盘故障类型：
chaosd attack disk -h
结果如下：
disk attack related command
Usage:
chaosd attack disk [command]
Available Commands:
add-payload add disk payload
fill fill disk
Flags:
-h, --help help for disk
Global Flags:
--log-level string the log level of chaosd, the value can be 'debug', 'info', 'warn' and 'error'
Use "chaosd attack disk [command] --help" for more information about a command.
当前 Chaosd 支持创建磁盘读负载实验、磁盘写负载实验和磁盘填充实验。
使用命令行模式模拟磁盘读负载
磁盘读负载模拟是单次操作，无需执行恢复操作。
模拟磁盘读负载的命令
chaosd attack disk add-payload read -h
结果如下：
read payload
Usage:
chaosd attack disk add-payload read [flags]
Flags:
-h, --help help for read
-p, --path string 'path' specifies the location to read data.If path not provided, payload will read from disk mount on "/"
-n, --process-num uint8 'process-num' specifies the number of process work on reading , default 1, only 1-255 is valid value (default 1)
-s, --size string 'size' specifies how many units of data will read from the file path.'unit' specifies the unit of data, support c=1, w=2, b=512, kB=1000, K=1024, MB=1000*1000,M=1024*1024, , GB=1000*1000*1000, G=1024*1024*1024 BYTESexample : 1M | 512kB
Global Flags:
--log-level string the log level of chaosd, the value can be 'debug', 'info', 'warn' and 'error'
模拟磁盘读负载的配置说明
| Configuration item | Abbreviation | Description | Value |
|---|---|---|---|
path | p | Specifies the file path to read the data. If this parameter is not specified, or the parameter value is set to an empty string, Chaosd reads from the virtual disk files mounted in the "/" directory. Depending on the permissions to read the files, you might be required to run this program using certain permissions. | type: string; default: "" |
process-num | n | Specifies the number of concurrently running dd programs to be used. | type: uint8; default: 1; range: 1 to 255 |
size | s | Specifies the volume of data to be read. It is the total size of data that dd reads. | type: string; default: ""; required; legal form: the combination of an integer and a unit. For example, 1M, 512kB. Supported units are c=1, w=2, b=512, kB=1000, K=1024, MB=1000*1000, M=1024*1024, GB=1000*1000*1000, G=1024*1024*1024*1024 BYTE and so on. |
模拟磁盘读负载的示例
chaosd attack disk add-payload read -s 1000G -n 7 -p /dev/zero
结果如下：
andrew@LAPTOP-NUS30NQD:~/chaosd/bin$ ./chaosd attack disk add-payload read -s 1000G -n 7 -p /dev/zero
[2021/05/20 13:54:31.323 +08:00] [INFO] [disk.go:128] ["5242880+0 records in\n5242880+0 records out\n5242880 bytes (5.2 MB, 5.0 MiB) copied, 4.13252 s, 1.3 MB/s\n"]
[2021/05/20 13:54:46.977 +08:00] [INFO] [disk.go:147] ["146285+0 records in\n146285+0 records out\n153390940160 bytes (153 GB, 143 GiB) copied, 15.6513 s, 9.8 GB/s\n"]
[2021/05/20 13:54:47.002 +08:00] [INFO] [disk.go:147] ["146285+0 records in\n146285+0 records out\n153390940160 bytes (153 GB, 143 GiB) copied, 15.6762 s, 9.8 GB/s\n"]
[2021/05/20 13:54:47.004 +08:00] [INFO] [disk.go:147] ["146285+0 records in\n146285+0 records out\n153390940160 bytes (153 GB, 143 GiB) copied, 15.6777 s, 9.8 GB/s\n"]
[2021/05/20 13:54:47.015 +08:00] [INFO] [disk.go:147] ["146285+0 records in\n146285+0 records out\n153390940160 bytes (153 GB, 143 GiB) copied, 15.6899 s, 9.8 GB/s\n"]
[2021/05/20 13:54:47.018 +08:00] [INFO] [disk.go:147] ["146285+0 records in\n146285+0 records out\n153390940160 bytes (153 GB, 143 GiB) copied, 15.6914 s, 9.8 GB/s\n"]
[2021/05/20 13:54:47.051 +08:00] [INFO] [disk.go:147] ["146285+0 records in\n146285+0 records out\n153390940160 bytes (153 GB, 143 GiB) copied, 15.7254 s, 9.8 GB/s\n"]
[2021/05/20 13:54:47.074 +08:00] [INFO] [disk.go:147] ["146285+0 records in\n146285+0 records out\n153390940160 bytes (153 GB, 143 GiB) copied, 15.7487 s, 9.7 GB/s\n"]
Read file /dev/zero successfully, uid: 4bc9b74a-5fe2-4038-b4f2-09ae95b57694
使用命令行模式模拟磁盘写负载
模拟磁盘写负载的命令
chaosd attack disk add-payload write -h
结果如下：
write payload
Usage:
chaosd attack disk add-payload write [flags]
Flags:
-h, --help help for write
-p, --path string 'path' specifies the location to fill data in.If path not provided, payload will write into a temp file, temp file will be deleted after writing
-n, --process-num uint8 'process-num' specifies the number of process work on writing , default 1, only 1-255 is valid value (default 1)
-s, --size string 'size' specifies how many units of data will write into the file path.'unit' specifies the unit of data, support c=1, w=2, b=512, kB=1000, K=1024, MB=1000*1000,M=1024*1024, , GB=1000*1000*1000, G=1024*1024*1024 BYTESexample : 1M | 512kB
Global Flags:
--log-level string the log level of chaosd, the value can be 'debug', 'info', 'warn' and 'error'
模拟磁盘写负载的配置说明
| Configuration item | Abbreviation | Description | Value |
|---|---|---|---|
path | p | Specifies the file path to write the data. If this parameter is not specified, or the parameter value is set to an empty string, a temporary file will be created in the program execution directory. Depending on the permissions to write the files, you might be required to run this program using certain permissions. | type: string; default: "" |
process-num | n | Specifies the number of concurrently running dd programs to be used. | type: uint8; default: 1; range: 1 to 255 |
size | s | Specifies the volume of data to be written. It is the total size of data that dd writes. | type: string; default: ""; required; legal form: the combination of an integer and a unit. For example, 1M, 512kB. Supported units are c=1, w=2, b=512, kB=1000, K=1024, MB=1000*1000, M=1024*1024, GB=1000*1000*1000, G=1024*1024*1024*1024 BYTE and so on. |
模拟磁盘写负载的示例
chaosd attack disk add-payload write -s 2G -n 8
结果如下：
[2021/05/20 14:28:14.452 +08:00] [INFO] [disk.go:128] ["0+0 records in\n0+0 records out\n0 bytes copied, 4.3e-05 s, 0.0 kB/s\n"]
[2021/05/20 14:28:16.793 +08:00] [INFO] [disk.go:147] ["256+0 records in\n256+0 records out\n268435456 bytes (268 MB, 256 MiB) copied, 2.32841 s, 115 MB/s\n"]
[2021/05/20 14:28:16.793 +08:00] [INFO] [disk.go:147] ["256+0 records in\n256+0 records out\n268435456 bytes (268 MB, 256 MiB) copied, 2.3344 s, 115 MB/s\n"]
[2021/05/20 14:28:16.793 +08:00] [INFO] [disk.go:147] ["256+0 records in\n256+0 records out\n268435456 bytes (268 MB, 256 MiB) copied, 2.33312 s, 115 MB/s\n"]
[2021/05/20 14:28:16.793 +08:00] [INFO] [disk.go:147] ["256+0 records in\n256+0 records out\n268435456 bytes (268 MB, 256 MiB) copied, 2.33466 s, 115 MB/s\n"]
[2021/05/20 14:28:16.793 +08:00] [INFO] [disk.go:147] ["256+0 records in\n256+0 records out\n268435456 bytes (268 MB, 256 MiB) copied, 2.33189 s, 115 MB/s\n"]
[2021/05/20 14:28:16.793 +08:00] [INFO] [disk.go:147] ["256+0 records in\n256+0 records out\n268435456 bytes (268 MB, 256 MiB) copied, 2.33752 s, 115 MB/s\n"]
[2021/05/20 14:28:16.793 +08:00] [INFO] [disk.go:147] ["256+0 records in\n256+0 records out\n268435456 bytes (268 MB, 256 MiB) copied, 2.33295 s, 115 MB/s\n"]
[2021/05/20 14:28:16.794 +08:00] [INFO] [disk.go:147] ["256+0 records in\n256+0 records out\n268435456 bytes (268 MB, 256 MiB) copied, 2.3359 s, 115 MB/s\n"]
Write file /home/andrew/chaosd/bin/example255569279 successfully, uid: e66afd86-6f3e-43a0-b161-09447ed84856
使用命令行模式模拟磁盘填充
模拟磁盘填充的命令
chaosd attack disk fill -h
结果如下：
fill disk
Usage:
chaosd attack disk fill [flags]
Flags:
-d, --destroy destroy file after filled in or allocated
-f, --fallocate fill disk by fallocate instead of dd (default true)
-h, --help help for fill
-p, --path string 'path' specifies the location to fill data in.If path not provided, a temp file will be generated and deleted immediately after data filled in or allocated
-c, --percent string 'percent' how many percent data of disk will fill in the file path
-s, --size string 'size' specifies how many units of data will fill in the file path.'unit' specifies the unit of data, support c=1, w=2, b=512, kB=1000, K=1024, MB=1000*1000,M=1024*1024, , GB=1000*1000*1000, G=1024*1024*1024 BYTESexample : 1M | 512kB
Global Flags:
--log-level string the log level of chaosd, the value can be 'debug', 'info', 'warn' and 'error'
模拟磁盘填充的配置说明
| Configuration item | Abbreviation | Description | Value |
|---|---|---|---|
destroy | d | If this parameter is set to true, the fill file is immediately deleted after being filled. | type: bool; default: false |
fallocate | f | If this parameter is set to true, Linux is used to call fallocate to quickly apply for disk space and size must be greater than 0. If this parameter is set to false, Linux is used to call dd to fill disks at a relatively slow pace. | type: bool; default: true |
path | p | Specifies the file path to write the data. If this parameter is not specified, or the parameter value is set to an empty string, a temporary file will be created in the program execution directory. Depending on the permissions to write the files, you might be required to run this program using certain permissions. | type: string; default: "" |
percent | c | Specifies the percentage of disk size to be filled. | type: string; default: ""; positive integer of the uint type is acceptable; You must set one of size or percent (both items cannot be "" at the same time). |
size | s | Specifies the volume of data to be written. | type: string; default: ""; legal form: the combination of an integer and a unit. For example, 1M, 512kB. Supported units are c=1, w=2, b=512, kB=1000, K=1024, MB=1000*1000, M=1024*1024, GB=1000*1000*1000, G=1024*1024*1024*1024 BYTE and so on. You must set one of size or percent (both items cannot be "" at the same time). |
模拟磁盘填充的示例
chaosd attack disk fill -c 50 -d
结果如下：
[2021/05/20 14:30:02.943 +08:00] [INFO] [disk.go:215]
Fill file /home/andrew/chaosd/bin/example623832242 successfully, uid: 097b4214-8d8e-46ad-8768-c3e0d8cbb326
通过服务模式创建实验
本节介绍如何通过服务模式创建磁盘故障实验。
使用服务模式模拟磁盘读负载
磁盘读负载模拟是单次操作，无需执行恢复操作。
模拟磁盘读负载的参数说明
| Parameter | Description | Value |
|---|---|---|
action | Actions of the experiment | Set to "read-payload" |
path | Specifies the file path to read the data. If this parameter is not specified, or the parameter value is set to an empty string, Chaosd reads from the virtual disk files mounted in the "/" directory. Depending on the permissions to read the files, you might be required to run this program using certain permissions. | type: string; default: """ |
payload-process-num | Specifies the number of concurrently running dd programs to be used. | type: uint8; default: 1; range: 1 to 255 |
size | Specifies the volume of data to be read. It is the total size of data that dd reads. | type: string; default: ""; required; legal form: the combination of an integer and a unit. For example, 1M, 512kB. Supported units are c=1, w=2, b=512, kB=1000, K=1024, MB=1000*1000, M=1024*1024, GB=1000*1000*1000, G=1024*1024*1024*1024 BYTE and so on. |
使用服务模式模拟磁盘读负载的示例
curl -X POST 172.16.112.130:31767/api/attack/disk -H "Content-Type:application/json" -d '{"action":"read-payload","path":"/dev/zero", "payload-process-num":7,"size":"1000G"}'
结果如下：
{"status":200,"message":"attack successfully","uid":"a551206c-960d-4ac5-9056-518e512d4d0d"}
使用服务模式模拟磁盘写负载
模拟磁盘写负载的参数说明
| Parameter | Description | Value |
|---|---|---|
action | Actions of the experiment | Set to "write-payload" |
path | Specifies the file path to write the data. If this parameter is not specified, or the parameter value is set to an empty string, a temporary file will be created in the program execution directory. Depending on the permissions to write the files, you might be required to run this program using certain permissions. | type: string; default: "" |
payload-process-num | Specifies the number of concurrently running dd programs to be used. | type: uint8; default: 1; range: 1 to 255 |
size | Specifies the volume of data to be written. It is the total size of data that dd writes. | type: string; default: ""; required; legal form: the combination of an integer and a unit. For example, 1M, 512kB. Supported units are c=1, w=2, b=512, kB=1000, K=1024, MB=1000*1000, M=1024*1024, GB=1000*1000*1000, G=1024*1024*1024*1024 BYTE and so on. |
使用服务模式模拟磁盘写负载的示例
curl -X POST 172.16.112.130:31767/api/attack/disk -H "Content-Type:application/json" -d '{"action":"write-payload","path":"/tmp/test", "payload-process-num":7,"size":"1000G"}'
结果如下：
{"status":200,"message":"attack successfully","uid":"a551206c-960d-4ac5-9056-518e512d4d0d"}
使用服务模式模拟磁盘填充
模拟磁盘填充的参数说明
| Parameter | Description | Value |
|---|---|---|
action | Actions of the experiment | Set to "fill" |
destroy | If this parameter is set to true, the fill file is immediately deleted after being filled. | type: bool; default: false |
fill-by-fallocate | If this parameter is set to true, Chaosd uses Linux to call fallocate to apply for disk space quickly, and you must set size to a value greater than 0. If this parameter is set to false, Chaosd uses Linux to call dd to fill disks at a relatively slow pace. | type: bool; default: true |
path | Specifies the file path to write the data. If this parameter is not specified, or the parameter value is set to an empty string, a temporary file will be created in the program execution directory. Depending on the permissions to write the files, you might be required to run this program using certain permissions. | type: string; default: "" |
percent | Specifies the percentage of disk size to be filled. | type: string; default: ""; positive integer of the uint type is acceptable; You must set one of size or percent (both items cannot be "" at the same time). |
size | Specifies the volume of data to be read. | type: string; default: ""; legal form: the combination of an integer and a unit. For example, 1M, 512kB. Supported units are c=1, w=2, b=512, kB=1000, K=1024, MB=1000*1000, M=1024*1024, GB=1000*1000*1000, G=1024*1024*1024*1024 BYTE and so on. You must set one of size or percent (both items cannot be "" at the same time). |
使用服务模式模拟磁盘填充的示例
curl -X POST 172.16.112.130:31767/api/attack/disk -H "Content-Type:application/json" -d '{"action":"fill","path":"/tmp/test", "fill-by-fallocate":true,"percent":"50"}'
结果如下：
{"status":200,"message":"attack successfully","uid":"a551206c-960d-4ac5-9056-518e512d4d0d"}