标签:bad star pause shm 信息 max pup tfs dead
三、docker安装官方地址:https://docs.docker.com/engine/install/centos/
[root@docker ~]# yum remove docker docker-client docker-client-latest docker-common docker-latest docker-latest-logrotate docker-logrotate docker-engine -y
[root@docker ~]# yum install -y yum-utils
[root@docker ~]# yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
[root@docker ~]# yum clean all
[root@docker ~]# yum makecache
[root@docker ~]# yum install docker-ce docker-ce-cli containerd.io -y
[root@docker ~]# systemctl start docker
[root@docker ~]# docker version
[root@docker ~]# docker info
[root@docker ~]# docker run hello-world
[root@docker ~]# cat /etc/docker/daemon.json
{
"registry-mirrors": ["http://xxx.c.163.com"]
}
[root@docker ~]#
[root@docker ~]# systemctl daemon-reload
[root@docker ~]# systemctl restart docker
[root@docker ~]# cat /etc/docker/daemon.json
{
"registry-mirrors": ["https://xxxx.mirror.aliyuncs.com"]
}
[root@docker ~]#
[root@docker ~]# systemctl daemon-reload
[root@docker ~]# systemctl restart docker
docker version #显示docker的版本信息
docker info #显示docker的系统信息
docker --help
任何的博客写的都没有官方文档详细
帮助文档的官方地址:https://docs.docker.com/reference/
[root@docker ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
badwolf/centos httpd 00398159773f 8 days ago 782MB
#解释
REPOSITORY #镜像仓库源
TAG #镜像的标签
IMAGE ID #镜像的ID
CREATED #镜像的创建时间
SIZE #镜像的大小
#可选项:
Options:
-a, --all #列出所有镜像
-q, --quiet #只显示镜像id
[root@docker ~]# docker search mysql
#可选项
Options:
-f, --filter filter #--filter=STARS=100 搜索出来的镜像STARS大于100
[root@docker ~]# docker pull mysql
Using default tag: latest #如果不选择版本,默认下载最新版,docker pull mysql:5.7,版本官方存在即可
latest: Pulling from library/mysql
d51ce1c2e575: Pull complete #分层下载
c2344adc4858: Pull complete
......
Digest: sha256:8b7b328a7ff6de46ef96bcf83af048cb00a1c86282bfca0cb119c84568b4caf6 #签名
Status: Downloaded newer image for mysql:latest
docker.io/library/mysql:latest #真实下载地址
[root@docker ~]#
#指定镜像ID删除
[root@docker ~]# docker rmi -f 镜像id
#删除多个镜像
[root@docker ~]# docker rmi -f 镜像id1 镜像id2 镜像id3 ......
#删除全部镜像
[root@docker ~]# docker rmi -f $(docker images -aq)
#卸载docker
[root@docker ~]# yum remove docker-ce docker-ce-cli containerd.io
说明:下载一个centos来进行测试
[root@docker ~]# docker pull centos:7 #一定要加版本号,最新版的下载可能会有问题,不兼容你的系统
[root@docker ~]# docker run [可选参数] image
#参数列表
--name #容器名字 httpd mysqld tomcat .....
-d #后台运行
-it #使用交互模式运行,进入容器查看内容
-p #指定容器的端口
-p #主机端口:容器端口
-p #容器端口
-p #ip:主机端口:容器端口
-p #容器端口
#案例1:
#启动并进入容器
[root@docker ~]# docker run -it centos:7 /bin/bash
[root@440e3ddc5000 /]# cat /etc/redhat-release
CentOS Linux release 7.8.2003 (Core)
[root@440e3ddc5000 /]# hostname
440e3ddc5000
[root@440e3ddc5000 /]# exit
#案例2
#后台启动
docker run -d centos:7
#问题
#使用-d启动,使用ps检查发现容器停止了,出现这样的问题的原因是容器的启动必须有一个前台进程,否则docker会认为程序已经关闭,所以docker会自动停止
#检查正在运行的容器
[root@docker ~]# docker ps -a
#参数说明
-a #检查所有容器状态
-n=? #显示最近创建的容器
-q #只显示容器编号
exit #容器停止并退出
ctrl +p+q #容器不停止退出
说明:镜像在运行的时候变成容器,所有容器在运行的时候是无法删除镜像的,但是容器在运行状态可以删除容器。
#删除一个容器
[root@docker ~]# docker rm -f 容器id
#删除所有容器
[root@docker ~]# docker rm -f $(docker ps -aq)
[root@docker ~]# docker ps -a -q |xargs rm -f
[root@docker ~]# docker start id
[root@docker ~]# docker stop id
[root@docker ~]# docker kill id
[root@docker ~]# docker logs name/id
#参数说明
-ft #显示日志
--tail +number #要显示的日志条数
#案例1
#持续运行一个容器,并输出指定信息
[root@docker ~]# docker run -d centos:7 /bin/bash -c "while true;do echo hello world;sleep 1; done"
[root@docker ~]# docker logs f723b0ee1be7
#检查尾部10条日志
[root@docker ~]# docker logs -tf --tail 10 f723b0ee1be7
#显示容器里面的进程
[root@docker ~]# docker top name/id
#相当于创建一个新的镜像模板,这个模板里面包含下载的httpd
[root@ed1b2d1b2a8a /]# ping www.baidu.com
[root@ed1b2d1b2a8a /]# yum install -y httpd
[root@ed1b2d1b2a8a /]# exit
[root@docker ~]# docker commit 运行的容器id 新的镜像id
#检查CPU状态
[root@docker ~]# docker stats
#查看容器的元数据
[root@docker ~]# docker run -d centos:7 /bin/bash -c "while true;do echo hello world;sleep 1; done"
[root@docker ~]# docker inspect 5d225d045b80
[
{
"Id": "5d225d045b8012ffcb79eefcc57c3fab474fc451b396dd73e59fc0803b3bdb9c",
"Created": "2020-07-01T03:29:51.099721427Z",
"Path": "/bin/bash",
"Args": [
"-c",
"while true;do echo hello world;sleep 1; done"
],
"State": {
"Status": "running",
"Running": true,
"Paused": false,
"Restarting": false,
"OOMKilled": false,
"Dead": false,
"Pid": 19692,
"ExitCode": 0,
"Error": "",
"StartedAt": "2020-07-01T03:29:51.295193435Z",
"FinishedAt": "0001-01-01T00:00:00Z"
},
"Image": "sha256:b5b4d78bc90ccd15806443fb881e35b5ddba924e2f475c1071a38a3094c3081d",
"ResolvConfPath": "/var/lib/docker/containers/5d225d045b8012ffcb79eefcc57c3fab474fc451b396dd73e59fc0803b3bdb9c/resolv.conf",
"HostnamePath": "/var/lib/docker/containers/5d225d045b8012ffcb79eefcc57c3fab474fc451b396dd73e59fc0803b3bdb9c/hostname",
"HostsPath": "/var/lib/docker/containers/5d225d045b8012ffcb79eefcc57c3fab474fc451b396dd73e59fc0803b3bdb9c/hosts",
"LogPath": "/var/lib/docker/containers/5d225d045b8012ffcb79eefcc57c3fab474fc451b396dd73e59fc0803b3bdb9c/5d225d045b8012ffcb79eefcc57c3fab474fc451b396dd73e59fc0803b3bdb9c-json.log",
"Name": "/cool_driscoll",
"RestartCount": 0,
"Driver": "overlay2",
"Platform": "linux",
"MountLabel": "",
"ProcessLabel": "",
"AppArmorProfile": "",
"ExecIDs": null,
"HostConfig": {
"Binds": null,
"ContainerIDFile": "",
"LogConfig": {
"Type": "json-file",
"Config": {}
},
"NetworkMode": "default",
"PortBindings": {},
"RestartPolicy": {
"Name": "no",
"MaximumRetryCount": 0
},
"AutoRemove": false,
"VolumeDriver": "",
"VolumesFrom": null,
"CapAdd": null,
"CapDrop": null,
"Capabilities": null,
"Dns": [],
"DnsOptions": [],
"DnsSearch": [],
"ExtraHosts": null,
"GroupAdd": null,
"IpcMode": "private",
"Cgroup": "",
"Links": null,
"OomScoreAdj": 0,
"PidMode": "",
"Privileged": false,
"PublishAllPorts": false,
"ReadonlyRootfs": false,
"SecurityOpt": null,
"UTSMode": "",
"UsernsMode": "",
"ShmSize": 67108864,
"Runtime": "runc",
"ConsoleSize": [
0,
0
],
"Isolation": "",
"CpuShares": 0,
"Memory": 0,
"NanoCpus": 0,
"CgroupParent": "",
"BlkioWeight": 0,
"BlkioWeightDevice": [],
"BlkioDeviceReadBps": null,
"BlkioDeviceWriteBps": null,
"BlkioDeviceReadIOps": null,
"BlkioDeviceWriteIOps": null,
"CpuPeriod": 0,
"CpuQuota": 0,
"CpuRealtimePeriod": 0,
"CpuRealtimeRuntime": 0,
"CpusetCpus": "",
"CpusetMems": "",
"Devices": [],
"DeviceCgroupRules": null,
"DeviceRequests": null,
"KernelMemory": 0,
"KernelMemoryTCP": 0,
"MemoryReservation": 0,
"MemorySwap": 0,
"MemorySwappiness": null,
"OomKillDisable": false,
"PidsLimit": null,
"Ulimits": null,
"CpuCount": 0,
"CpuPercent": 0,
"IOMaximumIOps": 0,
"IOMaximumBandwidth": 0,
"MaskedPaths": [
"/proc/asound",
"/proc/acpi",
"/proc/kcore",
"/proc/keys",
"/proc/latency_stats",
"/proc/timer_list",
"/proc/timer_stats",
"/proc/sched_debug",
"/proc/scsi",
"/sys/firmware"
],
"ReadonlyPaths": [
"/proc/bus",
"/proc/fs",
"/proc/irq",
"/proc/sys",
"/proc/sysrq-trigger"
]
},
"GraphDriver": {
"Data": {
"LowerDir": "/var/lib/docker/overlay2/36d2790a2b810dc85ff542cf18b69a9fba643336184c612c82abbf28e9cac771-init/diff:/var/lib/docker/overlay2/abca5eb688f401e6a61dea88c8db1405b0e3d3a4368bc364b3f02972dbcd4764/diff",
"MergedDir": "/var/lib/docker/overlay2/36d2790a2b810dc85ff542cf18b69a9fba643336184c612c82abbf28e9cac771/merged",
"UpperDir": "/var/lib/docker/overlay2/36d2790a2b810dc85ff542cf18b69a9fba643336184c612c82abbf28e9cac771/diff",
"WorkDir": "/var/lib/docker/overlay2/36d2790a2b810dc85ff542cf18b69a9fba643336184c612c82abbf28e9cac771/work"
},
"Name": "overlay2"
},
"Mounts": [],
"Config": {
"Hostname": "5d225d045b80",
"Domainname": "",
"User": "",
"AttachStdin": false,
"AttachStdout": false,
"AttachStderr": false,
"Tty": false,
"OpenStdin": false,
"StdinOnce": false,
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
],
"Cmd": [
"/bin/bash",
"-c",
"while true;do echo hello world;sleep 1; done"
],
"Image": "centos:7",
"Volumes": null,
"WorkingDir": "",
"Entrypoint": null,
"OnBuild": null,
"Labels": {
"org.label-schema.build-date": "20200504",
"org.label-schema.license": "GPLv2",
"org.label-schema.name": "CentOS Base Image",
"org.label-schema.schema-version": "1.0",
"org.label-schema.vendor": "CentOS",
"org.opencontainers.image.created": "2020-05-04 00:00:00+01:00",
"org.opencontainers.image.licenses": "GPL-2.0-only",
"org.opencontainers.image.title": "CentOS Base Image",
"org.opencontainers.image.vendor": "CentOS"
}
},
"NetworkSettings": {
"Bridge": "",
"SandboxID": "ecc4e8e85fb1417884843733bd8fb514a51e61d6c45f8dec852212c6ef67baa1",
"HairpinMode": false,
"LinkLocalIPv6Address": "",
"LinkLocalIPv6PrefixLen": 0,
"Ports": {},
"SandboxKey": "/var/run/docker/netns/ecc4e8e85fb1",
"SecondaryIPAddresses": null,
"SecondaryIPv6Addresses": null,
"EndpointID": "378e0fe1d3c21049be0d2b781f23c55daa70c33ebc220cd81b5d60b4e59af45c",
"Gateway": "172.17.0.1",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"IPAddress": "172.17.0.2",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"MacAddress": "02:42:ac:11:00:02",
"Networks": {
"bridge": {
"IPAMConfig": null,
"Links": null,
"Aliases": null,
"NetworkID": "1393cca089f9866db692381f1f57d9ef4b752522798831ca936a14b96f63afa9",
"EndpointID": "378e0fe1d3c21049be0d2b781f23c55daa70c33ebc220cd81b5d60b4e59af45c",
"Gateway": "172.17.0.1",
"IPAddress": "172.17.0.2",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "02:42:ac:11:00:02",
"DriverOpts": null
}
}
}
}
]
[root@docker ~]#
#进入容器,打开一个新的终端
[root@docker ~]# docker ps -a
[root@docker ~]# docker exec -it 容器id /bin/bash
#进入容器,进入正在执行的进程,不会打开新的进程
[root@docker ~]# docker attach 容器id
[root@docker ~]# docker cp 容器id:容器内路径 目的主机路径
#案例1
#将容器内的文件拷贝出来
[root@docker ~]# docker run -it centos:7 /bin/bash
[root@132e687f8968 ~]# touch /opt/test.txt
[root@132e687f8968 ~]# exit
[root@docker ~]# docker cp 132e687f8968:/opt/test.txt /mnt
[root@docker ~]# ls /mnt/
test.txt
[root@docker ~]#
待补充......
要求:利用docker部署两个nginx,映射端口分别为:8888和9999
拓扑
[root@docker ~]# docker search nginx:1.14
[root@docker ~]# docker pull nginx:1.14
[root@docker ~]# docker run -d --name nginx01 -p 8888:80 nginx:1.14
[root@docker ~]# docker run -d --name nginx02 -p 9999:80 nginx:1.14
[root@docker ~]# docker ps
[root@docker ~]# curl localhost:8888
[root@docker ~]# curl localhost:9999
要求:利用docker部署两个tomcat,映射端口分别为:8081和8082
[root@docker ~]# docker search tomcat:9.0
[root@docker ~]# docker pull tomcat:9.0
[root@docker ~]# docker run -d --name tomcat01 -p 8082:8080 tomcat:9.0
[root@docker ~]# docker run -d --name tomcat02 -p 8082:8080 tomcat:9.0
#docker已经精简了tomcat镜像,默认情况下webapp下面没有项目文件,访问会报错404,但是webabb.dist下面有文件,可以copy过去
[root@docker ~]# docker exec -it tomcat01 /bin/bash
root@d4dfffbd6f22:/usr/local/tomcat# cp -r webapps.dist/* webapps/
[root@docker ~]# curl localhost:8081
[root@docker ~]# curl localhost:8082
[root@docker ~]# docker search elasticsearch:7.6.1
[root@docker ~]# docker pull elasticsearch:7.6.1
#es的运行需要注意一个问题,es本身十分的消耗内存,所以在运行的时候需要指定内存限制,否则可能会导致内存不够用而死机
[root@docker ~]# docker run -d --name elasticsearch01 -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" -e ES_JAVA_OPTS="-Xms1024m -Xmx2048m" elasticsearch:7.6.1
[root@docker ~]# docker stats
[root@docker ~]# curl localhost:9200
{
"name" : "53533d2d3f24",
"cluster_name" : "docker-cluster",
"cluster_uuid" : "WSmV0BPYTv--ig2PftBtag",
"version" : {
"number" : "7.6.1",
"build_flavor" : "default",
"build_type" : "docker",
"build_hash" : "aa751e09be0a5072e8570670309b1f12348f023b",
"build_date" : "2020-02-29T00:15:25.529771Z",
"build_snapshot" : false,
"lucene_version" : "8.4.0",
"minimum_wire_compatibility_version" : "6.8.0",
"minimum_index_compatibility_version" : "6.0.0-beta1"
},
"tagline" : "You Know, for Search"
}
[root@docker ~]#
标签:bad star pause shm 信息 max pup tfs dead
原文地址:https://blog.51cto.com/14539398/2508024