2018-08-27 第一、二章 搭建容器
传统的OS
1. install centos mini
2. virtualbox 虚机网桥配置：
修改网卡类型为网桥
vi /etc/sysconfig/network-script/ifcfg-enp0s3 add lines below:
HWADDR=08:00:27:2E:8B:3C
BOOTPROTO=static
IPADDR=192.168.0.9
NETMASK=255.255.255.0
GATEWAY=192.168.0.1
DNS1=8.8.8.8
DNS2=4.4.4.4
3. 更改主机名：
hostnamectl set-hostname k8s-centos-mini
4. install docker:
# yum update
# yum install docker
# systemctl enable docker.service
# systemctl start docker.service
5. 查看docker软件包的构成
# rpm -ql docker | more
/etc/docker
/etc/docker/certs.d
/etc/docker/certs.d/redhat.com
/etc/docker/certs.d/redhat.com/redhat-ca.crt
/etc/docker/certs.d/redhat.io
/etc/docker/certs.d/redhat.io/redhat-ca.crt
/etc/docker/certs.d/registry.access.redhat.com
/etc/docker/certs.d/registry.access.redhat.com/redhat-ca.crt
//...... Above, 使centos、redhat能使用REdhat自己的registry，而不仅是Docker Hub Registry（https://registry.hub.docker.com / account:josiejiao）
// PS：对RHEL，docker软件包还安装了/usr/share/rhel/secrets 目录，它们是关于订阅管理文件，将被复制到容器中，所以容器无需消耗额外的订阅
/etc/sysconfig/docker-network --> 用于收集传给docker服务的网络选项
/etc/sysconfig/docker-storage --> 用来改变Docker服务的存储数据的方式的output设置， 默认DOCKER_STORAGE_OPTIONS="--storage-driver overlay2 "
/etc/sysconfig/docker-storage-setup --> --> 用来改变Docker服务的存储数据的方式的input设置, 默认STORAGE_DRIVER=overlay2
// Docker的存储后端可以定义多种：devicemapper, overlay, and overlay2
6. Docker command
attach Attach to a running container
build Build an image from a Dockerfile
commit Create a new image from a container's changes
cp Copy files/folders between a container and the local filesystem
create Create a new container
diff Inspect changes on a container's filesystem
events Get real time events from the server
exec Run a command in a running container
export Export a container's filesystem as a tar archive
history Show the history of an image
images List images
import Import the contents from a tarball to create a filesystem image
info Display system-wide information
inspect Return low-level information on Docker objects
kill Kill one or more running containers
load Load an image from a tar archive or STDIN
login Log in to a Docker registry
logout Log out from a Docker registry
logs Fetch the logs of a container
pause Pause all processes within one or more containers
port List port mappings or a specific mapping for the container
ps List containers
pull Pull an image or a repository from a registry
push Push an image or a repository to a registry
rename Rename a container
restart Restart one or more containers
rm Remove one or more containers
rmi Remove one or more images
run Run a command in a new container
save Save one or more images to a tar archive (streamed to STDOUT by default)
search Search the Docker Hub for images
start Start one or more stopped containers
stats Display a live stream of container(s) resource usage statistics
stop Stop one or more running containers
tag Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE
top Display the running processes of a container
unpause Unpause all processes within one or more containers
update Update configuration of one or more containers
version Show the Docker version information
wait Block until one or more containers stop, then print their exit codes
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精简的专为运行容器的OS
Atomic类 基于rpm的linux发型版构建器
www.projectatomic.io/docs/quickstart
方案1. 云上部署 - qcow2格式的形式
Fedora: https://alt.fedoraproject.org/cloud/， 有适用于opestack 的base cloud的qcow2
Centos https://buildlogs.centos.org/centos/7/isos/x86_64/ ， 有适用于云端的qcow2 CentOS-7-x86_64-AtomicHost-20141129_02.qcow2，通过cloud-init注入配置信息
redhat: 适用于Red hat企业虚拟化平台的qcow2
方案2. 通过宿主机的Vagrant（https://www.vagrantup.com），快速部署启动虚拟机 - Vagrant box镜像
Fedora：https://alt.fedoraproject.org/cloud/， 有适合windows的virtual box版，和Fedora的KVM版
Centos: https://buildlogs.centos.org/centos/7/isos/x86_64/
Redhat: 支持Hyper-V / Vmware的ova/vhd
方案3. 传统ISO安装方式
AtomicHost的维护
实际上，atomic Host上 rpm和yum工具都不能用了
替代 安装： 添加普通容器 实现安装应用， 添加特权容器 实现宿主机系统访问的工具安装
替代 升级： # atomic host upgrade
CoreOS类
https://coreos.com/os/docs/latest/booting-with-iso.html
方案1. live iso 安装
