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很惭愧，就做了一点微小的工作

Dash

ThinkingOnReligion

Jan 24, 2018
Technology

/images/2018_01_24_12_16_18_607x379.jpg

一幅题为《宗教的本质》的漫画。

本来想讽刺几句的，后面想想没有必要。也许那个砍了苹果树的人，他祈求的是芒果呢？而芒果是不能生长在温带或者寒带地域的。

宗教有其正面的意义。大多数人在世间，难免会有脆弱的时候，于是祈求于神灵。而后更加勇敢的去面对现实，最终得到了他梦寐以求的梨子，或是芒果。

从这种意义上来说，宗教也未尝不是好事一桩呀！?

kismaticDeployment

Jan 23, 2018
Technology

环境准备

三台机器(可为虚拟机或物理机):

aptly部署节点(部署完毕后可关机): 192.192.189.110
镜像仓库部署节点(部署完毕后可关机): 192.192.189.111
k8s节点机: 192.192.189.125

操作系统: 节点机，安装Ubuntu16.04， 这里我们采用Base镜像的方式，即时启动一台虚拟机，首先更改其用户名/密码配置及host文件:

# passwd
输入想输入的密码
# vim /etc/ssh/sshd_config
PermitRootLogin yes
# systemctl restart sshd
# reboot
# vim /etc/apt/sources.list
deb http://192.192.189.110	xenial main
deb http://192.192.189.110	kubernetes-xenial main
deb [arch=amd64] http://192.192.189.110	xenial stable
# cat mykey.asc | apt-key add -
# vim /etc/hosts
192.192.189.111	mirror.xxxxxx.com

说明： 上述过程中的mykey.asc来自于aptly服务器， /etc/apt/sources.list里的IP地址为aptly服务器的IP地址。

由上述修改过的基础镜像创建出实际的虚拟机可用镜像:

# qemu-img create -f qcow2 -b Base/Ubuntu1604_base.qcow2 RHPT.qcow2

创建一台虚拟机，桥接模式，16核，64G内存：

/images/2018_01_23_11_56_06_398x255.jpg

配置桥接模式:

/images/2018_01_23_11_58_23_579x263.jpg

配置IP地址/子网/网关等:

/images/2018_01_23_12_11_43_351x258.jpg

另外的一些优化配置在这里不详细提到。

注意: registry-mirror机器是CentOS7环境, 相应镜像中的IP地址修改如图:

/images/2018_01_23_12_15_09_537x276.jpg

kismatic部署

在原有的配置中，直接拷贝一个出来:

# cp -r ubuntuone RongHePingTai
# cd RongHePingTai
# rm -rf generated
# cp kismatic-cluster.yaml kismatic-cluster.yaml.back
# vim kismatic-cluster.yaml
这里作相应的修改，修改过的文件不详细列举

安装过程:

# ./kismatic install apply

安装过程大约需要10分钟，耐心等候。

配置

本地工具配置

配置本地工具helm和kubectl:

# cp kubectl /usr/bin
# mkdir -p ~/.kube
# cp generated/kubeconfig ~/.kube/config
# cp helm /usr/bin/
# kubectl version

host-path存储配置

在本地的initial/k8s-hostpath-provisioner目录下，上传两个tar文件到k8s节点机，load， 而后执行:

# cd examples
# # kubectl create -f sa.yaml -f cluster-roles.yaml -f cluster-role-bindings.yaml -f ds.yaml
# kubectl get ds -n kube-system | grep hostpath
hostpath-provisioner   0         0         0         0            0           nailgun.name/hostpath=enabled   16s

定义节点ubuntu为可以部署hostPath volumes的节点, 并检查label是否被设置成功:

# kubectl get nodes
NAME      STATUS    ROLES     AGE       VERSION
ubuntu    Ready     master    7d        v1.9.0
# kubectl label node ubuntu nailgun.name/hostpath=enabled
node "ubuntu" labeled
# kubectl get nodes ubuntu --show-labels
NAME      STATUS    ROLES     AGE       VERSION   LABELS
ubuntu    Ready     master    7d        v1.9.0    beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kismatic/cni-provider=calico,kismatic/kube-proxy=true,kubernetes.io/hostname=ubuntu,nailgun.name/hostpath=enabled,node-role.kubernetes.io/master=

在节点上注明可用的存储：

# kubectl annotate node ubuntu hostpath.nailgun.name/ssd=/data
node "ubuntu" annotated

接着创建sc(StorageClass), 并检查之:

# kubectl create -f sc.yaml
storageclass "local-ssd" created
# kubectl get sc
NAME                  PROVISIONER             AGE
local-ssd (default)   nailgun.name/hostpath   10s

nginx-ingress controller

运行如下命令部署之:

# cd initial/nginx-ingress-images
上传tar文件至k8s工作节点上，手动load之
# cd initial/nginx-ingress
# helm install --name "ingressenter" .

运行后截图如下:

/images/2018_01_23_14_17_47_857x99.jpg

monocular(可选)

上传镜像，并安装之:

# cd monocular-images
将所有的image上传到k8s节点上，安装之。

安装monocular charts:

# cd initial/monocular
# helm install --name "xxxxxxx" .

安装完毕后：

/images/2018_01_23_14_49_05_822x700.jpg

Combine2Apps

Jan 22, 2018
Technology

AIM

Combine the tomcat and oracle db apps.

tomcat -> war -> oracleDB.

Directory Stucture

/images/2018_01_22_16_53_27_321x492.jpg

values.yaml definition for oracle db:

oracledb:
  enabled: true

requirements.yaml:

requirements.yaml 
dependencies:
- name: oracledb
  version: 0.1.0
  repository: http://192.xxx.xxx.xxx/k8s/oracledb/

Charts.yaml, very simple:

appVersion: 0.1.0
description: Chart for something
home: http://192.xxx.xxx.xxx/k8s/xxx
name: xxx
sources:
  - http://192.xxx.xxx.xxx/k8s/xxx
version: 0.1.0

configmap.yaml:

jdbc.url=jdbc:oracle:thin:@{{ template "oracledb.fullname" . }}:1521/xe\r\njdbc.username=xxx\r\njdbc.password=xxx\r\n\r\n

oracledb definition:

values.yaml

serviceType: ClusterIP

deployment.yaml:

    spec:
      containers:
      - name: {{ template "fullname" . }}
        image: "{{ .Values.image }}"
        imagePullPolicy: {{ .Values.imagePullPolicy | quote }}
        ports:
        - name: oracle
          containerPort: 1521

svc.yaml:

spec:
  type: {{ .Values.serviceType }}
  ports:
  - name: oracle
    port: 1521
    targetPort: oracle
  selector:

tipsonnginxingress

Jan 21, 2018
Technology

Create service

Create a service of nginx via following steps:

# kubectl run my-nginx --image=nginx --replicas=2 --port=80
# kubectl expose deployment my-nginx --port=8080 --target-port=80 --external-ip=x.x.x.168

Verify the service via:

kubectl get svc | grep my-nginx
my-nginx                             ClusterIP      172.20.236.170   10.15.205.200   8080/TCP                     3h

nginx-ingress

Use helm for installing nginx-ingress

# helm fetch stable/nginx-ingress
# tar xzvf nginx-ingress-0.8.23.tgz
# cd nginx-ingress

Made modifications to following items:

controller:

//........

	hostNetwork: true

Because in our environment we have to use hostNetwork for a real ip address mapping.

expose to nginx

Define an yaml via:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: dashboard-kibana-ingress
  namespace: default
spec:
  rules:
  - host: ubuntu.xxxxx.com
    http:
      paths:
      - backend:
          serviceName: my-nginx
          servicePort: 8080

Visit your ubuntu.xxxxx.com, you will get the nginx service webpage.

Config examples

For monocular, do following:

# vim custom-domains.yaml
ingress:
  hosts:
  - monocular.xxxxxx.com
# helm install --name=gou -f custom-domains.yaml .

Now adding monocular.xxxxxx.com into your /etc/hosts file, you could directly access monocular UI using domain name.

For wordpress:

# vim values.yaml
ingress:
  ## Set to true to enable ingress record generation
  enabled: true

  ## The list of hostnames to be covered with this ingress record.
  ## Most likely this will be just one host, but in the event more hosts are needed, this is an array
  hosts:
  - name: wordpress.xxxxxx.com

The same as before, you could use wordpress.xxxxxx.com for accessing wordpress.

WorkingTipsOnOracleDBDockerized

Jan 19, 2018
Technology

Steps

Startup the container and enter it:

# sudo docker create --name oraclexe11g01 -p 49160:22 -p 49161:1521 wnameless/oracle-xe-11g
# sudo docker start oraclexe11g01
# su - oracle

In Container, do following:

oracle@c7edb0017fa8:~$ scp xxxxx@172.17.0.1:/media/sda5/fresh_install.tar.gz .
xxxxx@172.17.0.1's password: 
fresh_install.tar.gz                                                                                                        100%  135KB 135.2KB/s   00:00    
oracle@c7edb0017fa8:~$ tar xzvf fresh_install.tar.gz 
oracle@c7edb0017fa8:~$ cd fresh_install
oracle@c7edb0017fa8:~/fresh_install$ ls
1_create_user_and_tablespace.sql  2_xxxxxxxx_ddl.sql  3_xxxxxxxx_data.sql  4_xxxxxx.sql

Now create user and tablespaces:

oracle@c7edb0017fa8:~/fresh_install$ export NLS_LANG="SIMPLIFIED CHINESE_CHINA.AL32UTF8"
oracle@c7edb0017fa8:~/fresh_install$ cd $ORACLE_HOME/bin
oracle@c7edb0017fa8:~/product/11.2.0/xe/bin$ ./sqlplus / as sysdba

SQL*Plus: Release 11.2.0.2.0 Production on 星期五 1月 19 07:53:32 2018

Copyright (c) 1982, 2011, Oracle.  All rights reserved.


连接到: 
Oracle Database 11g Express Edition Release 11.2.0.2.0 - 64bit Production
SQL> @/u01/app/oracle/fresh_install/1_create_user_and_tablespace.sql
SP2-0734: 未知的命令开头 "--查询表..." - 忽略了剩余的行。

表空间已创建。


用户已创建。
授权成功。

SQL> exit
从 Oracle Database 11g Express Edition Release 11.2.0.2.0 - 64bit Production 断开

Now create your items via:

oracle@c7edb0017fa8:~/product/11.2.0/xe/bin$ ./sqlplus xxxxxxxx/xxxxxxxx

SQL*Plus: Release 11.2.0.2.0 Production on 星期五 1月 19 08:02:13 2018

Copyright (c) 1982, 2011, Oracle.  All rights reserved.


连接到: 
Oracle Database 11g Express Edition Release 11.2.0.2.0 - 64bit Production

SQL> @/u01/app/oracle/fresh_install/2_xxxxxxxx_ddl.sql

提交完成。
SQL> @/u01/app/oracle/fresh_install/3_xxxxxxxx_data.sql

SQL> @/u01/app/oracle/fresh_install/4_goegouwoguwog.sql


SQL> exit
从 Oracle Database 11g Express Edition Release 11.2.0.2.0 - 64bit Production 断开
oracle@c7edb0017fa8:~/product/11.2.0/xe/bin$ exit
logout
root@c7edb0017fa8:~/fresh_install# exit
logout
Connection to localhost closed.

Save the docker image via:

$ sudo docker commit c7edb0017fa8 mxxxxxxx
$ sudo docker save mxxxxxxx>mxxxxx.tar

OK, you got a initialized oracledb images.