Development

OpenShift基本使用觀念

由於專案關係，建了不少服務到OpenShift上面。
來開始記錄服務帶起來的基本流程。

建立流程
  1. 先建立一個Project
  • 這個名稱會影響內部的各專案的網路連結。例如名稱dev-test， 專案內部連結連上這個服務url為xxx.dev-test。(xxx 為專案內的服務名)

  1. ConfigMaps
    服務容器的環境變數

  2. Services
    設置服務名稱、port

  3. Routes
    對外URL、對該Route timeout設定

  4. NetworkPolicies
    防火牆、權限設置，這個可影響各專案是否可以內部互通。 若專案間沒設置就只能用外部Routes互通

  5. DeploymentConfigs (這個會把Pod帶起來所以最後弄)

  • 設置CPU使用、記憶體使用、 提供的port、服務檢測、服務備援、設定image來源、mount、triggers、termination-log 等設定

Extra:

  • CronJobs (做法類似linux指令)
  • ImageStreams (image 放置的地方)

Deploy Script (視情況調整)

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#!/bin/bash
IsSuccess(){
	if [$? != 0]
    then 
            echo "${tput setaf 1} ~~Caution:" $1" fail ! ${tput sgr 0}"
	        exit 1
	else
            echo "${tput setaf 2} ~~Execution:" $1" OK ! ${tput sgr 0}"
	fi
}

read -p "Please input [DeploymentConfig Name] : " dcName
read -p "Please input [Version] : " version
read -p "Please input [tar location path] : " tar_location
read -p "Please input [OpenShift project] : " openshift_project
read -p "Please input [OpenShift url] : " openshift_url
read -p "Please input [OpenShift account] : " account
read -p "Please input [OpenShift password] : " password

test -z ${dcName} && echo "You Must input a DeploymentConfig Name." && exit 0
test -z ${version} && echo "You Must input a version." && exit 0

image_name=$dcName
image_tag=$version
tar_location="${tar_location}/${image_name}-${image_tag}.tar"

echo "==================start=================="
oc login -u $account -p $password
IsSuccess "oc login"
oc project $openshift_project
IsSuccess "switch project"
podman login $openshift_url -p ${oc whoami -t} -u ${oc whoami -t}
IsSuccess "podman login"
podman load -i "${tar_location}"
IsSuccess "podman load [${tar_location}]"
podman push "${openshift_url}/${openshift_project}/${image_name}:${image_tag}"
IsSuccess "podman push"
oc tag $image_name:$image_tag $image_name:stable
IsSuccess "oc tag [${image_name}:${image_tag}] to stable" 
oc rollout status dc/$dcName
echo "==================End=================="

more info:
Shell教程
Open shift CLI
Deployment vs DeploymentConfig
OpenShift中的Deployment和DeploymentConfig