1950195/openshift.md

## openshift.md

      
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              openshift.md
            
          
    Openshift —— 强大的免费nodejs空间！（含免费二级域名）

简介

网址：https://www.openshift.com/
redhat 旗下站点，提供多种语言的免费云空间。
创建属于你的Nodejs站点

如何创建


免费注册用户
点选右上角“MY APPS”
“Create Application”
找到“Node.js 0.6”（有同学问：我不要0.6，我要最新版！！！请接着看...）
填写“Public URL” --> “Create Application”
恭喜你，得到一个1G容量的个人网站，开始你的Nodejs创作之旅吧

如何使用

GIT REPOSITORY

$ git clone ssh://xxx@xx.rhcloud.com/~/git/exp.git/
即可把项目成功下载到本地，修改你的code，利用git命令去提交你的code，立即可以看到最新效果！
Secure Shell

$ ssh xxx@xx.rhcloud.com
即可远程登录你的空间，相关指令可以用 help 命令查看，也可看这里
如何升级nodejs版本

新增一个路由查看系统环境

编辑server.js，在self.createRoutes内新增：
self.routes['/env'] = function(req, res) {
    res.setHeader('Content-Type', 'text/html');
    res.send('<!DOCTYPE html><html>\n' +
        '<head><title>Node.js Process Env</title></head>\n' +
        '<body>\n<br />\n' +
        'Node Version: ' + process.version +
        '\n<br />\nEnv: {<br />\n<pre>' +
        (function(content) {
            for (k in process.env) {
                content += '   ' + k + ': ' + process.env[k] + '\n';
            }
            return content;
        })('') + '}\n</pre><br/>\n' +
        '</body>\n</html>');
};
$ git add server.js
$ git commit -m 'create a route to show process environment.'
$ git push
好了，现在可以访问你的站点，http://yours-app.rhcloud.com/env，即可检查Nodejs运行环境
创建更新脚本

$ touch .openshift/markers/NODEJS_VERSION
$ echo '0.10.15' >> .openshift/markers/NODEJS_VERSION
$ mkdir .openshift/lib
$ vim .openshift/lib/utils
复制如下代码到你的文件
#!/bin/bash
function get_node_version() {
    marker="$OPENSHIFT_REPO_DIR/.openshift/markers/NODEJS_VERSION"
    nodejs_ver=$(egrep -v "^\s*#.*" "$marker" | egrep -v "^\s*$" | tail -1)
    echo "${nodejs_ver:-$marker}"
}
function get_node_install_dir() {
    echo "$OPENSHIFT_DATA_DIR"
}
function get_npm_bin_path() {
    ver=${1:-"$(get_node_version)"}
    echo "$(get_node_install_dir)/node-v$ver-linux-x64/bin"
}
function get_node_bin_path() {
    echo "$(get_npm_bin_path $@)"
}
function get_node_tmp_dir() {
    ztmpdir="$OPENSHIFT_DATA_DIR/.nodejs.tmp"
    [ -d "$ztmpdir" ]  ||  mkdir -p "$ztmpdir"
    echo "$ztmpdir"
}
function _install_nodejs() {
    ver=${1:-"$(get_node_version)"}
    zfile="node-v${ver}-linux-x64.tar.gz"
    zlink="http://nodejs.org/dist/v${ver}/${zfile}"
    instdir="$(get_node_install_dir)"
    dldir="$OPENSHIFT_DATA_DIR/downloads"
    mkdir -p "$dldir"
    echo "  - Downloading and extracting $zlink ... "
    if ! curl -L -o "$dldir/$zfile" "$zlink"; then
        echo "  - ERROR  -- download failed for $zlink"
        echo "  - download uri = $dldir/$zfile"
        return 1
    fi
    (cd "$instdir"; tar -zxf "$dldir/$zfile")
    echo "  - Done installing Node.js version $ver"
}
function _ensure_bash_profile_setup() {
    dot_bash_profile=$OPENSHIFT_DATA_DIR/.bash_profile
    pattern='\s*source(.*)\.openshift/lib/setup_custom_nodejs_env\s*(.*)\s*'
    if ! egrep "$pattern" $dot_bash_profile > /dev/null 2>&1 ; then
        cat >> $dot_bash_profile  <<SRCEOF
source "\$OPENSHIFT_REPO_DIR/.openshift/lib/setup_custom_nodejs_env"
SRCEOF
        echo "  - Added source setup_custom_nodejs_env to .bash_profile"
    fi
}
function ensure_node_is_installed() {
    ver=${1:-"$(get_node_version)"}
    echo "  - Checking to see if Node.js version $ver is installed ... "
    if [ -d  "$(get_node_bin_path)" ]; then
        echo "  - Node.js version $ver is already installed"
    else
        _install_nodejs "$ver"
    fi
    _ensure_bash_profile_setup
}
function setup_path_for_custom_node_version() {
    ver=${1:-"$(get_node_version)"}
    node_bin_path=$(get_node_bin_path "$ver")
    export PATH="$node_bin_path:${PATH}"
    if [ -n "$_SHOW_SETUP_PATH_MESSAGES" ]; then
        echo "  - PATH set to include custom node version ($ver) from"
        echo "       $node_bin_path "
        echo "    PATH = $PATH"
    fi
}
保存
$ vim .openshift/lib/setup_custom_nodejs_env
复制下面的内容
#  bash profile ($OPENSHIFT_DATA_DIR/.bash_profile).
source $OPENSHIFT_REPO_DIR/.openshift/lib/utils
function _setup_path_and_remove_wrappers() {
    [ -z "$ZDEBUG" ]  ||  echo "Setting path to include custom Node version"
    setup_path_for_custom_node_version
    unset node
    unset npm
    unset _setup_path_and_remove_wrappers
}
function npm() {
    _setup_path_and_remove_wrappers
    npm "$@"
}
function node() {
    _setup_path_and_remove_wrappers
    node "$@"
}
保存
$ vim .openshift/action_hooks/pre_build
复制下面的内容
#!/bin/bash
source "$OPENSHIFT_REPO_DIR/.openshift/lib/utils"
echo ""
ensure_node_is_installed
mv  "${OPENSHIFT_REPO_DIR}/package.json"  "$(get_node_tmp_dir)"
保存
$ vim .openshift/action_hooks/build
复制下面的内容
#!/bin/bash
source "$OPENSHIFT_REPO_DIR/.openshift/lib/utils"
_SHOW_SETUP_PATH_MESSAGES="true" setup_path_for_custom_node_version
tmp_package_json="$(get_node_tmp_dir)/package.json"
if [ -f "$tmp_package_json" ]; then
    [ -f "${OPENSHIFT_REPO_DIR}/package.json" ]  ||    \
        mv "$tmp_package_json" "${OPENSHIFT_REPO_DIR}/package.json"
fi
if [ -f "${OPENSHIFT_REPO_DIR}"/package.json ]; then
    echo "  - Installing dependencies w/ new version of npm ... "
    echo
        (cd "${OPENSHIFT_REPO_DIR}"; export TMPDIR="/tmp"; npm install -d)
fi
保存
# vim .openshift/action_hooks/pre_start_nodejs-0.6
复制下面内容
#!/bin/bash
source "$OPENSHIFT_REPO_DIR/.openshift/lib/utils"
ver=$(get_node_version)
echo ""
echo "  - pre_start_nodejs: Adding Node.js version $ver binaries to path"
_SHOW_SETUP_PATH_MESSAGES="true" setup_path_for_custom_node_version
保存
$ git add .openshift
$ git commit -m 'create shell bash to upgrade nodejs version'
$ git push

再次访问你的站点，http://yours-app.rhcloud.com/env，检查Nodejs运行环境
结束。