powerline

20230704 powerline

ref: link

$ pip3 install --user powerline-status

$ git clone https://github.com/powerline/fonts.git
$ cd fonts; ./install.sh
$ cd - 
$ rm -rf fonts

$ python3 -m site --user-site

• output as ${PYTHON_SITE_PACKAGE_PATH}

$ cd ${PYTHON_SITE_PACKAGE_PATH}
$ mkdir -p scripts
$ cp ../../../bin/* ./scripts/

• add to ~/.bash_profile

POWERLINE_PATH=`python3 -m site --user-site`
POWERLINE_SCRIPT=$POWERLINE_PATH/powerline/bindings/bash/powerline.sh
if [ -f $POWERLINE_SCRIPT ]; then
  $POWERLINE_PATH/scripts/powerline-daemon -q
  POWERLINE_BASH_CONTINUATION=1
  POWERLINE_BASH_SELECT=1
  source $POWERLINE_SCRIPT
fi

設定

• ~/.config/powerline/config.json

{
  "ext": {
    "shell": {
      "theme": "elvis"
    }
  }
}

• ~/.config/powerline/themes/shell/main.json

{
  "segment_data": {
    "hostname": {
      "args": {
        "only_if_ssh": true
      }
    },
    "cwd": {
      "args": {
        "dir_limit_depth": 10
      }
    }
  }
}

• ~/.config/powerline/themes/shell/elvis.json

{
    "segments": {
        "left": [
            {
                "function": "powerline.segments.common.net.hostname",
                "priority": 10
            },
            {
                "function": "powerline.segments.common.env.user",
                "priority": 30
            },
            {
                "function": "powerline.segments.common.time.date",
                "args": {
                    "format": "%H:%M",
                    "istime": true
                },
                "priority": 50
            },
            {
                "function": "powerline.segments.common.vcs.branch",
                "priority": 40
            },
            {
                "function": "powerline.segments.common.env.virtualenv",
                "priority": 50
            },
            {
                "function": "powerline.segments.shell.cwd",
                "priority": 10
            },
            {
                "function": "powerline.segments.shell.jobnum",
                "priority": 20
            },
            {
                "function": "powerline.segments.shell.last_status",
                "priority": 10
            }
        ]
    }
}

vim

安裝 vim-airline

• ~/.vimrc

let g:Powerline_symbols = 'fancy'
let g:airline_powerline_fonts = 1

Access k8s inside NAT

scp ${SERVERIP}:~/.kube/config ./ciconfig

• add insecure-skip-tls-verify: true
• remove certificate-authority-data in cluster

apiVersion: v1
clusters:
- cluster:
    insecure-skip-tls-verify: true
    server: https://{IP}:6443
  name: cluster.local

kubernetes 1.18 glusterfs Crash loop

glusterfs cannot be launched in time to reach it's readiness
i.e. systemctl status glusterd.service cannot be ready in 3 seconds.

solution: modify the initial delay seconds to much longer value

diff --git a/contrib/network-storage/heketi/roles/provision/templates/glusterfs-daemonset.json.j2 b/contrib/network-storage/heketi/roles/provision/templates/glusterfs-daemonset.json.j2
index 8934fa92..62ae94a4 100644
--- a/contrib/network-storage/heketi/roles/provision/templates/glusterfs-daemonset.json.j2
+++ b/contrib/network-storage/heketi/roles/provision/templates/glusterfs-daemonset.json.j2
@@ -74,7 +74,7 @@
                         },
                         "readinessProbe": {
                             "timeoutSeconds": 3,
-                            "initialDelaySeconds": 3,
+                            "initialDelaySeconds": 600,
                             "exec": {
                                 "command": [
                                     "/bin/bash",
@@ -85,7 +85,7 @@
                         },
                         "livenessProbe": {
                             "timeoutSeconds": 3,
-                            "initialDelaySeconds": 10,
+                            "initialDelaySeconds": 600,
                             "exec": {
                                 "command": [
                                     "/bin/bash",

Icinga2 http check failure

莫名奇妙搞了很久的設定

object Host Dev {
  import "generic-host"
  address = "dev.examplexxx.com"
  vars.http_vhosts["http"] = {
+   http_vhost = "dev.examplexxx.com"
    http_verbose = true
    http_port = 443
    http_uri = "/login"
    http_sni = true
    http_ssl_force_tlsv1_2_or_higher = true
  }
-  check_command = "hostalive"
+  check_command = "hostalive4"
}

1. 可能是我 server 有經過 cloudfront 的關係
   不加 http_vhost 會出問題
   Error message

CRITICAL - Cannot make SSL connection.
23112094376384:error:14094410:SSL routines:ssl3_read_bytes:sslv3 alert handshake failure:../ssl/record/rec_layer_s3.c:1528:SSL alert number 40
SSL initialized

2. 沒有 ipv6 要改用 hostalive4
   Error message

CRITICAL - Network Unreachable (dev.examplexxx.com)

App Transport Security 測試

客戶的網站設定怪怪的
React Native Webview 沒辦法 load 出他的網頁

找到一篇 SSL certificate Error with App Transport Security

$ nscurl --ats-diagnostics --verbose https://XXX.XXXX.XXX

可以試出來可用的組合

TLSv1.0 with PFS disabled and insecure HTTP allowed
ATS Dictionary:
{
    NSExceptionDomains =     {
        "XXX.XXXX.XXX" =         {
            NSExceptionAllowsInsecureHTTPLoads = true;
            NSExceptionMinimumTLSVersion = "TLSv1.0";
            NSExceptionRequiresForwardSecrecy = false;
        };
    };
}
Result : PASS

再把這些東西設進 plist 就好了

Xcode 9 code signing

20170922 Xcode 9 signing

Xcode9 又把 exportOption 改掉了

平常用的 script

xcodebuild -exportArchive -archivePath ./release/output.xcarchive -exportOptionsPlist ios/export_ship.plist -exportPath ./release

要修改一下 ios/

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>method</key>
    <string>app-store</string>
    <key>teamID</key>
    <string>XXXXXXXXXX</string>
    <key>signingStyle</key>
    <string>manual</string>
    <key>signingCertificate</key>
    <string>iOS Distribution</string>
    <key>provisioningProfiles</key>
    <dict>
        <key>com.your.bundle.id</key>
        <string>ProvisioningProfiles name</string>
    </dict>
</dict>
</plist>

這次新增了

• signingStyle
• signingCertificate
• provisioningProfiles
  • 這個從 XXXXXX.xcodeproj/project.pbxproj 去找出名字

詳細的選項可以參考 Code Signing Updates in Xcode 9

brew install older keg && watchman issue

20170831 brew install older keg && watchman issue

watchman 卡住怪怪的, 試著裝回舊版

暫時改用舊版

$ cd /usr/local/Homebrew/Library/Taps/homebrew/homebrew-core

• 找到 4.9.0 的 commit e253d29d759d8e00b46a573d9724ac4d397f5c67

$ git revert e253d29d759d8e00b46a573d9724ac4d397f5c67

• 重新安裝 watchman 就會從 4.9.0 回 4.7.0 了

$ brew uninstall watchman
$ brew install watchman

再回復 homebrew 原來的 git repo

$ gir reset --hard @~1

結果解決不了 -__-

後來發現 watchman 卡住跑不起來的解法

$ rm -rf /usr/local/var/run/watchman

在 tmux 外重跑

$ brew reinstall watchman
$ watchman version

Netinfo in React Native

20161103 Netinfo in React Native

React Native 判斷 NetInfo 這部份的 API 在兩個平台上不大相容

變得有點奇怪

參考這裡面的作法

src/actions/network.js

  setIsConnected: (isConnected: boolean): Action => ({
    type: 'setIsConnected',
    isConnected,
  }),
  setConnectType: (connectType: string): Action => ({
    type: 'setConnectType',
    connectType,
  }),

src/reducer/network.js

add corresponding reducer

src/entry.js

  constructor(props) {
    super(props);
    // force reset otherwise could be a problem in persist storage
    this.props.actions.setIsConnected(false);
    this.props.actions.setConnectType(undefined);
  }

  componentDidMount() {
    NetInfo.addEventListener('change', this.dispatchConnected);
    // iOS doesn't have to do this
    NetInfo.fetch().done(
      connectType => this.dispatchConnected(connectType)
    );
  }

  componentWillUnmount() {
    NetInfo.removeEventListener('change', this.dispatchConnected);
  }

  dispatchConnected = (connectType) => {
    let isConnected = false;
    if (connectType.toLowerCase() !== 'none' && connectType.toLowerCase() !== 'unknown') {
      isConnected = true;
    }
    this.props.actions.setIsConnected(isConnected);
    this.props.actions.setConnectType(connectType);
  };

Usage

store.network.isConnect boolean
store.network.connectType string

it could be undefined

build iphone app by command line

20160722 build iphone app by commandline

如果沒使用 CocoaPods 的話, -workspace 可以不用指定

假設 project 名字是 hello

$ cd ios && xcodebuild -workspace hello.xcworkspace -scheme hello -destination generic/platform=iOS -configuration Release -derivedDataPath build
$ ios-deploy -b build/Build/Products/Release-iphoneos/hello.app

然後安裝 ios-deploy

這邊要注意的是 build 成 Release才能獨立執行
如果是 Debug 版需要
修改路徑 Release-iphoneos 成 Debug-iphoneos
而且要使用 --debug 去執行

$ ios-deploy --debug -b build/Build/Products/Debug-iphoneos/hello.app