2011-01-25
- linux.conf.au LCA2011 Day 2
- Keynote: Vinton G. Cerf
SysAdmin Miniconf
- <1> Implementing devops in the real world - Devdas Bhagat
- 講者主要想談的是如何讓開發者改變,開創新的公司文化?首先,讓開發者去面對客戶,其次是提供客服(Customer Service)、監控服務(Monitor System)、打包軟體(Packaging)、設定管理(Configuration Management)、分析日誌(Log Analysis)、版本控制等。
- <2> Brief history of time sync - Julien Goodwin
- 介紹不同的振盪器,時鐘,到最後的 NTP(Network Time Protocol), PTP(Precision Time Protocol)
- 時間同步的重要性:Log Analysis 日誌分析如果時間不對,也沒啥用了!!
- <3> Samba4 update, new features and real users - Andrew Bartlett
- <4> Setting up a HA cluster in 20 minutes + avoiding common errors - by Sander van Vugt
- 講者是"A Practical Guide to XEN High Availability"的作者
- Corosync Cluster Engine - 用 Multicast 方式,讓叢集的每一台電腦自動加入。
- 講者用 SuSE 的 yast 工具,執行 cluster 的工具,然後產生 /etc/corosync/corosync.conf
- 在 SuSE 底下用 openais 提供 Standards Based Cluster Framework
- 用 crm_mon 指令來查目前叢集的狀態(命令列),或者用 crm_gui 圖形介面。
- OCF 比 heartbeat 新,所以講者建議用 OCF 或 LSB
- <5> IPv6 issues and experience - by Peter Chubb
- Issues: (1) Routing (2) Naming (3) DHCP/PXE boot still IPv4 (4) DNS, NTP is more complex than IPv4
- <6> Centrally monitoring almost anything - by Ken Wilson
- 主要介紹使用 Nagios 的經驗分享
- http://docs.pnp4nagios.org
- <7> Backing up network devices - by Julien Goodwin
- 介紹如何備份 Cisco IOS, Juniper OS 等路由器的設定與作業系統
- http://www.shrubbery.net/rancid/ - RANCID : Really Awesome New Cisco confIg Differ
- 用 CVS 或 SVN 紀錄網路設定檔,所以可以追蹤設定檔的變動歷史
- http://code.google.com/p/punc/ - PUNC : RANCID replacement
- http://code.google.com/p/notch/ - Notch : A Network Operator's Toolkit for Command-line Hacking
- http://code.google.com/p/mr-cli/ - Mr. CLI
- <8> DNSSEC @ Mozilla - by Shyam Mani
- DNS Security Extensions - 因為 DNS Cache 造成一些安全上的困擾,所以要用金鑰的方式來識別是否為同一個 DNS-IP 對應結果。
- http://www.opendnssec.org/
- http://dnsviz.net/d/mozilla.org/dnssec/ - 驗證 Mozilla.org 的 DNSSEC 運作正常
- <9> Lightening Talk - Enterprise File System (EFS)
- <10> Lightening Talk - Building ISP using Open Source
- L2TPNS - http://l2tpns.sf.net/ - 可以自己架 ISP 服務
- <11> Defending VoIP on the Internet - Craig Askings
- 駭客會為了打昂貴的越洋電話或設法賺取利益而入侵 VoIP / SIP
- 建議在 VPN 裡面用 VoIP (架設 SIP 服務)
- http://www.fail2ban.org - fail2ban 可以幫忙根據嘗試密碼失敗的帳號進行封鎖動作 - Debian 套件 fail2ban
- http://etel.wiki.oreilly.com/wiki/index.php/SIP_DoS/DDoS_Mitigation
- <12> Lazy management of a secure gateway - Mark Suter
- <投影片> http://zwitterion.org/talks/sgs-20110125/lazy-gateway.pdf
- Cacti – Capacity Planning
- Nagios – Everything okay right now?
- !NetFlow Monitor – historical “tcpdump”
- Logs – syslog-ng /archive/yyyy-mm-dd/ - 透過 syslog-ng 做歷史日誌檔歸檔
- <13> Bare metal recovery - Caesar Sun
- <14> Resource allocation using cgroups - Steven Ellis
- cgroup (control group) 是 Linux 核心 2.6.27 以後的新功能,看起來有助於管理虛擬機器的權限。
- Resource controllers includes (1) CPU/CPUSET (2) Memory (3) Network (4) I/O
- 可以控制每個虛擬機器可以用的 CPU, Memory, Network & Disk I/O 資源比例為何
- http://libcg.sourceforge.net/ - libcgroup
- http://www.kernel.org/doc/Documentation/cgroups/cgroups.txt
- Manage Your Performance with Cgroups and Projects
- Using CGroups with libvirt and LXC/KVM guests in Fedora 12
- Introduction to Linux Cgroups
- 安裝方法:
~$ sudo apt-get install cgroup-bin libcgroup1
- Apache Example - /etc/cgconfig.conf
group http { memory { memory.limit_in_bytes = 1024 } }
- Apache Example - /etc/sysconfig/httpd
CGROUP_DAEMON="memory:/virt
- <15> Varnish and HTTP acceleration - Simon Lyall
- <16> En-Visage-ing system and instrumented statistics - Lindsay Holmwood
- http://visage-app.com
- 基於 Ruby, 可以把 RRDTool 的資料匯入,並繪製成圖形,以方便呈現關聯性。
Research and Student Innovation
- <*> Releasing Research as FOSS: Experiences from the K-Tree Project - by Chris De Vries
- http://ktree.sourceforge.net/ - The algorithm is a hybrid of the B+-tree and k-means algorithms.
Yubikey
- https://conf.linux.org.au/wiki/Yubikey
- 這次大會發了一個很像 USB 拇指碟的東西,叫做 Yubikey。試玩了一下,原來這是一個會依照時間產生密碼的裝置呢~挺有趣的!!
- 還可以跟 OpenID 結合呢!! - http://www.yubico.com/openid-server
- Keep Hackers Out: Out-of-Band Multi-Factor with Any Phone - 嗯~每支手機上如果多一顆這種晶片,拿來取代輸入密碼,應該頗實用。
Last modified 13 years ago
Last modified on Jan 12, 2012, 4:53:11 PM
Attachments (1)
- A_Practical_Guide_to_XEN_High_Availability.pdf (3.8 MB) - added by jazz 14 years ago.