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crazylion lee

Debugging WordPress (The Right Way) | Tom McFarlin - 0 views

tommcfarlin.com/debugging-wordpress

wordpress debug php

shared by crazylion lee on 02 Oct 16 - No Cached
  • crazylion lee on 02 Oct 16
     
    "Debugging WordPress projects is one of those things that WordPress developers seem to approach differently."
crazylion lee

VPT 7 | Conversations with spaces - 0 views

hcgilje.wordpress.com/vpt

mapping projector

shared by crazylion lee on 25 Aug 16 - No Cached
  • crazylion lee on 25 Aug 16
     
    "VPT (VideoProjectionTool) is a free multipurpose realtime projection software tool for Mac and Windows created by HC Gilje. "
crazylion lee

Docker in Production: A History of Failure - The HFT Guy - 0 views

thehftguy.wordpress.com/...oduction-an-history-of-failure

docker

shared by crazylion lee on 12 Nov 16 - No Cached
  • crazylion lee on 12 Nov 16
     
    docker 用在大規模的失敗經驗，值得一讀
crazylion lee

Google Cloud is 50% cheaper than AWS - The HFT Guy - 0 views

thehftguy.wordpress.com/...e-cloud-is-50-cheaper-than-aws

google cloud aws ec2

shared by crazylion lee on 20 Nov 16 - No Cached
  • crazylion lee on 20 Nov 16
     
    "Google Cloud is 50% cheaper than AWS"
crazylion lee

Writing a Bootloader | Blog of Osanda - 1 views

osandamalith.wordpress.com/...writing-a-bootloader

bootloader linux c

shared by crazylion lee on 06 Nov 15 - No Cached
  • crazylion lee on 06 Nov 15
     
    "A bootloader is a special program that is executed each time a bootable device is initialized by the computer during its power on or reset that will load the kernel image into the memory. This application is very close to hardware and to the architecture of the CPU. All x86 PCs boot in Real Mode. In this mode you have only 16-bit instructions. Our bootloader runs in Real Mode and our bootloader is a 16-bit program."
張 旭

ProxySQL Series : Percona Cluster/MariaDB Cluster (Galera) Read-write Split - Mydbops - 0 views

mydbops.wordpress.com/...luster-galera-read-write-split

mysql database cluster mariadb proxy

shared by 張 旭 on 18 Nov 18 - No Cached
  • PXC / MariaDB Clusters really works better with writes on single ode than multi node writes.
  • proxySQL setup for a cluster in Single-writer mode, Which is the most recommended for Cluster to avoid of conflicts of writes and split-Brain scenarios.
  • listening on ports 6032 for proxysql admin interface and 6033 for MySQL interface by default
  • 張 旭 on 18 Nov 18
     
    "PXC / MariaDB Clusters really works better with writes on single ode than multi node writes. "
張 旭

Keycloak and FreeIPA Intro - scott poore's blog - 0 views

spoore.wordpress.com/...keycloak-and-freeipa-intro

authorization authentication oauth system security freeipa user ldap

shared by 張 旭 on 12 Jul 19 - No Cached
  • Keycloak is an “Open source identity and access management” solution.
  • setup a central Identity Provider (IdP) that applications acting as Service Providers (SP) use to authenticate or authorize user access.
  • FreeIPA does a LOT more than just provide user info though.  It can manage user groups, service lists, hosts, DNS, certificates, and much, much, more.
  • ...5 more annotations...
  • IPA – refers to the FreeIPA Master Server.
  • IdP – as mentioned earlier, IdP stands for Identity Provider.
  • SP – stands for Service Provider.   This can be a java application, jboss, etc.  It can also be a simple Apache web server
  • SAML – stands for Security Assertion Markup Language and refers to mod_auth_mellon here.  This provides the SSO functionality.
  • Openidc – stands for OpenID Connect.
張 旭

Improving Kubernetes reliability: quicker detection of a Node down | Fatal failure - 0 views

fatalfailure.wordpress.com/...icker-detection-of-a-node-down

kubernetes HA

shared by 張 旭 on 21 Jul 21 - No Cached
  • when a Node gets down, the pods of the broken node are still running for some time and they still get requests, and those requests, will fail.
  • 1- The Kubelet posts its status to the masters using –node-status-update-frequency=10s 2- A node dies 3- The kube controller manager is the one monitoring the nodes, using –-node-monitor-period=5s it checks, in the masters, the node status reported by the Kubelet. 4- Kube controller manager will see the node is unresponsive, and has this grace period –node-monitor-grace-period=40s until it considers the node unhealthy.
  • node-status-update-frequency x (N-1) != node-monitor-grace-period
  • ...2 more annotations...
  • 5- Once the node is marked as unhealthy, the kube controller manager will remove its pods based on –pod-eviction-timeout=5m0s
  • 6- Kube proxy has a watcher over the API, so the very first moment the pods are evicted the proxy will notice and update the iptables of the node, removing the endpoints from the services so the failing pods won’t be accessible anymore.
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