I know that everybody forgot about this blog but I’ll try to liven it up.
\nSome days ago at Moscow OpenSolaris User Group meeting was 2 presentations about network. First one was about Crossbow and all around and second one was about network load balancing … with Linux and FreeBSD and nothing about Solaris.
\nSo as nobody knew anything about network load balancing with Solaris i have decided to write about it.
\nThere are some solutions for network balancing in FreeBSD and Linux and really nothing like this exists in Solaris 10.
\nTime stands still and Solaris 11 Express is already exists and OpenSolaris already doesn’t exists \ud83d\ude42
\nIt is in the OpenSolaris appeared support ILB ( Integrated Load Balancer ) and now it is included to Solaris 11 Express.
\nSo let’s try to configure Solaris ILB.
\nFirst of all you need to check that ilb is installed and if no, install it.<\/p>\n
\r\nroot@solaris:~# pkg search ilbadm\r\nINDEX ACTION VALUE PACKAGE\r\nbasename file usr\/sbin\/ilbadm pkg:\/service\/network\/load-balancer\/ilb@0.5.11-0.151.0.1\r\nroot@solaris:~# man pkg\r\nroot@solaris:~# pkg install pkg:\/service\/network\/load-balancer\/ilb@0.5.11-0.151.0.1\r\n Packages to install: 1\r\n Create boot environment: No\r\n Services to restart: 1\r\nDOWNLOAD PKGS FILES XFER (MB)\r\nCompleted 1\/1 11\/11 0.2\/0.2\r\n\r\nPHASE ACTIONS\r\nInstall Phase 38\/38 \r\n\r\nPHASE ITEMS\r\nPackage State Update Phase 1\/1 \r\nImage State Update Phase 2\/2 \r\n\r\nPHASE ITEMS\r\nReading Existing Index 8\/8 \r\nIndexing Packages 1\/1\r\nroot@solaris:~#\r\n<\/pre>\nNow ILB installed and we can configure load balancing.
\nFirst of all let’s start ilb daemon. But before this we ought to start ip forwarding. If you forget to do so ilbadm output would be really helpful.<\/p>\n\r\nroot@solaris:~# ilbadm show-rule\r\nilbadm: socket() failed\r\nroot@solaris:~#\r\n<\/pre>\nSo let’s start ip forwarding and ilb daemon.<\/p>\n
root@solaris:~# svcadm enable svc:\/network\/ipv4-forwarding\r\nroot@solaris:~# svcadm enable svc:\/network\/loadbalancer\/ilb:default <\/pre>\nILB supports 3 modes :
\n – DST
\n – Full NAT
\n – Half NAT<\/p>\nIn the DSR ( Direct Server Return ) mode, ILB balances the incoming requests to the back-end servers, and letting the return traffic from the servers bypass the load balancer by being sent directly to the client.
\nNAT-based load balancing involves rewriting of IP header information,and handles both the request and the response traffic.
\nIn Full NAT mode ILB involves rewriting of both source and destination IP fields, making it appear to the back-end servers that all connections are originating at the load balancer. Clients will also receive packets from preconfigured IP range.
\nIn the half-NAT mode ILB rewrites only destination IP address.<\/p>\nI have used 3 servers to try ILB. Two of them i used as back-end servers. I have started nginx there. There IPs : 192.168.57.102,192.168.57.103. ILB was started at the third server with IP 192.168.57.101.<\/p>\n
First of all I’ve configured server group, which will process http traffic :<\/p>\n
\r\nroot@solaris:~# ilbadm create-servergroup -s servers=192.168.57.102:80,192.168.57.103:80 websg\r\nroot@solaris:~# ilbadm show-servergroup\r\nroot@solaris:\/tmp# ilbadm show-sg\r\nSGNAME SERVERID MINPORT MAXPORT IP_ADDRESS\r\nwebsg _websg.0 80 80 192.168.57.102\r\nwebsg _websg.1 80 80 192.168.57.103\r\n<\/pre>\nAnd then I’ve configured balance rule. First of all let’s try full NAT.<\/p>\n
\r\nroot@solaris:\/tmp# ilbadm create-rule -e -i vip=192.168.56.101,port=80 -m lbalg=rr,type=NAT,proxy-src=192.168.56.101 -o servergroup=websg webrule\r\nroot@solaris:\/tmp# ilbadm show-rule\r\nRULENAME STATUS LBALG TYPE PROTOCOL VIP PORT\r\nwebrule E roundrobin NAT TCP 192.168.56.101 80\r\n<\/pre>\nAnd that’s all!
\nI have configured that http traffic to 192.168.56.101 ( virtual IP ) will be load balanced across 2 servers using round robin algorithm. Clients will receive replies from IP 192.168.56.101.
\nLet’s change ILB mode from full NAT to Half NAT.<\/p>\n\r\nilbadm delete-rule -a\r\nilbadm create-rule -e -i vip=192.168.56.101,port=80 -m lbalg=rr,type=h -o servergroup=websg webrule\r\nroot@solaris:\/tmp# ilbadm show-rule\r\nRULENAME STATUS LBALG TYPE PROTOCOL VIP PORT\r\nwebrule E roundrobin HALF-NAT TCP 192.168.56.101 80\r\n<\/pre>\nThis is really easy to configure. Of course there are a lot of options. For example you can select load balancing algorithm Moreover, ILB offers an optional server monitoring feature that can provide server health checks. Another great options are : Session persistence and Connection draining
\nMore details about the ILB can be read on wiki<\/a>
\nI’m not really an expert in load balancers but ILB looks much more useful and functional than FreeBSD or Linux analogs.<\/p>\n","protected":false},"excerpt":{"rendered":"I know that everybody forgot about this blog but I’ll try to liven it up. Some days ago at Moscow OpenSolaris User Group meeting was 2 presentations about network. First one was about Crossbow and all around and second one was about network load balancing … with Linux and FreeBSD and nothing about Solaris. So […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[6,3],"tags":[],"_links":{"self":[{"href":"http:\/\/pavlenko.net\/antony\/wp-json\/wp\/v2\/posts\/33"}],"collection":[{"href":"http:\/\/pavlenko.net\/antony\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/pavlenko.net\/antony\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/pavlenko.net\/antony\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/pavlenko.net\/antony\/wp-json\/wp\/v2\/comments?post=33"}],"version-history":[{"count":2,"href":"http:\/\/pavlenko.net\/antony\/wp-json\/wp\/v2\/posts\/33\/revisions"}],"predecessor-version":[{"id":35,"href":"http:\/\/pavlenko.net\/antony\/wp-json\/wp\/v2\/posts\/33\/revisions\/35"}],"wp:attachment":[{"href":"http:\/\/pavlenko.net\/antony\/wp-json\/wp\/v2\/media?parent=33"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/pavlenko.net\/antony\/wp-json\/wp\/v2\/categories?post=33"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/pavlenko.net\/antony\/wp-json\/wp\/v2\/tags?post=33"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}