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From resmo <...@git.apache.org>
Subject [GitHub] cloudstack pull request: [4.5] CLOUDSTACK-9042: VR: DHCP: fix miss...
Date Thu, 19 Nov 2015 11:32:59 GMT
Github user resmo commented on the pull request:

    https://github.com/apache/cloudstack/pull/1045#issuecomment-158030442
  
    Our test case on ACS 4.5.1:
    
    # Before fix
    ## vanilla router deployed:
    ~~~
    # related script
    ae693b5ef2d9b1fed1307f6b38213823  /opt/cloud/bin/edithosts.sh
    
    # see running VMs
    $ cloudstack-cli server list --project stxt_integration --zone BIEL_CU01 --state running
    Name            Instance-Name  State    Offering  Zone       Project           IP's
    web-eq-03       i-70-5871-VM   Running  2cpu_2gb  BIEL_CU01  STXT_INTEGRATION  10.101.65.183
10.101.192.50 10.101.128.50
    web-eq-01       i-70-5870-VM   Running  2cpu_2gb  BIEL_CU01  STXT_INTEGRATION  10.101.65.69
10.101.192.49 10.101.128.49
    jumphost-eq-01  i-70-5874-VM   Running  1cpu_1gb  BIEL_CU01  STXT_INTEGRATION  10.101.65.113
10.101.192.52 10.101.128.52
    
    
    # hosts on router (note vm eq-01 is stopped)
    root@r-6215-VM:~# cat /etc/hosts
    127.0.0.1	localhost
    
    # The following lines are desirable for IPv6 capable hosts
    ::1     localhost ip6-localhost ip6-loopback
    ff02::1 ip6-allnodes
    ff02::2 ip6-allrouters
    10.101.65.1 r-6215-VM
    10.101.65.176 eb-eq-04
    10.101.65.1 r-6215-VM
    10.101.65.1 r-6215-VM
    10.101.65.1 r-6215-VM
    10.101.65.1 r-6215-VM
    10.101.65.85 eq-01
    10.101.65.1 r-6215-VM
    10.101.65.1 data-server
    10.101.65.1 r-6215-VM
    10.101.65.69 web-eq-01
    10.101.65.183 web-eq-03
    10.101.65.113 jumphost-eq-01
    
    
    # dhcp hosts no problems as eq-01 entry was made before others *eq-01 entries.
    root@r-6215-VM:~# cat /etc/dhcphosts.txt 
    02:00:11:bb:03:53,set:10_101_65_176,10.101.65.176,eb-eq-04,infinite
    02:00:6e:44:03:58,set:10_101_65_85,10.101.65.85,eq-01,infinite
    02:00:4f:6d:03:4b,set:10_101_65_69,10.101.65.69,web-eq-01,infinite
    02:00:6f:94:03:4c,set:10_101_65_183,10.101.65.183,web-eq-03,infinite
    02:00:7a:76:03:4e,set:10_101_65_113,10.101.65.113,jumphost-eq-01,infinite
    ~~~
    ## start a VM named eq-01 
    ~~~
    ############# start a VM named eq-01
     $ cloudstack-cli server list --project stxt_integration --zone BIEL_CU01 --state running
    Name            Instance-Name  State    Offering  Zone       Project           IP's
    web-eq-03       i-70-5871-VM   Running  2cpu_2gb  BIEL_CU01  STXT_INTEGRATION  10.101.65.183
10.101.192.50 10.101.128.50
    web-eq-01       i-70-5870-VM   Running  2cpu_2gb  BIEL_CU01  STXT_INTEGRATION  10.101.65.69
10.101.192.49 10.101.128.49
    eq-01           i-70-6216-VM   Running  1cpu_1gb  BIEL_CU01  STXT_INTEGRATION  10.101.65.85
10.101.192.76 10.101.128.76
    jumphost-eq-01  i-70-5874-VM   Running  1cpu_1gb  BIEL_CU01  STXT_INTEGRATION  10.101.65.113
10.101.192.52 10.101.128.52
    
    
    # hosts still looks "good"
    root@r-6215-VM:~# cat /etc/hosts
    127.0.0.1	localhost
    
    # The following lines are desirable for IPv6 capable hosts
    ::1     localhost ip6-localhost ip6-loopback
    ff02::1 ip6-allnodes
    ff02::2 ip6-allrouters
    10.101.65.1 r-6215-VM
    10.101.65.176 eb-eq-04
    10.101.65.1 r-6215-VM
    10.101.65.1 r-6215-VM
    10.101.65.1 r-6215-VM
    10.101.65.1 data-server
    10.101.65.1 r-6215-VM
    10.101.65.69 web-eq-01
    10.101.65.183 web-eq-03
    10.101.65.113 jumphost-eq-01
    10.101.65.85 eq-01
    
    
    # dhcp entries *eq-01 where removed... BAD!!!
    root@r-6215-VM:~# cat /etc/dhcphosts.txt 
    02:00:11:bb:03:53,set:10_101_65_176,10.101.65.176,eb-eq-04,infinite
    02:00:6f:94:03:4c,set:10_101_65_183,10.101.65.183,web-eq-03,infinite
    02:00:6e:44:03:58,set:10_101_65_85,10.101.65.85,eq-01,infinite
    ~~~
    
    # With fix applied!
    ## Reset test env: stop VM eq-01, apply fix, restart router
    ~~~
    ############### stop VM eq-01, apply fix, restart router
    root@r-6215-VM:~# md5sum /opt/cloud/bin/edithosts.sh 
    a610c2dfb0248e6a74993d6452e14244  /opt/cloud/bin/edithosts.sh
    
    
    # everything looks fine after reset again (just because eq-01 came earlier then *eq-01)
    root@r-6215-VM:~# cat /etc/dhcphosts.txt 
    02:00:11:bb:03:53,set:10_101_65_176,10.101.65.176,eb-eq-04,infinite
    02:00:6e:44:03:58,set:10_101_65_85,10.101.65.85,eq-01,infinite
    02:00:4f:6d:03:4b,set:10_101_65_69,10.101.65.69,web-eq-01,infinite
    02:00:6f:94:03:4c,set:10_101_65_183,10.101.65.183,web-eq-03,infinite
    02:00:7a:76:03:4e,set:10_101_65_113,10.101.65.113,jumphost-eq-01,infinite
    
    
    root@r-6215-VM:~# cat /etc/hosts
    127.0.0.1	localhost
    
    # The following lines are desirable for IPv6 capable hosts
    ::1     localhost ip6-localhost ip6-loopback
    ff02::1 ip6-allnodes
    ff02::2 ip6-allrouters
    10.101.65.1 r-6215-VM
    10.101.65.176 eb-eq-04
    10.101.65.1 r-6215-VM
    10.101.65.1 r-6215-VM
    10.101.65.1 r-6215-VM
    10.101.65.1 r-6215-VM
    10.101.65.85 eq-01
    10.101.65.1 r-6215-VM
    10.101.65.1 data-server
    10.101.65.1 r-6215-VM
    10.101.65.69 web-eq-01
    10.101.65.183 web-eq-03
    10.101.65.113 jumphost-eq-01
    ~~~
    ## start VM eq-01
    ~~~
    #### start VM eq-01
    
    # hosts still look good here after the fix
    root@r-6215-VM:~# cat /etc/hosts
    127.0.0.1	localhost
    
    
    # The following lines are desirable for IPv6 capable hosts
    ::1     localhost ip6-localhost ip6-loopback
    ff02::1 ip6-allnodes
    ff02::2 ip6-allrouters
    10.101.65.1 r-6215-VM
    10.101.65.176 eb-eq-04
    10.101.65.1 r-6215-VM
    10.101.65.1 r-6215-VM
    10.101.65.1 r-6215-VM
    10.101.65.1 r-6215-VM
    10.101.65.1 r-6215-VM
    10.101.65.1 data-server
    10.101.65.1 r-6215-VM
    10.101.65.69 web-eq-01
    10.101.65.183 web-eq-03
    10.101.65.113 jumphost-eq-01
    10.101.65.85 eq-01
    
    # /etc/dhcphosts looks as it should!
    root@r-6215-VM:~# cat /etc/dhcphosts.txt 
    02:00:11:bb:03:53,set:10_101_65_176,10.101.65.176,eb-eq-04,infinite
    02:00:4f:6d:03:4b,set:10_101_65_69,10.101.65.69,web-eq-01,infinite
    02:00:6f:94:03:4c,set:10_101_65_183,10.101.65.183,web-eq-03,infinite
    02:00:7a:76:03:4e,set:10_101_65_113,10.101.65.113,jumphost-eq-01,infinite
    02:00:6e:44:03:58,set:10_101_65_85,10.101.65.85,eq-01,infinite
    ~~~


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