[GitHub] [cloudstack] DmB991 opened a new issue #3513: Incorrect isolated network creation

[GitBox <gi...@apache.org>]

DmB991 opened a new issue #3513: Incorrect isolated network creation
URL: https://github.com/apache/cloudstack/issues/3513
 
 
   ##### ISSUE TYPE
    * Bug Report
   
   ##### COMPONENT NAME
   ~~~
   agent
   isolated networks
   ~~~
   
   ##### CLOUDSTACK VERSION
   ~~~
   4.11.2.0
   ~~~
   
   ##### CONFIGURATION
   NA
   
   ##### OS / ENVIRONMENT
   - Centos 7
   - kernel 5.1.14-1.el7.elrepo.x86_64
   - qemu-kvm-ev 2.12.0
   - libvirt 4.5.0
   - separate storage with nfsv3/v4 and zfs
   - MariaDB 10.4.6
   
   ##### SUMMARY
   Incorrect isolated network creation when huge amount of VMs and networks already created async.
   
   ##### STEPS TO REPRODUCE
   1. Create guest network.
   2. Create network offering for isolated network with default settings and without any supported services.
   3. Create isolated network with network offering above.
   4. Create and destroy(after few minutes) 2 VMs async with networks above.
   5. Perform 3-4 points async huge amount times (from 1000 to 2000 times).
   
   ##### ACTUAL RESULTS
   After STEPS TO REPRODUCE we see two machines with names 'redistr-200-28424-smoke-gre-425-20e8ff03'(i-2-322138-VM) and 'redistr-200-28424-smoke-gre-425-7fcc1e3a'(i-2-322566-VM).
   Each machine has guest(shared4) and isolated network(redistr-200-28424-smoke-gre-425-0)  .
   ![net](https://user-images.githubusercontent.com/3996198/61744175-517c0b80-ad9f-11e9-9de6-27d44aae4cf6.png)
   ![vms_of_net](https://user-images.githubusercontent.com/3996198/61744176-5214a200-ad9f-11e9-80cf-a518826f8b7f.png)
   
   We can ping from one VM to another VM throught eth0, but we can't ping throught eth1.
   On the first cloudstack host we see that vnet301(eth1) of i-2-322566-VM in the brenp8s0f0-1016 and we see request in modifyvlan.sh for create bridge and add vlan to it.
   On the second cloudstack host we don't see any bridge or vlan with 1016 in the name of interfaces and we don't see any requst for creation it in the modifyvlan.sh.
   We see that vnet126 in another bridge brenp1s0-2889.
   [first-host-request-create-vm.log](https://github.com/apache/cloudstack/files/3423905/from-first-host-agent.log)
   [second-host-request-create-vm.log](https://github.com/apache/cloudstack/files/3423906/from-second-host-agent.log)
   
   * modifyvlan.sh = /usr/share/cloudstack-common/scripts/vm/network/vnet/modifyvlan.sh (or https://github.com/apache/cloudstack/blob/master/scripts/vm/network/vnet/modifyvlan.sh)
   
   ##### EXPECTED RESULTS
   ~~~
   On the second cloudstack host brNAME-1016 are created with vnet126 included for i-2-322138-VM.
   ~~~
   

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