Troubleshooting On-Premises Installation
Collect Troubleshooting Data
When experiencing issues, you can collect troubleshooting data that can
help the support team. The data can be collected by hand, or Sysdig
provides a very simple
get_support_bundle.sh script that takes as an
argument the namespace where Sysdig is deployed and will generate a
tarball containing some information (mostly log files). The script is
located in the GitHub repository.
$ ./scripts/get_support_bundle.sh sysdigcloud Getting support logs for sysdigcloud-api-1477528018-4od59 Getting support logs for sysdigcloud-api-1477528018-ach89 Getting support logs for sysdigcloud-cassandra-2987866586-fgcm8 Getting support logs for sysdigcloud-collector-2526360198-e58uy Getting support logs for sysdigcloud-collector-2526360198-v1egg Getting support logs for sysdigcloud-mysql-2388886613-a8a12 Getting support logs for sysdigcloud-redis-1701952711-ezg8q Getting support logs for sysdigcloud-worker-1086626503-4cio9 Getting support logs for sysdigcloud-worker-1086626503-sdtrc Support bundle generated: 1473897425_sysdig_cloud_support_bundle.tgz
Docker Connectivity Issues (IPv4/IPv6)
Some issues with IPv4 and IPv6 interconnectivity between on-premises containers and the outside world have been detected.
IP packet forwarding is governed by the
ip_forward system parameter.
Packets can only pass between containers if this parameter is
Usually, you will simply leave the Docker server at its default setting
--ip-forward=true and Docker will go set
1 for you
when the server starts up. If you set
--ip-forward=false and your
system’s kernel has it enabled, the
--ip-forward=false option has no
To check the setting on your kernel use:
To turn it on use:
Please see this article from docker for more details on Docker Connectivity.
Prior to installing ensure your proxy settings are valid for the
session. You can use
wget to test internet
export http_proxy="http://user:password@proxy_server:port" export https_proxy="https://user:password@proxy_server:port" echo $http_proxy
You can then attempt a curl or docker hub call to ensure outside connectivity.
Prior to installation, you may want to disable local firewall (iptables) to rule out local connectivity issues.
However here are some details around Sysdig connectivity and backend connectivity requirements.
6443 Agent communication
443 Sysdig Monitor UI access
8800 Management console access
Here are specifics around what is used for connectivity for the Sysdig backend for on-premises solution:
File Write Permissions Issues (SELINUX or APP ARMOR)
During the install, you may see errors writing to volumes such as
/opt) from either the onprem install scripts or Docker. You
SELINUX (CENTOS/RHEL) or
during the course of the install so the valid directories can be
created. This can be accomplished by:
From the command line, edit the
/etc/sysconfig/selinux file. This file
is a symlink to
/etc/selinux/config. The configuration file is
self-explanatory. Changing the value of
SELINUXTYPE*changes the state of SELinux and the name of the policy
to be used the next time the system boots.
[root@host2a ~]# cat /etc/sysconfig/selinux # This file controls the state of SELinux on the system. # SELINUX= can take one of these three values: # enforcing - SELinux security policy is enforced. # permissive - SELinux prints warnings instead of enforcing. # disabled - SELinux is fully disabled. SELINUX=permissive # SELINUXTYPE= type of policy in use. Possible values are: # targeted - Only targeted network daemons are protected. # strict - Full SELinux protection. SELINUXTYPE=targeted # SETLOCALDEFS= Check local definition changes SETLOCALDEFS=0
See SELinux Modes for more information.
AppArmor can be disabled, and the kernel module unloaded by entering the following:
sudo systemctl stop apparmor.service sudo update-rc.d -f apparmor remove
To re-enable AppArmor enter:
sudo systemctl start apparmor.service sudo update-rc.d apparmor defaults
Advanced Troubleshooting - Firewall, IPtables, IP forwarding
In the preflight check step with Replicated, if you come across the error:
getsockopt: no route to host
Please do the following:
For CentOS 7/RedHat:
Log in as root or run these commands via sudo:
service firewalld stop systemctl disable firewalld sysctl -w net.ipv4.ip_forward=1 iptables -F setenforce 0 service docker restart
Log in as root or run these commands via sudo:
sysctl -w net.ipv4.ip_forward=1 systemctl stop apparmor.service update-rc.d -f apparmor remove ufw disable iptables -F service docker restart
See Get Help | Using Sysdig Support (On-Prem).
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