sorted out inbox

3 files changed, 66 insertions, 0 deletions

diff --git a/4 archive/Blkio errors.md b/4 archive/Blkio errors.md
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+Dmesg is spewing blkio errors
+
+Find out which device: e.g dm-4, then:
+```
+sudo virsh list --all --name | while read dom; do sudo virsh dumpxml $dom | grep dm-4 && echo $dom; done
+```
+To find which domain
+After which:
+```
+sudo virsh dumpxml $domain
+```
+to find the hostname 
+
+reboot it hard.
\ No newline at end of file
diff --git a/4 archive/Issues met TC oplossen.md b/4 archive/Issues met TC oplossen.md
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+Probleem: referenties in ovs naar devices die niet meer bestaan. Hij probeert vervolgens een nieuw device aan te maken  met een qdisc op zo'n niet bestaande device.
+
+```
+sudo grep -r 'could not open network device' /var/log/openvswitch/ | grep -oi 'tap[a-z0-9\-]*' | uniq > ports_no_device
+```
+```
+sudo ip l l | grep ports_no_device | grep -oi 'tap[a-z0-9\-]*' > ports_with_device
+```
+```
+for P in $(cat ports_no_device | grep -v -f ports_with_device); do sudo ovs-vsctl del-port $P; done
+```
+```
+sudo systemctl restart ovn-controller
+```
+
+
+Rutger versie:
+```
+sudo grep 'could not open network device' /var/log/openvswitch/ovs-vswitchd.log | grep -oi 'tap[a-z0-9\-]*' | sort | uniq | while read dev; do ip l l $dev || sudo ovs-vsctl del-port $dev; done; sudo systemctl restart ovn-controller
+```
+
+
+Dus: ovs-vsctl del-port is nice.
+
+Niet vergeten ovn-controller te herstarten.
diff --git a/4 archive/antagonist_migratie.md b/4 archive/antagonist_migratie.md
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+Migrate VMs 
+
+Not managed by customers, only Antagonist managed
+Most of it is backoffice, only few are front facing
+
+Ovirt (KVM)
+
+
+Possible to change IPs?
+
+Difficulty: private networking between hosts
+	     databases only ones in the private network
+	     
+	     Should be possible to switch IPs
+
+
+Outsourced routers to DC provider, more difficult to integrate networks
+
+Most of the things can be redeployed, Rutger notes that maybe all they need is access
+
+We can use their left-over IP space
+
+Features
+- requires internal network, so want to create networks/routers
+- HA/automatic failover? -> Not yet
+- Anti-affinity rules? Dont want all the LBs on the same (failing) node
+