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  1. OpenShift Bugs
  2. OCPBUGS-15424

[4.12z] Duplicate acls cause network policy failure for namespaces with long names (>61 chars)

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      Description of problem:

      By creating network policies with a namespace that has maximum length, it can end up causing this error:
      
      2023-06-22T17:34:40.804880959Z I0622 17:34:40.804851       1 obj_retry.go:318] Retry add failed for *v1.NetworkPolicy ocm-production-24gfm4t0rtdsg01bcqgihdrceh3t59na-mshen-incident/kas, will try again later: failed to create Network Policy ocm-production-24gfm4t0rtdsg01bcqgihdrceh3t59na-mshen-incident/kas: failed to create default deny port groups: error in transact with ops [
      {Op:update Table:ACL Row:map[action:drop direction:to-lport external_ids:{GoMap:map[default-deny-policy-type:Ingress]} log:false match:outport == @a7686019953911959437_ingressDefaultDeny meter:{GoSet:[acl-logging]} name:{GoSet:[ocm-production-24gfm4t0rtdsg01bcqgihdrceh3t59na-mshen-incident_]} priority:1000] Rows:[] Columns:[] Mutations:[] Timeout:<nil> Where:[where column _uuid == {08cc8026-4c22-4c52-99cd-e8cd1469c8bd}] Until: Durable:<nil> Comment:<nil> Lock:<nil> UUIDName:} {Op:update Table:ACL Row:map[action:allow direction:to-lport external_ids:{GoMap:map[default-deny-policy-type:Ingress]} log:false match:outport == @a7686019953911959437_ingressDefaultDeny && (arp || nd) meter:{GoSet:[acl-logging]} name:{GoSet:[ocm-production-24gfm4t0rtdsg01bcqgihdrceh3t59na-mshen-incident_]} priority:1001] Rows:[] Columns:[] Mutations:[] Timeout:<nil> Where:[where column _uuid == {08cc8026-4c22-4c52-99cd-e8cd1469c8bd}] Until: Durable:<nil> Comment:<nil> Lock:<nil> UUIDName:} {Op:update Table:ACL Row:map[action:drop direction:from-lport external_ids:{GoMap:map[default-deny-policy-type:Egress]} log:false match:inport == @a7686019953911959437_egressDefaultDeny meter:{GoSet:[acl-logging]} name:{GoSet:[ocm-production-24gfm4t0rtdsg01bcqgihdrceh3t59na-mshen-incident_]} options:{GoMap:map[apply-after-lb:true]} priority:1000] Rows:[] Columns:[] Mutations:[] Timeout:<nil> Where:[where column _uuid == {f324353c-a47b-4044-9cd9-dbeef058ada3}] Until: Durable:<nil> Comment:<nil> Lock:<nil> UUIDName:}{Op:update Table:ACL Row:map[action:allow direction:from-lport external_ids:{GoMap:map[default-deny-policy-type:Egress]} log:false match:inport == @a7686019953911959437_egressDefaultDeny && (arp || nd) meter:{GoSet:[acl-logging]} name:{GoSet:[ocm-production-24gfm4t0rtdsg01bcqgihdrceh3t59na-mshen-incident_]} options:{GoMap:map[apply-after-lb:true]} priority:1001] Rows:[] Columns:[] Mutations:[] Timeout:<nil> Where:[where column _uuid == {f324353c-a47b-4044-9cd9-dbeef058ada3}] Until: Durable:<nil> Comment:<nil> Lock:<nil> UUIDName:}{Op:update Table:Port_Group Row:map[acls:{GoSet:[{GoUUID:08cc8026-4c22-4c52-99cd-e8cd1469c8bd} {GoUUID:08cc8026-4c22-4c52-99cd-e8cd1469c8bd}]} external_ids:{GoMap:map[name:a7686019953911959437_ingressDefaultDeny]} ports:{GoSet:[]}] Rows:[] Columns:[] Mutations:[] Timeout:<nil> Where:[where column _uuid == {d3b52500-963a-4f7b-8928-d869f298d2e8}] Until: Durable:<nil> Comment:<nil> Lock:<nil> UUIDName:}{Op:update Table:Port_Group Row:map[acls:{GoSet:[{GoUUID:f324353c-a47b-4044-9cd9-dbeef058ada3} {GoUUID:f324353c-a47b-4044-9cd9-dbeef058ada3}]} external_ids:{GoMap:map[name:a7686019953911959437_egressDefaultDeny]} ports:{GoSet:[]}] Rows:[] Columns:[] Mutations:[] Timeout:<nil> Where:[where column _uuid == {b128baec-6acd-4683-8c12-5b968bf73bd8}] Until: Durable:<nil> Comment:<nil> Lock:<nil> UUIDName:}]results [{Count:1 Error: Details: UUID:{GoUUID:} Rows:[]} {Count:1 Error: Details: UUID:{GoUUID:} Rows:[]} {Count:1 Error: Details: UUID:{GoUUID:} Rows:[]} {Count:1 Error: Details: UUID:{GoUUID:} Rows:[]} {Count:0 Error:ovsdb error Details:set contains duplicate UUID:{GoUUID:} Rows:[]} {Count:0 Error: Details: UUID:{GoUUID:} Rows:[]}] and errors [ovsdb error: set contains duplicate]: 1 ovsdb operations failed
      

       

      This is not a problem in 4.14 as we moved to ACL indexes, but in 4.13 and before we compare the ACL name and the external ids. For default deny ACLs we simply store the direction in the external id, and the name of the ACL is limited to 63 characters in OVN. When we create default deny acls, we create one that denies everything, then we also create some allow acls to permit arp and neighbor discovery traffic. These 2 ACLs may be recognized as duplicate because their truncated name (namespace only) and their directions in external ids match.

       

              npinaeva@redhat.com Nadia Pinaeva
              npinaeva@redhat.com Nadia Pinaeva
              Arti Sood Arti Sood
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