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  1. ➜ k8s-the-ansible-way git:(master) ✗ kubectl get pods --all-namespaces -o wide
  2. NAMESPACE NAME READY STATUS RESTARTS AGE IP NODE
  3. default busybox 1/1 Running 0 4m 10.200.1.2 worker-2
  4. kube-system kube-dns-6c857864fb-ptdqc 3/3 Running 0 21m 10.200.0.2 worker-1
  5. kube-system weave-net-52x2l 2/2 Running 0 21m 10.240.0.21 worker-1
  6. kube-system weave-net-6htz7 2/2 Running 0 21m 10.240.0.22 worker-2
  7. ---
  8. ➜ k8s-the-ansible-way git:(master) ✗ kubectl get svc --all-namespaces
  9. NAMESPACE NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
  10. default kubernetes ClusterIP 10.32.0.1 <none> 443/TCP 7h
  11. kube-system kube-dns ClusterIP 10.32.0.10 <none> 53/UDP,53/TCP 22m
  12. ---
  13. ➜ k8s-the-ansible-way git:(master) ✗ kubectl exec -it busybox sh
  14. / # nslookup kubernetes
  15. Server: 10.32.0.10
  16. Address 1: 10.32.0.10
  17.  
  18. nslookup: can't resolve 'kubernetes'
  19. ---
  20. TCPDUMP
  21.  
  22. tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes
  23. 07:52:01.654230 IP (tos 0x0, ttl 63, id 19305, offset 0, flags [DF], proto UDP (17), length 69)
  24. worker-2.53660 > 10.200.0.2.domain: [bad udp cksum 0x171b -> 0x0234!] 2+ PTR? 10.0.32.10.in-addr.arpa. (41)
  25. 07:52:01.663079 IP (tos 0x0, ttl 64, id 962, offset 0, flags [DF], proto UDP (17), length 69)
  26. worker-2.41965 > 10.0.2.3.domain: [bad udp cksum 0x1854 -> 0xb2ba!] 56211+ PTR? 2.0.200.10.in-addr.arpa. (41)
  27. 07:52:01.696737 IP (tos 0x10, ttl 64, id 20652, offset 0, flags [none], proto UDP (17), length 69)
  28. 10.0.2.3.domain > worker-2.41965: [udp sum ok] 56211 NXDomain q: PTR? 2.0.200.10.in-addr.arpa. 0/0/0 (41)
  29. 07:52:01.699365 IP (tos 0x0, ttl 64, id 990, offset 0, flags [DF], proto UDP (17), length 68)
  30. worker-2.36396 > 10.0.2.3.domain: [bad udp cksum 0x1853 -> 0xd3a1!] 42694+ PTR? 15.2.0.10.in-addr.arpa. (40)
  31. 07:52:01.700713 IP (tos 0x10, ttl 64, id 20653, offset 0, flags [none], proto UDP (17), length 68)
  32. 10.0.2.3.domain > worker-2.36396: [udp sum ok] 42694 NXDomain q: PTR? 15.2.0.10.in-addr.arpa. 0/0/0 (40)
  33. 07:52:01.705868 IP (tos 0x0, ttl 64, id 992, offset 0, flags [DF], proto UDP (17), length 67)
  34. worker-2.33768 > 10.0.2.3.domain: [bad udp cksum 0x1852 -> 0x87c7!] 22719+ PTR? 3.2.0.10.in-addr.arpa. (39)
  35. 07:52:01.707031 IP (tos 0x10, ttl 64, id 20654, offset 0, flags [none], proto UDP (17), length 67)
  36. 10.0.2.3.domain > worker-2.33768: [udp sum ok] 22719 NXDomain q: PTR? 3.2.0.10.in-addr.arpa. 0/0/0 (39)
  37. 07:52:06.662591 IP (tos 0x0, ttl 63, id 22134, offset 0, flags [DF], proto UDP (17), length 69)
  38. worker-2.44174 > 10.200.0.2.domain: [bad udp cksum 0x171b -> 0x2741!] 3+ PTR? 10.0.32.10.in-addr.arpa. (41)
  39. 07:52:06.666121 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has 10.0.2.3 tell worker-2, length 28
  40. 07:52:06.666449 ARP, Ethernet (len 6), IPv4 (len 4), Reply 10.0.2.3 is-at 52:54:00:12:35:03 (oui Unknown), length 46
  41. 07:52:11.668253 IP (tos 0x0, ttl 63, id 26063, offset 0, flags [DF], proto UDP (17), length 69)
  42. worker-2.54029 > 10.200.0.2.domain: [bad udp cksum 0x171b -> 0x00c1!] 4+ PTR? 10.0.32.10.in-addr.arpa. (41)
  43. 07:52:16.670950 IP (tos 0x0, ttl 63, id 29024, offset 0, flags [DF], proto UDP (17), length 69)
  44. worker-2.37477 > 10.200.0.2.domain: [bad udp cksum 0x171b -> 0x4168!] 5+ PTR? 10.0.32.10.in-addr.arpa. (41)
  45. 07:52:21.672100 IP (tos 0x0, ttl 63, id 33631, offset 0, flags [DF], proto UDP (17), length 82)
  46. worker-2.39603 > 10.200.0.2.domain: [bad udp cksum 0x1728 -> 0x8baa!] 6+ AAAA? kubernetes.default.svc.cluster.local. (54)
  47. 07:52:26.681391 IP (tos 0x0, ttl 63, id 36987, offset 0, flags [DF], proto UDP (17), length 82)
  48. worker-2.37204 > 10.200.0.2.domain: [bad udp cksum 0x1728 -> 0x9508!] 7+ AAAA? kubernetes.default.svc.cluster.local. (54)
  49. 07:52:31.688604 IP (tos 0x0, ttl 63, id 37923, offset 0, flags [DF], proto UDP (17), length 82)
  50. worker-2.40641 > 10.200.0.2.domain: [bad udp cksum 0x1728 -> 0x879a!] 8+ AAAA? kubernetes.default.svc.cluster.local. (54)
  51. 07:52:31.690182 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has gateway tell worker-2, length 28
  52. 07:52:31.692085 ARP, Ethernet (len 6), IPv4 (len 4), Reply gateway is-at 52:54:00:12:35:02 (oui Unknown), length 46
  53. 07:52:31.692281 IP (tos 0x0, ttl 64, id 19791, offset 0, flags [DF], proto UDP (17), length 67)
  54. worker-2.50261 > 10.0.2.3.domain: [bad udp cksum 0x1852 -> 0x08ad!] 38765+ PTR? 2.2.0.10.in-addr.arpa. (39)
  55. 07:52:31.693862 IP (tos 0x10, ttl 64, id 20655, offset 0, flags [none], proto UDP (17), length 67)
  56. 10.0.2.3.domain > worker-2.50261: [udp sum ok] 38765 NXDomain q: PTR? 2.2.0.10.in-addr.arpa. 0/0/0 (39)
  57. 07:52:36.694605 IP (tos 0x0, ttl 63, id 38972, offset 0, flags [DF], proto UDP (17), length 82)
  58. worker-2.40068 > 10.200.0.2.domain: [bad udp cksum 0x1728 -> 0x89d6!] 9+ AAAA? kubernetes.default.svc.cluster.local. (54)
  59. 07:52:38.140187 IP (tos 0xc0, ttl 64, id 57764, offset 0, flags [DF], proto UDP (17), length 76)
  60. worker-2.ntp > host209-165-213-188.serverdedicati.aruba.it.ntp: [bad udp cksum 0x6eff -> 0x4f16!] NTPv4, length 48
  61. Client, Leap indicator: (0), Stratum 2 (secondary reference), poll 7 (128s), precision -23
  62. Root Delay: 0.036254, Root dispersion: 0.042694, Reference-ID: 93-62-246-196.ip25.fastwebnet.it
  63. Reference Timestamp: 3730431100.633723668 (2018/03/19 07:51:40)
  64. Originator Timestamp: 3730431023.149869012 (2018/03/19 07:50:23)
  65. Receive Timestamp: 3730431023.205710982 (2018/03/19 07:50:23)
  66. Transmit Timestamp: 3730431158.140131010 (2018/03/19 07:52:38)
  67. Originator - Receive Timestamp: +0.055841970
  68. Originator - Transmit Timestamp: +134.990261998
  69. 07:52:38.141911 IP (tos 0x0, ttl 64, id 21537, offset 0, flags [DF], proto UDP (17), length 74)
  70. worker-2.47231 > 10.0.2.3.domain: [bad udp cksum 0x1859 -> 0xc936!] 29848+ PTR? 209.165.213.188.in-addr.arpa. (46)
  71. 07:52:38.144533 IP (tos 0x10, ttl 64, id 20656, offset 0, flags [none], proto UDP (17), length 131)
  72. 10.0.2.3.domain > worker-2.47231: [udp sum ok] 29848 q: PTR? 209.165.213.188.in-addr.arpa. 1/0/0 209.165.213.188.in-addr.arpa. [1h] PTR host209-165-213-188.serverdedicati.aruba.it. (103)
  73. 07:52:38.145881 IP (tos 0x0, ttl 64, id 21538, offset 0, flags [DF], proto UDP (17), length 72)
  74. worker-2.41441 > 10.0.2.3.domain: [bad udp cksum 0x1857 -> 0x2fa2!] 8244+ PTR? 196.246.62.93.in-addr.arpa. (44)
  75. 07:52:38.148330 IP (tos 0x10, ttl 64, id 20657, offset 0, flags [none], proto UDP (17), length 118)
  76. 10.0.2.3.domain > worker-2.41441: [udp sum ok] 8244 q: PTR? 196.246.62.93.in-addr.arpa. 1/0/0 196.246.62.93.in-addr.arpa. [1h] PTR 93-62-246-196.ip25.fastwebnet.it. (90)
  77. 07:52:38.180351 IP (tos 0x0, ttl 64, id 20658, offset 0, flags [none], proto UDP (17), length 76)
  78. host209-165-213-188.serverdedicati.aruba.it.ntp > worker-2.ntp: [udp sum ok] NTPv4, length 48
  79. Server, Leap indicator: (0), Stratum 2 (secondary reference), poll 7 (128s), precision -23
  80. Root Delay: 0.013366, Root dispersion: 0.039688, Reference-ID: ntp2.inrim.it
  81. Reference Timestamp: 3730430222.657789800 (2018/03/19 07:37:02)
  82. Originator Timestamp: 3730431158.140131010 (2018/03/19 07:52:38)
  83. Receive Timestamp: 3730431158.125046986 (2018/03/19 07:52:38)
  84. Transmit Timestamp: 3730431158.125081207 (2018/03/19 07:52:38)
  85. Originator - Receive Timestamp: -0.015084023
  86. Originator - Transmit Timestamp: -0.015049802
  87. 07:52:38.180708 IP (tos 0x0, ttl 64, id 21554, offset 0, flags [DF], proto UDP (17), length 74)
  88. worker-2.46846 > 10.0.2.3.domain: [bad udp cksum 0x1859 -> 0xbe43!] 33559+ PTR? 233.114.204.193.in-addr.arpa. (46)
  89. 07:52:38.241517 IP (tos 0x10, ttl 64, id 20659, offset 0, flags [none], proto UDP (17), length 101)
  90. 10.0.2.3.domain > worker-2.46846: [udp sum ok] 33559 q: PTR? 233.114.204.193.in-addr.arpa. 1/0/0 233.114.204.193.in-addr.arpa. [1h] PTR ntp2.inrim.it. (73)
  91. 07:52:41.695358 IP (tos 0x0, ttl 63, id 42714, offset 0, flags [DF], proto UDP (17), length 82)
  92. worker-2.56422 > 10.200.0.2.domain: [bad udp cksum 0x1728 -> 0x4a0e!] 10+ A? kubernetes.default.svc.cluster.local. (54)
  93. 07:52:43.102681 IP (tos 0xc0, ttl 64, id 41984, offset 0, flags [DF], proto UDP (17), length 76)
  94. worker-2.ntp > host22-187-177-94.serverdedicati.aruba.it.ntp: [bad udp cksum 0x2620 -> 0x7c4f!] NTPv4, length 48
  95. Client, Leap indicator: (0), Stratum 2 (secondary reference), poll 7 (128s), precision -23
  96. Root Delay: 0.036254, Root dispersion: 0.042770, Reference-ID: 93-62-246-196.ip25.fastwebnet.it
  97. Reference Timestamp: 3730431100.633723668 (2018/03/19 07:51:40)
  98. Originator Timestamp: 3730431029.092350858 (2018/03/19 07:50:29)
  99. Receive Timestamp: 3730431029.149176521 (2018/03/19 07:50:29)
  100. Transmit Timestamp: 3730431163.102622029 (2018/03/19 07:52:43)
  101. Originator - Receive Timestamp: +0.056825663
  102. Originator - Transmit Timestamp: +134.010271170
  103. 07:52:43.103134 IP (tos 0x0, ttl 64, id 24175, offset 0, flags [DF], proto UDP (17), length 72)
  104. worker-2.36494 > 10.0.2.3.domain: [bad udp cksum 0x1857 -> 0x7fff!] 34438+ PTR? 22.187.177.94.in-addr.arpa. (44)
  105. 07:52:43.104619 IP (tos 0x10, ttl 64, id 20660, offset 0, flags [none], proto UDP (17), length 127)
  106. 10.0.2.3.domain > worker-2.36494: [udp sum ok] 34438 q: PTR? 22.187.177.94.in-addr.arpa. 1/0/0 22.187.177.94.in-addr.arpa. [1h] PTR host22-187-177-94.serverdedicati.aruba.it. (99)
  107. 07:52:43.148398 IP (tos 0x0, ttl 64, id 20661, offset 0, flags [none], proto UDP (17), length 76)
  108. host22-187-177-94.serverdedicati.aruba.it.ntp > worker-2.ntp: [udp sum ok] NTPv4, length 48
  109. Server, Leap indicator: (0), Stratum 3 (secondary reference), poll 7 (128s), precision -23
  110. Root Delay: 0.028244, Root dispersion: 0.048309, Reference-ID: 52.239.121.49
  111. Reference Timestamp: 3730430784.854491326 (2018/03/19 07:46:24)
  112. Originator Timestamp: 3730431163.102622029 (2018/03/19 07:52:43)
  113. Receive Timestamp: 3730431163.090347945 (2018/03/19 07:52:43)
  114. Transmit Timestamp: 3730431163.090379053 (2018/03/19 07:52:43)
  115. Originator - Receive Timestamp: -0.012274083
  116. Originator - Transmit Timestamp: -0.012242976
  117. 07:52:43.148866 IP (tos 0x0, ttl 64, id 24219, offset 0, flags [DF], proto UDP (17), length 72)
  118. worker-2.37728 > 10.0.2.3.domain: [bad udp cksum 0x1857 -> 0x9ea4!] 25369+ PTR? 49.121.239.52.in-addr.arpa. (44)
  119. 07:52:43.277616 IP (tos 0x10, ttl 64, id 20662, offset 0, flags [none], proto UDP (17), length 72)
  120. 10.0.2.3.domain > worker-2.37728: [udp sum ok] 25369 NXDomain q: PTR? 49.121.239.52.in-addr.arpa. 0/0/0 (44)
  121. 07:52:46.700191 IP (tos 0x0, ttl 63, id 47441, offset 0, flags [DF], proto UDP (17), length 82)
  122. worker-2.49150 > 10.200.0.2.domain: [bad udp cksum 0x1728 -> 0x6675!] 11+ A? kubernetes.default.svc.cluster.local. (54)
  123. 07:52:47.102608 IP (tos 0xc0, ttl 64, id 39586, offset 0, flags [DF], proto UDP (17), length 76)
  124. worker-2.ntp > 93-62-246-196.ip25.fastwebnet.it.ntp: [bad udp cksum 0x605b -> 0x6b08!] NTPv4, length 48
  125. Client, Leap indicator: (0), Stratum 2 (secondary reference), poll 7 (128s), precision -23
  126. Root Delay: 0.036254, Root dispersion: 0.042831, Reference-ID: 93-62-246-196.ip25.fastwebnet.it
  127. Reference Timestamp: 3730431100.633723668 (2018/03/19 07:51:40)
  128. Originator Timestamp: 3730431101.142268122 (2018/03/19 07:51:41)
  129. Receive Timestamp: 3730431101.198077355 (2018/03/19 07:51:41)
  130. Transmit Timestamp: 3730431167.102554830 (2018/03/19 07:52:47)
  131. Originator - Receive Timestamp: +0.055809232
  132. Originator - Transmit Timestamp: +65.960286708
  133. 07:52:47.259778 IP (tos 0x0, ttl 64, id 20663, offset 0, flags [none], proto UDP (17), length 76)
  134. 93-62-246-196.ip25.fastwebnet.it.ntp > worker-2.ntp: [udp sum ok] NTPv4, length 48
  135. Server, Leap indicator: (0), Stratum 1 (primary reference), poll 4 (16s), precision -25
  136. Root Delay: 0.000000, Root dispersion: 0.000000, Reference-ID: GPS^@
  137. Reference Timestamp: 3730431167.000000000 (2018/03/19 07:52:47)
  138. Originator Timestamp: 3730431167.102554830 (2018/03/19 07:52:47)
  139. Receive Timestamp: 3730431167.203561008 (2018/03/19 07:52:47)
  140. Transmit Timestamp: 3730431167.203566828 (2018/03/19 07:52:47)
  141. Originator - Receive Timestamp: +0.101006177
  142. Originator - Transmit Timestamp: +0.101011997
  143. 07:52:51.703515 IP (tos 0x0, ttl 63, id 48775, offset 0, flags [DF], proto UDP (17), length 82)
  144. worker-2.50186 > 10.200.0.2.domain: [bad udp cksum 0x1728 -> 0x6268!] 12+ A? kubernetes.default.svc.cluster.local. (54)
  145. 07:52:56.708674 IP (tos 0x0, ttl 63, id 50597, offset 0, flags [DF], proto UDP (17), length 82)
  146. worker-2.46421 > 10.200.0.2.domain: [bad udp cksum 0x1728 -> 0x711c!] 13+ A? kubernetes.default.svc.cluster.local. (54)
  147. 07:52:59.112121 IP (tos 0xc0, ttl 64, id 63660, offset 0, flags [DF], proto UDP (17), length 76)
  148. worker-2.ntp > swiftdesign.us.ntp: [bad udp cksum 0x3036 -> 0xb69e!] NTPv4, length 48
  149. Client, Leap indicator: (0), Stratum 2 (secondary reference), poll 7 (128s), precision -23
  150. Root Delay: 0.038879, Root dispersion: 0.039688, Reference-ID: 93-62-246-196.ip25.fastwebnet.it
  151. Reference Timestamp: 3730431166.624591655 (2018/03/19 07:52:46)
  152. Originator Timestamp: 3730431044.099080070 (2018/03/19 07:50:44)
  153. Receive Timestamp: 3730431044.152195367 (2018/03/19 07:50:44)
  154. Transmit Timestamp: 3730431179.111996242 (2018/03/19 07:52:59)
  155. Originator - Receive Timestamp: +0.053115296
  156. Originator - Transmit Timestamp: +135.012916171
  157. 07:52:59.112622 IP (tos 0x0, ttl 64, id 37041, offset 0, flags [DF], proto UDP (17), length 72)
  158. worker-2.36082 > 10.0.2.3.domain: [bad udp cksum 0x1857 -> 0x8bbb!] 53006+ PTR? 38.98.183.193.in-addr.arpa. (44)
  159. 07:52:59.113898 IP (tos 0x10, ttl 64, id 20664, offset 0, flags [none], proto UDP (17), length 100)
  160. 10.0.2.3.domain > worker-2.36082: [udp sum ok] 53006 q: PTR? 38.98.183.193.in-addr.arpa. 1/0/0 38.98.183.193.in-addr.arpa. [1h] PTR swiftdesign.us. (72)
  161. 07:52:59.146714 IP (tos 0x0, ttl 64, id 20665, offset 0, flags [none], proto UDP (17), length 76)
  162. swiftdesign.us.ntp > worker-2.ntp: [udp sum ok] NTPv4, length 48
  163. Server, Leap indicator: (0), Stratum 2 (secondary reference), poll 7 (128s), precision -21
  164. Root Delay: 0.002853, Root dispersion: 0.000503, Reference-ID: ntp1.inrim.it
  165. Reference Timestamp: 3730430778.987927121 (2018/03/19 07:46:18)
  166. Originator Timestamp: 3730431179.111996242 (2018/03/19 07:52:59)
  167. Receive Timestamp: 3730431179.095777406 (2018/03/19 07:52:59)
  168. Transmit Timestamp: 3730431179.095819984 (2018/03/19 07:52:59)
  169. Originator - Receive Timestamp: -0.016218836
  170. Originator - Transmit Timestamp: -0.016176258
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