$ kubectl logs envoy-nginx -c envoy
vppcom_app_create:1911: [1] configured debug level (3) from VCL_DEBUG!
vppcom_app_create:1920: [1] getenv 'VCL_CONFIG' failed!
open configuration file '/etc/vpp/vcl.conf' failed
vppcom_cfg_heapsize:1577: [1] allocated VCL heap = 0x7fc09dae1000, size 268435456 (0x10000000)
vppcom_cfg_read:1597: [1] open configuration file '/etc/vpp/vcl.conf' failed!
vppcom_app_create:1938: [1] configured namespace_id (70954c03fe1acc4c58967da622cad6710687c5c21495182678f1870c8d9a8e11) from VCL_APP_NAMESPACE_ID!
vppcom_app_create:1955: [1] configured namespace secret (42) from VCL_APP_NAMESPACE_ID!
vppcom_app_create:1964: [1] configured app_proxy_transport_tcp (1) from VCL_APP_PROXY_TRANSPORT_TCP!
vppcom_app_create:1980: [1] configured app_scope_local (1) from VCL_APP_SCOPE_LOCAL!
vppcom_app_create:1988: [1] configured app_scope_global (1) from VCL_APP_SCOPE_GLOBAL!
vppcom_app_create:2019: [1] sending session enable
vppcom_app_create:2030: [1] sending app attach
vppcom_app_create:2042: [1] app_name 'vcom-app-1', my_client_index 256 (0x100)
vppcom_app_create:1911: [7] configured debug level (3) from VCL_DEBUG!
vppcom_app_create:1920: [7] getenv 'VCL_CONFIG' failed!
open configuration file '/etc/vpp/vcl.conf' failed
vppcom_cfg_heapsize:1577: [7] allocated VCL heap = 0x7fe2593fc000, size 268435456 (0x10000000)
vppcom_cfg_read:1597: [7] open configuration file '/etc/vpp/vcl.conf' failed!
vppcom_app_create:1938: [7] configured namespace_id (70954c03fe1acc4c58967da622cad6710687c5c21495182678f1870c8d9a8e11) from VCL_APP_NAMESPACE_ID!
vppcom_app_create:1955: [7] configured namespace secret (42) from VCL_APP_NAMESPACE_ID!
vppcom_app_create:1964: [7] configured app_proxy_transport_tcp (1) from VCL_APP_PROXY_TRANSPORT_TCP!
vppcom_app_create:1980: [7] configured app_scope_local (1) from VCL_APP_SCOPE_LOCAL!
vppcom_app_create:1988: [7] configured app_scope_global (1) from VCL_APP_SCOPE_GLOBAL!
vppcom_app_create:2019: [7] sending session enable
vppcom_app_create:2030: [7] sending app attach
vppcom_app_create:2042: [7] app_name 'vcom-app-7', my_client_index 512 (0x200)
vppcom_epoll_create:3201: [7] Created vep_idx 0!
[2017-11-22 20:00:26.901][7][warning][main] source/server/server.cc:157] initializing epoch 0 (hot restart version=9.200.16384.127)

Connecting to VPP api... connected!

[7] vcom_init...done!

[7] vcom_constructor...done!
vppcom_session_create:2092: [7] sid 1
vppcom_session_bind:2224: [7] sid 1: bound to local address 127.0.0.1 port 9901, proto TCP
vppcom_session_listen:2260: [7] sid 1: sending bind request...
vl_api_bind_sock_reply_t_handler:933: [7] ERROR: sid 1: bind failed: Invalid value #2 (-8)
vppcom_session_listen:2271: [7] sid 1847726014: bind failed! returning -111 (1846718551)
[2017-11-22 20:00:26.915][7][critical][main] source/server/server.cc:71] error initializing configuration '/etc/envoy.json': cannot listen on socket: 127.0.0.1:9901
vppcom_session_close:2121: [7] sid 1: closing session...
vppcom_session_close:2187: [7] sid 1: session removed.
vppcom_session_close:2121: [7] sid 0: closing session...
vppcom_session_close:2187: [7] sid 0: session removed.
vppcom_app_destroy:2058: [7] detaching from VPP, my_client_index 512 (0x200)

[7] vcom_destroy...done!

[7] vcom_destructor...done!