Graphite load & process data null since 27th:
{F3318047}
http://tools.wmflabs.org/?status shows `tools-exec-1213 Load: 0% Memory: 0% Free vmem: 12.1G`
SSH connections fail:
```
12:07:50 0 ✓ zhuyifei1999@tools-bastion-02: ~$ ssh -vvv tools-exec-1213
OpenSSH_6.9p1 Ubuntu-2~trusty1, OpenSSL 1.0.1f 6 Jan 2014
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 20: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to tools-exec-1213 [10.68.17.252] port 22.
debug1: Connection established.
debug1: key_load_private_type: No such file or directory
debug1: key_load_private_cert: Permission denied
debug1: key_load_private_cert: Permission denied
debug1: key_load_private_cert: Permission denied
debug1: key_load_private_cert: Permission denied
debug1: key_load_private_type: Permission denied
debug1: key_load_private_type: Permission denied
debug1: key_load_private_type: Permission denied
debug1: key_load_private_type: Permission denied
debug1: key_load_cert: No such file or directory
debug1: key_load_cert: No such file or directory
debug1: key_load_cert: No such file or directory
debug1: key_load_cert: No such file or directory
debug1: key_load_public: No such file or directory
debug1: identity file /home/zhuyifei1999/.ssh/id_rsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/zhuyifei1999/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/zhuyifei1999/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/zhuyifei1999/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/zhuyifei1999/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/zhuyifei1999/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/zhuyifei1999/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/zhuyifei1999/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.9p1 Ubuntu-2~trusty1
ssh_exchange_identification: read: Connection reset by peer
```