-
Notifications
You must be signed in to change notification settings - Fork 796
/
nitro_check_script.sh
171 lines (142 loc) · 7.94 KB
/
nitro_check_script.sh
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
#!/bin/bash
########################################################################
# Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"). You may not use this file
# except in compliance with the License. A copy of the License is located at
#
# http://aws.amazon.com/apache2.0/
#
# or in the "license" file accompanying this file. This file is distributed on an "AS IS"
# BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations under the License.
check_NVMe_in_initrd () {
find_distro=`cat /etc/os-release |sed -n 's|^ID="\([a-z]\{4\}\).*|\1|p'` # Check if instance is using amazon AMI.
if [ -f /etc/redhat-release ] ; then
# Distribution is Red hat
lsinitrd /boot/initramfs-$(uname -r).img|grep nvme > /dev/null 2>&1
if [ $? -ne 0 ]; then
# NVMe module is not loaded in initrd/initramfs
echo -e "\n\nERROR NVMe Module is not loaded in the initramfs image.\n\t- Please run the following command on your instance to recreate initramfs:"
echo -e '\t# sudo dracut -f -v'
fi
elif [[ "${find_distro}" == "amzn" ]]; then
# Amazon Linux
lsinitrd /boot/initramfs-$(uname -r).img|grep nvme > /dev/null 2>&1
if [ $? -ne 0 ]; then
# NVMe module is not loaded in initrd/initramfs
echo -e "\n\nERROR NVMe Module is not loaded in the initramfs image.\n\t- Please run the following command on your instance to recreate initramfs:"
echo -e '\t# sudo dracut -f -v'
fi
elif [[ "${find_distro}" == "sles" ]] ; then
# Distribution is SuSe Linux
lsinitrd /boot/initrd-$(uname -r)|grep nvme > /dev/null 2>&1
if [ $? -ne 0 ]; then
# NVMe module is not loaded in initrd/initramfs
echo -e "\n\nERROR NVMe Module is not loaded in the initramfs image.\n\t- Please run the following command on your instance to recreate initramfs:"
echo -e '\t# sudo dracut -f -v'
fi
elif [ -f /etc/debian_version ] ; then
# Distribution is debian based(Debian/Ubuntu)
lsinitramfs /boot/initrd.img-$(uname -r)|grep nvme > /dev/null 2>&1
if [ $? -ne 0 ]; then
# NVMe module is not loaded in initrd/initramfs
echo -e "\n\nERROR NVMe Module is not loaded in the initramfs image.\n\t- Please run the following command on your instance to recreate initramfs:"
echo -e '\t# sudo update-initramfs -c -k all'
fi
else
echo -e "\n\nUnsupported OS for this script."
echo -e "\n\n------------------------------------------------"
exit 1
fi
}
########################################################################
check_fstab () {
time_stamp=$(date +%F-%H:%M:%S)
cp /etc/fstab /etc/fstab.backup.$time_stamp
cp /etc/fstab /etc/fstab.modified.$time_stamp
sed -n 's|^/dev/\([sx][v]*d[a-z][0-9]*\).*|\1|p' </etc/fstab >/tmp/device_names # Stores all /dev/sd* and /dev/xvd* entries from fstab into a temporary file
while read LINE; do
# For each line in /tmp/device_names
UUID=`ls -l /dev/disk/by-uuid | grep "$LINE" | sed -n 's/^.* \([^ ]*\) -> .*$/\1/p'` # Sets the UUID name for that device
if [ ! -z "$UUID" ]
then
sed -i "s|^/dev/${LINE}|UUID=${UUID}|" /etc/fstab.modified.$time_stamp # Changes the entry in fstab to UUID form
fi
done </tmp/device_names
if [ -s /tmp/device_names ]; then
echo -e "\n\nERROR Your fstab file contains device names. Mount the partitions using UUID's before changing an instance type to Nitro." # Outputs the new fstab file
printf "\nEnter y to replace device names with UUID in /etc/fstab file to make it compatible for NVMe block device names.\nEnter n to keep the file as-is with no modification (y/n) "
read RESPONSE;
case "$RESPONSE" in
[yY]|[yY][eE][sS]) # If answer is yes, keep the changes to /etc/fstab
echo "Writing changes to /etc/fstab..."
echo -e "\n\n***********************"
cp /etc/fstab.modified.$time_stamp /etc/fstab
echo -e "***********************"
echo -e "\nOriginal fstab file is stored as /etc/fstab.backup.$time_stamp"
rm /etc/fstab.modified.$time_stamp
;;
[nN]|[nN][oO]|"") # If answer is no, or if the user just pressed Enter
echo -e "Aborting: Not saving changes...\nPrinting correct fstab file below:\n\n" # don't save the new fstab file
cat /etc/fstab.modified.$time_stamp
rm /etc/fstab.backup.$time_stamp
rm /etc/fstab.modified.$time_stamp
;;
*) # If answer is anything else, exit and don't save changes
echo "Invalid Response" # to fstab
echo "Exiting"
rm /etc/fstab.backup.$time_stamp
rm /etc/fstab.modified.$time_stamp
exit 1
echo -e "------------------------------------------------"
;;
esac
rm /tmp/device_names
else
rm /etc/fstab.backup.$time_stamp
rm /etc/fstab.modified.$time_stamp
echo -e "\n\nOK fstab file looks fine and does not contain any device names. "
fi
}
########################################################################
# Main code starts from here
PATH=/bin:/sbin:/usr/bin:/usr/sbin
if [ `id -u` -ne 0 ]; then # Checks to see if script is run as root
echo -e "------------------------------------------------"
echo -e "\nThis script must be run as root" >&2 # If it isn't, exit with error
echo -e "\n------------------------------------------------"
exit 1
fi
(grep 'nvme' /boot/System.map-$(uname -r)) > /dev/null 2>&1
if [ $? -ne 0 ]
then
# NVMe modules is not built into the kernel
(modinfo nvme) > /dev/null 2>&1
if [ $? -ne 0 ]
then
# NVMe Module is not installed.
echo -e "------------------------------------------------\nERROR NVMe Module is not available on your instance. \n\t- Please install NVMe module before changing your instance type to Nitro. Look at the following link for further guidance:"
echo -e "\t> https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/nvme-ebs-volumes.html"
else
echo -e "------------------------------------------------\n"
echo -e "OK NVMe Module is installed and available on your instance"
check_NVMe_in_initrd # Calling function to check if NVMe module is loaded in initramfs.
fi
else
# NVMe modules is built into the kernel
echo -e "------------------------------------------------\n"
echo -e "OK NVMe Module is installed and available on your instance"
fi
modinfo ena > /dev/null 2>&1
if [ $? -ne 0 ]
then
# ENA Module is not installed.
echo -e "\n\nERROR ENA Module is not available on your instance. \n\t- Please install ENA module before changing your instance type to Nitro. Look at the following link for further guidance:"
echo -e "\t> https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/enhanced-networking-ena.html#enhanced-networking-ena-linux"
else
ena_version=`modinfo ena|grep -Eo '^version:.*' | awk '{print $2}'`
echo -e "\n\nOK ENA Module with version $ena_version is installed and available on your instance"
fi
check_fstab
echo -e "\n------------------------------------------------"